WO2013125027A1

WO2013125027A1 - Communication device, communication method and program

Info

Publication number: WO2013125027A1
Application number: PCT/JP2012/054556
Authority: WO
Inventors: 洋平塚本
Original assignee: 三菱電機株式会社
Priority date: 2012-02-24
Filing date: 2012-02-24
Publication date: 2013-08-29
Also published as: JP5183829B1; TW201335727A; CN104137487A; JPWO2013125027A1; TWI498697B; CN104137487B

Abstract

When a failure has occurred during transmission of control data (A) to a communication device (node 3), a communication device (node 2) interrupts the transmission of the control data (control data A'), starts transmission of failure data (E) that reports the failure, and after the transmission of the failure data (E), resumes the transmission of the control data (A) from where the interruption was made (control data A'').

Description

COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM

The present invention relates to a technique for transmitting data.
In the following, as an example, data transmission in an FA (Factory Automation) network will be described.

A factory line is one that produces products continuously.
Therefore, the factory line has a function of automatically manufacturing a product by operating a plurality of devices in cooperation with each other.
There is an FA network as a method for realizing the cooperative operation of devices in the FA.
In the FA network, one control device (controller) and a plurality of machine tools (slave) are used.
The connection between the devices is an Ethernet (registered trademark) -based daisy chain connection, and exchanges information in units of communication frames (hereinafter also simply referred to as “frames”).
Communication between non-adjacent nodes is realized by relay.

The linked operation of the devices is realized by communication between the controller and the slave.
First, the controller gives a control instruction to a plurality of slaves.
More specifically, the controller transmits a control instruction to the slave at the adjacent position, and the slave next to the controller further transfers the control instruction to the adjacent slave. Propagate control instructions.
Each slave operates according to instructions from the controller, and returns a control result to the controller.
Also in the case of a control result response, the control result response reaches the controller through transfer between slaves.
The controller receives the control result from each slave, determines the next instruction, and gives the next instruction to each slave.
The controller and slave periodically repeat the above operation.
As described above, products can be manufactured by automatically operating a plurality of devices in cooperation with each other.
In order to control a device with high accuracy, it is necessary to perform control communication between the controller and the slave in a short cycle.

In addition to the function of manufacturing devices by operating devices in cooperation with each other, the FA network has a function of safely stopping other devices when a device fails (hereinafter referred to as “fault management”).
In order to realize this function, the slave in which the failure has occurred performs failure notification (hereinafter referred to as “failure notification”) to the controller and other slaves.
The failure notification frame (failure frame) is also relayed between adjacent nodes in the same manner as the frame for control communication, and reaches the controller and all other slaves.
Controllers and slaves that have received the fault frame are safely stopped.
As described above, when a device failure occurs, all the devices included in the FA network can be safely stopped.
As described above, in the FA network, it is necessary to perform control communication in a short cycle, and it is necessary to perform failure notification in a short time for failure management.

In this regard, in the prior art, the failure frame is preferentially transmitted by controlling the order of frames to be transmitted according to the priority, thereby realizing failure notification in a short time.

For example, in Patent Document 1, a frame relayed by a node is divided into a priority relay frame and a non-priority relay frame, a frame transmitted from the own node is divided into a priority transmission frame and a non-priority transmission frame, and a buffer for each frame (a total of four Buffer), and the node transmits each frame according to the priority order between frames.
A priority relay frame, a priority transmission frame, a non-priority relay frame, and a non-priority transmission frame are in descending order of priority.
When non-priority relay frames accumulate in the buffer, buffer overflow is prevented by suppressing input of non-priority transmission frames to the buffer.

When the technique of Patent Document 1 is applied to an FA network, a failure frame relayed by a node is a priority relay frame of Patent Document 1, a failure frame transmitted from the node is a priority transmission frame of Patent Document 1, and these failure frames (priority relay) By transmitting the frame and the priority transmission frame) in preference to the control frame (non-priority relay frame and non-priority transmission frame) for control communication, it is possible to realize failure notification in a short time.

JP 2002-353970 A

As described above, when the method of Patent Document 1 is applied to an FA network, a failure frame can be transmitted with priority over a control frame, and failure notification in a short time can be realized.

However, the method of Patent Document 1 has the following problems.

FIG. 43 is a diagram for explaining a problem in the method of Patent Document 1.
FIG. 43 shows, as an example, the transmission / reception status of communication frames in an FA network composed of three nodes.
In FIG. 43, A, B, and C represent control frames transmitted from the node 1, and E represents a failure frame transmitted from the node 2.

From the node 1, a control frame A, a control frame B, and a control frame C are sequentially transmitted.
The node 2 receives the control frame from the node 1, stores the received control frame in a predetermined buffer, and transfers the received control frame to the node 3.
Here, it is assumed that a failure occurs in the node 2 while the node 2 is transmitting the control frame A to the node 3, and it is necessary to transmit the failure frame E.
In Patent Document 1, the node 2 transmits the failure frame E to the node 3 after completing the transmission of the control frame A, and then transmits the control frame B and the control frame C.

As described above, in Patent Document 1, when a failure occurs during transmission of a control frame, the completion of transmission of the control frame being transmitted is waited, and then the failure frame is transmitted.
For example, if a failure occurs immediately after starting to transmit a control frame, transmission of the failure frame is delayed by the amount of transmission of one control frame.

The present invention has been made in view of these points, and when specific data to be transmitted with priority during transmission of a communication frame is newly generated, the specific data can be transmitted efficiently and quickly. In addition, the main object is to enable early transmission of data that has not been transmitted when specific data is generated.

The communication device according to the present invention is
A data transmission unit that sequentially transmits data to be transmitted in one communication frame from the top;
When specific data is newly generated before the data transmission unit completes data transmission, the data type of untransmitted untransmitted data is analyzed at the time of generation of the specific data, and the specific data is A transmission determining unit for determining whether to transmit before the untransmitted data;
When the transmission determining unit determines to transmit the specific data before the untransmitted data, the specific data is transmitted before the untransmitted data, and the transmission of the specific data is completed An order control unit that controls the transmission order of the specific data and the non-transmitted data so that transmission of the non-transmitted data is started,
The data transmitter is
When the transmission determining unit determines to transmit the specific data before the untransmitted data, the specific data is transmitted before the untransmitted data based on the transmission order control by the sequence control unit. The transmission after the transmission of the specific data is started from the untransmitted data.

According to the present invention, since specific data is transmitted before untransmitted data, specific data can be transmitted efficiently and early, and transmission after completion of transmission of specific data is not performed. Since transmission data is started, transmission of untransmitted data can be completed early.

FIG. 3 shows an overview of a communication method according to the first embodiment. FIG. 3 shows a configuration example of a communication apparatus according to the first embodiment. FIG. 3 shows a configuration example of a communication frame according to the first embodiment. The figure which shows the control frame which does not contain the failure data which concerns on Embodiment 1. FIG. FIG. 4 is a diagram showing a control frame including failure data according to the first embodiment. The figure which shows the division | segmentation frame which does not contain the failure data which concerns on Embodiment 1. FIG. The figure which shows the division | segmentation frame which does not contain the failure data which concerns on Embodiment 1. FIG. FIG. 6 is a diagram showing a failure frame according to the first embodiment. The figure which shows the example of insertion to the control frame of the failure data which concerns on Embodiment 1. FIG. The figure which shows the example of insertion to the control frame of the failure data which concerns on Embodiment 1. FIG. The figure which shows the example of insertion to the control frame of the failure data which concerns on Embodiment 1. FIG. The figure which shows the example of insertion to the control frame of the failure data which concerns on Embodiment 1. FIG. FIG. 3 is a diagram showing an outline of a data restoration method according to the first embodiment. FIG. 3 is a diagram illustrating a configuration example of a transmission frame generation unit according to the first embodiment. FIG. 3 is a diagram illustrating a configuration example of a reception data reconstruction unit according to the first embodiment. FIG. 3 is a flowchart showing an operation example at the time of frame reception according to the first embodiment. FIG. 3 is a flowchart showing an operation example at the time of data generation according to the first embodiment. FIG. 3 is a flowchart showing an operation example at the time of frame transmission according to the first embodiment. FIG. 3 is a flowchart showing an operation example at the time of frame transmission according to the first embodiment. FIG. 3 is a flowchart showing an operation example at the time of frame transmission according to the first embodiment. FIG. 4 is a flowchart showing an operation example of divided frame transmission processing according to the first embodiment. FIG. 6 is a flowchart showing an operation example of failure frame transmission processing according to the first embodiment. FIG. 4 is a diagram illustrating a configuration example of a communication device according to a second embodiment. FIG. 6 is a flowchart showing an operation procedure of the communication apparatus according to the second embodiment. The flowchart figure which shows the process at the time of the header reception state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the control reception state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the interruption failure reception state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the fault reception state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the transmission standby state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the self-device transmission state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the own apparatus self-apparatus state and self-apparatus relay state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the own apparatus division state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the relay transmission state which concerns on Embodiment 2. FIG. The flowchart figure which shows the process at the time of the relay own apparatus state which concerns on Embodiment 2, and a relay relay state. The flowchart figure which shows the process at the time of the relay division | segmentation state which concerns on Embodiment 2. FIG. FIG. 9 is a flowchart showing processing in a relay failure state according to the second embodiment. The flowchart figure which shows the process at the time of the own apparatus fault state which concerns on Embodiment 2. FIG. FIG. 9 is a flowchart showing output processing of the external input / output device according to the second embodiment. The flowchart figure which shows the process at the time of the reception standby state which concerns on Embodiment 2. FIG. The figure which shows the state transition at the time of the frame reception which concerns on Embodiment 2. FIG. The figure which shows the state transition at the time of the frame transmission which concerns on Embodiment 2. FIG. FIG. 3 is a diagram illustrating a hardware configuration example of a communication device according to the first and second embodiments. The figure which shows the outline | summary of the conventional communication method.

In Embodiments 1 and 2 described below, an example will be described in which a failure notification time is shortened by interrupting a failure frame in a control frame while keeping the control communication cycle short.
In the first and second embodiments, as a restriction, in order to maintain the periodicity of control communication, the number of communication devices that perform control frame transmission is one on the network at the same time, and the transmission of fault frames is a control frame. It is assumed to be once per communication cycle.
In the FA network, the same restriction is often imposed in order to maintain the periodicity of control communication.

Here, with reference to FIG. 1, a frame transmission procedure in the first and second embodiments will be outlined.
FIG. 1 shows the transmission / reception status of communication frames in an FA network composed of three communication devices (node 1, node 2, and node 3), as in FIG.
In FIG. 1, A, B, and C represent control frames transmitted from the communication device (node 1).
Note that E represents failure data transmitted from the communication device (node 2).
The failure data E is data for notifying the occurrence of a failure, and includes the payload portion of the failure frame described with reference to FIG. 43 and a predetermined delimiter.
The failure data E is data to be transmitted with priority over the control data in the control frame.

A control frame A, a control frame B, and a control frame C are sequentially transmitted from the communication device (node 1).
The communication device (node 2) receives the control frame from the communication device (node 1), stores the received control frame in a predetermined buffer, and transfers the received control frame to the communication device (node 3).
Here, it is assumed that a failure occurs in the communication device (node 2) while the communication device (node 2) is transmitting the control frame A to the communication device (node 3), and it becomes necessary to transmit the failure data E. .
In the first and second embodiments, the communication device (node 2) interrupts transmission of control data (control data A ′), starts transmission of failure data E, and transmits failure data E as part of the control frame A. Transmit to node 3.
When the communication device (node 2) completes the transmission of the failure data E, the communication device (node 2) starts transmitting the control data from the position where the transmission is interrupted using the control frame A stored in the buffer (control data A ′). ').

As described above, in Patent Document 1 (FIG. 43), when a failure occurs during transmission of a control frame, transmission of the failure frame is performed after transmission of the control frame is completed.
On the other hand, in Embodiments 1 and 2 (FIG. 1), the failure data is inserted into the control frame, the failure data is transmitted as a part of the control frame, and the remaining portion of the control frame is transmitted after the failure data is transmitted. Send data only.
As a result, when failure data occurs during transmission of the control frame, the failure data can be transmitted efficiently and early.
As described above, according to the systems of the first and second embodiments, it is possible to reduce the failure notification time while keeping the control communication cycle short.

Embodiment 1 FIG.
FIG. 2 shows a configuration example of the communication apparatus 100 according to the present embodiment.
The communication device 100 receives the frame from the communication device 200 and transmits the frame to the communication device 300.
For the communication device 100, the communication device 200 is an example of an external device.
The frames transmitted from the communication apparatus 100 to the communication apparatus 300 are a frame received from the communication apparatus 200 and a frame generated by the communication apparatus 100.
Further, the communication device 100 inserts the failure data generated by the communication device 100 into the control frame received from the communication device 200, and transmits the control frame from the communication device 200 into which the failure data generated by the communication device 100 is inserted. It may be transmitted to 300.
Further, the communication device 100 inserts the failure data received from the communication device 200 into the control frame received from the communication device 200, and transmits the control frame from the communication device 200 into which the failure data received from the communication device 200 is inserted. It may be transmitted to 300.
Also, the communication device 100 inserts the failure data received from the communication device 200 into the control frame generated by the communication device 100, and communicates the control frame generated by the communication device 100 into which the failure data received from the communication device 200 is inserted. It may be transmitted to the device 300.
Further, the communication device 100 inserts the failure data generated by the communication device 100 into the control frame generated by the communication device 100 and communicates the control frame generated by the communication device 100 into which the failure data generated by the communication device 100 is inserted. It may be transmitted to the device 300.
2 shows a configuration example of the communication device 100, the communication device 200 and the communication device 300 also have the configuration shown in FIG.

The control unit 101 controls the operation of each element 102 to 107 described later.

The frame receiving unit 102 receives a frame from the communication device 200.
The frame receiving unit 102 corresponds to an example of a data receiving unit.

The reception data distribution unit 103 transfers the frame received by the frame reception unit 102 to a reception data reconstruction unit 104 and a transmission frame generation unit 106 described later.
Also, the reception data distribution unit 103 determines the type of frame received by the frame reception unit 102, and if the frame received by the frame reception unit 102 is a failure frame described later, the transmission frame generation unit 106 described later receives a failure frame. Notify receipt of.

The reception data reconstruction unit 104 extracts control data for control communication from the frame received by the frame reception unit 102, and reconstructs the control data.
Details of the received data reconstruction unit 104 will be described later.

The data generation unit 105 generates a frame (data) to be transmitted from the frame transmission unit 107.
If the generated frame is a fault frame, the data generation unit 105 notifies the transmission frame generation unit 106 of the generation of the fault frame.

The transmission frame generation unit 106 receives the frame received by the frame reception unit 102 from the reception data distribution unit 103, and also receives the frame generated by the data generation unit 105 and generates a frame to be transmitted from the frame transmission unit 107. .
The transmission frame generation unit 106 also includes a failure included in the failure frame when the reception data distribution unit 103 is notified of the reception of the failure frame or when the data generation unit 105 is notified of the generation of the failure frame. A frame is generated so that data is transmitted from the frame transmission unit 107 with priority.
Details of the transmission frame generation unit 106 will be described later.

The frame transmission unit 107 transmits a frame to the communication device 300.
More specifically, the frame transmission unit 107 transmits data to be transmitted in one frame in order from the top.
The frame transmission unit 107 corresponds to an example of a data transmission unit.

Next, the frame format of frames transmitted and received between the communication device 100, the communication device 200, and the communication device 300 will be described.

FIG. 3 shows a template for all frames.
The frame 1000 includes a frame header 1010 and frame data 1020.
The frame header 1010 includes a frame type 1011 and a frame size 1012.
The frame type 1011 indicates the type of the frame 1000, and there are three types of the frame 1000: a control frame, a divided frame, and a failure frame.
The control frame is a frame including control data.
The divided frame is a frame including data (control data, failure data) pushed out from the control frame due to failure data included in the control frame.
The failure frame is a frame including failure data.
The frame size 1012 is a frame size for detecting completion of reception of the frame 1000.
The frame size 1012 shows the data size of the entire frame 1000.

Hereinafter, the three types of frames will be described with reference to FIGS.
The three types of frames have a frame type 1011, a frame size 1012, and frame data 1020 in common.
Frame headers 1010 having a frame type 1011 indicating a control frame are referred to as control frame headers 2010 and 3010.
A frame header 1010 having a frame type 1011 indicating a divided frame is referred to as a divided frame header 4010, 5010.
A frame header 1010 having a frame type 1011 indicating a failure frame is referred to as a failure frame header 6010.
The three types of frames have frame data 1020 having different configurations.
The components of the frame data 1020 are the control data 2020, the pre-failure division control data 3020, the

delimiters

3030 and 5020, the

fault data

3040, 5030 and 6020, the post-failure division control data 3050, and the split control pushed out of the frame Data 4020.

Next, the frame format of the control frame will be described with reference to FIGS.
The control frame includes a control frame 2000 that does not include failure data and a control frame 3000 that includes failure data.

As shown in FIG. 4, in a control frame 2000 that does not include failure data, 2010 is a control frame header and 2020 is control data.
The control frame 2000 that does not include failure data remains the control frame received by the frame receiving unit 102 and the control frame generated by the data generating unit 105.

As shown in FIG. 5, in the control frame 3000 including failure data, 3010 is a control frame header, 3020 is division control data before failure occurrence, 3030 is a delimiter for detecting the range of failure data, Reference numeral 3040 denotes failure data, and reference numeral 3050 denotes post-failure division control data.
In the control frame 3000 including failure data, a delimiter 3030 and failure data 3040 are inserted into the control frame received by the frame reception unit 102 and the control frame generated by the data generation unit 105 in the frame transmission unit 107.
The control frame header 3010 is the same as the control frame header 2010 of the control frame 2000 that does not include failure data.
In other words, the control frame header 3010 has not changed from the control frame header of the control frame before the delimiter 3030 and the failure data 3040 are inserted.

Next, the frame format of the divided frames will be described with reference to FIGS.
The divided frames include a divided frame 4000 that does not include failure data and a divided frame 5000 that includes failure data.
Note that the frame transmission unit 107 generates both the divided frame 4000 not including the failure data and the divided frame 5000 including the failure data.

As shown in FIG. 6, in a divided frame 4000 that does not include failure data, 4010 is a divided frame header, and 4020 is divided control data pushed out of the frame.
As shown in FIG. 5, in the divided frame 4000 not including the failure data, the delimiter 3030 and the failure data 3040 are inserted into the control frame. The division control data 4020 is included.

As shown in FIG. 7, in a divided frame 5000 including failure data, 5010 is a divided frame header, 5020 is a delimiter, and 5030 is failure data.
In the divided frame 5000 including the failure data, a new delimiter 3030 and the failure data 3040 are inserted into the control frame including the delimiter 5020 and the failure data 5030 at the end, and the portion ( Delimiter 5020 and failure data 5030).

Next, the frame format of the failure frame will be described with reference to FIG.
In the

failure frame

6000, 6010 is a failure frame header, and 6020 is failure data.
The failure frame 6000 is a failure frame received by the frame reception unit 102 and a failure frame generated by the data generation unit 105.
It should be noted that no other fault data is inserted into the fault frame 6000.

4 to 8, the frame header has a predetermined size, the delimiter has a predetermined size, and the failure data has a predetermined size.
The size of the control frame is variable.
However, as described above, even when the failure data and the delimiter are inserted into the control frame (FIG. 5), the size of the control frame after the insertion of the failure data and the delimiter is maintained at the original size.
For this reason, data corresponding to the data size of the delimiter and the failure data is pushed out, and the pushed-out data is transmitted in divided frames (FIGS. 6 and 7).
Further, the frame type, the frame size, and the position of the frame data from the top of the frame are determined in advance.

In this embodiment, data is exchanged in word units between the communication device 100, the communication device 200, and the communication device 300.
One word is the same size as the delimiter.

Note that the communication device 100 inserts failure data into the control frame according to the following rules.
rule:
When failure data occurs during transmission of a control frame, and the data type of the data located at the beginning of untransmitted untransmitted data (head untransmitted data) at the time of failure data generation is not a priority type (that is, When the head untransmitted data is control data), the communication apparatus 100 immediately starts transmitting the delimiter and the failure data (that is, the delimiter and the failure data are transmitted prior to the control data that is the head untransmitted data). .
On the other hand, when the data type of the head untransmitted data is the priority type (that is, when the head untransmitted data is fault data), the communication device 100 completes the transmission of the fault data including the head untransmitted data. Transmission of newly generated failure data is started (that is, after the failure data including the head untransmitted data is transmitted, the delimiter and new failure data are transmitted).
Note that “when failure data occurs” includes both when the communication device 100 receives a failure frame from the communication device 200 and when the data generation unit 105 in the communication device 100 generates a failure frame.
The control frame being transmitted by the communication apparatus 100 is either a control frame received by the frame reception unit 102 from the communication apparatus 200 or a control frame generated by the data generation unit 105 of the communication apparatus 100.
As a result of transmitting the failure data with priority, the pushed-out data is transmitted as a divided frame following the control frame.

Next, a specific example of the control frame 3000 including the failure data shown in FIG. 5 will be described with reference to FIGS.

FIG. 9 shows an example in which failure data is inserted into a control frame 2000a that does not include failure data.
9 to 12, the control frame header is represented as “control”, and the control data is represented as “A”.
Also, the divided frame header is described as “divided”.
In the example of FIG. 9, the untransmitted head data at the time when the failure data occurs is the control data, so the communication device 100 immediately starts transmitting the failure data E (delimiter and failure data).
As a result, the failure data E is transmitted as shown in the control frame 3000a.
In FIG. 9, the delimiter and failure data are combined into failure data E.
10 to 12, the failure data E is written, but the failure data E is a combination of a delimiter and failure data as in FIG.
When the transmission of the failure data E ends, the communication device 100 transmits the control data A that has not been transmitted.
Since the failure data E is inserted, a part of the untransmitted control data A cannot be included in the control frame 3000a.
For this reason, the communication apparatus 100 transmits some control data that could not be included in the control frame 3000a in the divided frame 4000a.
As a result, the failure data E, the control data A (1/3) before insertion of the failure data E, and the control data A (2/3) after insertion of the failure data E are transmitted in the same control frame 3000a. The extruded control data A (3/3) is transmitted in the divided frame 4000a.

FIG. 10 shows an example in which new failure data E1 is inserted into the control frame 3000b including the failure data E0.
A part of the control data A (control data A (3/3)) pushed out from the control frame 3000b because the failure data E0 is inserted is included in the subsequent divided frame 4000b.
In the example of FIG. 10, since the untransmitted head data at the time when the failure data occurs is the control data A (1/3), the communication device 100 immediately starts transmitting the failure data E1.
As a result, the transmission of the failure data E1 starts in the middle of the control data A (1/3), and after the transmission of the failure data E1, the communication apparatus 100 determines that the untransmitted part of the control data A (1/3) and the failure Data E0 and control data A after the failure data E0 are transmitted in the control frame 3000c.
Since the failure data E1 is inserted, a part of the control data A cannot be included in the control frame 3000c.
For this reason, the communication apparatus 100 transmits a part of control data that could not be included in the control frame 3000c in the divided frame 4000c.
In addition, after transmitting the divided frame 4000c, the communication device 100 transmits the divided frame 4000b as the divided frame 4000d.
As a result, the failure data E1, the control data A (1/5) before the failure data E1 is inserted, the control data A (2/5) after the failure data E1 is inserted, the failure data E0, and the failure data E0. The control data A (3/5) after is transmitted in the same control frame 3000c, the extruded control data A (4/5) is transmitted in the divided frame 4000c, and the control data A (5 in the divided frame 4000b is further transmitted. / 5) is transmitted in the divided frame 4000d.

FIG. 11 shows an example in which new failure data E1 is inserted into the control frame 3000e including the failure data E0.
A part of the control data A (control data A (3/3)) pushed out from the control frame 3000e because the failure data E0 is inserted is included in the subsequent divided frame 4000e.
In the example of FIG. 11, since the untransmitted head data at the time when the failure data occurs is the control data A (2/3), the communication device 100 immediately starts transmitting the failure data E1.
As a result, transmission of the failure data E1 starts in the middle of the control data A (2/3), and after the transmission of the failure data E1, the communication apparatus 100 controls the untransmitted portion of the control data A (2/3) as a control frame. Transmit at 3000f.
The control frame 3000f also includes control data A (1/5), failure data E0, and control data A (2/5) transmitted before the occurrence of the failure data.
Since the failure data E1 is inserted, a part of the control data A (2/3) cannot be included in the control frame 3000f.
For this reason, the communication apparatus 100 transmits some control data that could not be included in the control frame 3000f in the divided frame 4000f.
In addition, after transmitting the divided frame 4000f, the communication device 100 transmits the divided frame 4000e as the divided frame 4000g.
As a result, the control data A (1/5), the failure data E0, the control data A (2/5), the failure data E1, and the control data A (3/5) after insertion of the failure data E1 are the same. The control data A (4/5) transmitted and transmitted in the control frame 3000f is transmitted in the divided frame 4000f, and further, the control data A (5/5) in the divided frame 4000e is transmitted in the divided frame 4000g.

FIG. 12 shows an example in which new failure data E1 is inserted into the control frame 3000h including the failure data E0.
Part of the control data A (control data A (3/3)) pushed out from the control frame 3000h because the failure data E0 is inserted is included in the subsequent divided frame 4000h.
In the example of FIG. 12, since the untransmitted head data at the time when the failure data occurs is the failure data E0, the communication apparatus 100 waits for the completion of the transmission of the failure data E0 and starts transmitting the failure data E1.
The control frame 3000i also includes control data A (1/5) transmitted before the failure data E0.
Since the failure data E1 is inserted, a part of the control data A (2/3) cannot be included in the control frame 3000i.
For this reason, the communication apparatus 100 transmits some control data that could not be included in the control frame 3000i in the divided frame 4000i.
In addition, after transmitting the divided frame 4000i, the communication device 100 transmits the divided frame 4000h as the divided frame 4000j.
As a result, the control data A (1/4), the failure data E0, the failure data E1, and the control data A (2/4) after the insertion of the failure data E1 are transmitted and pushed out in the same control frame 3000i. Control data A (3/4) is transmitted in divided frame 4000i, and control data A (4/4) of divided frame 4000h is transmitted in divided frame 4000j.

Next, based on the above description, details of the transmission frame generation unit 106 will be described.
FIG. 14 illustrates an internal configuration example of the transmission frame generation unit 106.
As shown in FIG. 14, the transmission frame generation unit 106 is roughly divided into a transmission buffer unit 110 and a frame generation management unit 120.
In FIG. 14, the control unit 101 and the received data reconstruction unit 104 are not shown.

In the transmission buffer unit 110, the failure frame buffer unit 111 stores the failure frame transferred from the reception data distribution unit 103 and the failure frame generated by the data generation unit 105 using a FIFO (First-In First-Out) method. To do.
The fault frame buffer unit 111 stores the entire fault frame including the fault frame header.
The control frame buffer unit 112 includes a control frame transferred from the received data distribution unit 103 (both a control frame including failure data and a control frame not including failure data) and a control frame generated by the data generation unit 105. Then, the divided frames transferred from the reception data distribution unit 103 (both divided frames including failure data and divided frames not including failure data) are accumulated by the FIFO method.
The control frame buffer unit 112 accumulates the entire control frame including the control frame header, and accumulates the entire divided frame including the divided frame header.

In the frame generation management unit 120, the transmission determination unit 121 determines the data type (control of the head untransmitted data) when failure data (an example of specific data) occurs before the frame transmission unit 107 completes data transmission. Data or failure data) and determine whether failure data is transmitted before untransmitted data.
That is, if the head untransmitted data is control data, the transmission determining unit 121 determines to transmit the failure data prior to the head untransmitted data (control data).
On the other hand, if the head untransmitted data is failure data, the transmission determining unit 121 determines to transmit new failure data after the failure data including the head untransmitted data is transmitted.
Note that the transmission determination unit 121 can detect the occurrence of failure data based on a notification from the reception data distribution unit 103 or the data generation unit 105.
In addition, the transmission determination unit 121 stores a data size of failure data in advance.

The sequence control unit 122 reads the data in the control frame buffer unit 112 word by word, and outputs the read one-word data to the frame transmission unit 107 unless the transmission determination unit 121 detects the occurrence of failure data. .
When the transmission determination unit 121 detects the occurrence of failure data, the order control unit 122 reads the data in the failure frame buffer unit 111 word by word until the predetermined data size of the failure data is reached, and reads 1 The word data is output to the frame transmission unit 107.
That is, the sequence control unit 122 outputs the data in the control frame buffer unit 112 when the transmission determination unit 121 detects the occurrence of failure data while outputting the data in the control frame buffer unit 112 to the frame transmission unit 107. Is stopped from being output to the frame transmission unit 107, and the data in the failure frame buffer unit 111 is output to the frame transmission unit 107 until the data size of the failure data is reached.
As described above, the order control unit 122 controls the transmission order of the failure data and the control data so that the failure data is transmitted first.

The remaining data size counting unit 123 counts the remaining transmittable data size (hereinafter referred to as “transmittable remaining size”) and the remaining frame data size (hereinafter referred to as “frame remaining size”).
The remaining transmittable size is the remaining data size that can be transmitted in the current control frame.
That is, the remaining transmittable size is data obtained by subtracting the data size (default data size) of the control frame header 2010 from the data size described in the frame size 1012 (FIG. 3) of the control frame header 2010 (FIG. 4). This is a value obtained by subtracting the total size of the data size of the transmitted control data and the data size of the transmitted fault data (inserted fault data) from the size (data size of the control data 2020).
The remaining frame size is the data size of untransmitted control data among the control data included in the current control frame.
That is, the remaining frame size is a data size obtained by subtracting the data size (default data size) of the control frame header 2010 from the data size described in the frame size 1012 (FIG. 3) of the control frame header 2010 (FIG. 4). This is a value obtained by subtracting the data size of the transmitted control data from (the data size of the control data 2020).
If the remaining transmittable size at the time of occurrence of the failure data is equal to or greater than the sum of the data size of the failure data and the data size of the delimiter, the transmission determining unit 121 transmits the failure data in the current control frame. decide.
On the other hand, if the remaining transmittable size at the time of occurrence of the failure data is less than the sum of the data size of the failure data and the data size of the delimiter, the transmission determining unit 121 determines that the failure data is not the current control frame. And decide to transmit in subsequent frames.

Next, details of the received data reconstruction unit 104 will be described.
FIG. 15 shows an internal configuration example of the reception data reconstruction unit 104.
As shown in FIG. 15, the received data reconstruction unit 104 is roughly divided into a reconstruction buffer unit 130 and a reconstruction management unit 140.
In FIG. 15, the control unit 101, the data generation unit 105, the transmission frame generation unit 106, and the frame transmission unit 107 are not shown.

In the reconfiguration buffer unit 130, the failure frame buffer unit 131 accumulates the failure frame transferred from the reception data distribution unit 103 by the FIFO method.
The fault frame buffer unit 131 stores the entire fault frame including the fault frame header.
The control frame buffer unit 132 includes a control frame (both a control frame including failure data and a control frame not including failure data) and a divided frame (a divided frame including failure data) transferred from the reception data distribution unit 103. Both of the divided data not including the failure data) are accumulated by the FIFO method.
Note that the control frame buffer unit 132 accumulates the entire control frame including the control frame header and accumulates the entire divided frame including the divided frame header.

In the reconfiguration management unit 140, the data extraction unit 141 reads data from the control frame buffer unit 132. If the read data is control data, the control data is transferred to the control data stack 144 (an example of a divided data storage unit). If the pushed and read data is fault data, the fault data is pushed to the fault data stack 145.

The data size counting unit 142 counts the cumulative value of the data size of the control data stored in the control data stack 144, and calculates the cumulative value of the data size of the fault data stored in the fault data stack 145. Count.

The data restoration unit 143 derives the data size of the control data by subtracting the data size of the control frame header from the data size described in the frame size of the control frame header of the control frame.
When the cumulative value of the data size counted by the data size counting unit 142 reaches the data size of the derived control data, the control data is restored using the control data stored in the control data stack 144. To do.
That is, when one piece of control data included in one control frame is divided into a plurality of partial data due to the insertion of failure data, the data restoration unit 143 determines the control data before division from the frame size of the control frame header. When the count value of the data size count unit 142 reaches the total data size of the derived control data, the partial data of the control data stored in the control data stack 144 is integrated. Thus, the control data before division can be restored.
Similarly, the data restoration unit 143 is stored in the failure data stack 145 when the cumulative value of the data size counted by the data size counting unit 142 reaches the data size (default size) of the failure data. The original failure data is restored using the existing failure data.

FIG. 13 shows the operation principle of the reception data reconstruction unit 104.
For example, it is assumed that the communication apparatus 100 receives the control frame 3000l and the divided frame 4000l as a result of the failure data E1 being inserted into the control frame 3000k in the communication apparatus 200.
Further, it is assumed that the communication apparatus 100 receives the divided frame 4000l subsequent to the control frame 3000k as the divided frame 4000m.
As described above, the data size of control data A before division (the total size of control data A (1/4) to A (4/4)) can be derived from the frame size of the control frame header of control frame 3000l. is there.
The received data distribution unit 103 of the communication apparatus 100 transfers the control frame 3000l, the divided frame 4000l, and the divided frame 4000m to the received data reconstruction unit 104. In the received data reconstruction unit 104, the control frame buffer unit 132 transmits these frames. accumulate.
Then, the data extraction unit 141 reads data from the control frame buffer unit 132 from the head of the control frame 3000l.
When the data extraction unit 141 reads the frame size of the control frame header, the data restoration unit 143 derives the data size of the control data from the data size described in the frame size, and the data size of the derived control data is the data Register in the size counting unit 142.
The data extraction unit 141 sequentially reads data in the control frame 3000l, and pushes it to the control data stack 144 if the read data is control data, and pushes it to the fault data stack 145 if it is fault data.
The data size counting unit 142 counts the data size in the control data stack 144 and the data size in the failure data stack 145.
Since the data next to the delimiter is fault data, the data extraction unit 141 determines that the read data is control data until the delimiter appears.
After the delimiter appears and after reading the data size (predetermined size) of the failure data, the data extraction unit 141 determines that the control data has been read again.
Thereafter, similarly, the data extraction unit 141 reads the data of the divided frame 4000l and the data of the divided frame 4000m, and pushes the read data to the control data stack 144 or the failure data stack 145.
Then, when the data size of the control data stack 144 reaches the data size registered in the data size counting unit 142, the divided control data A (1/4) to (4) stored in the control data stack 144 are stored. The original control data A before division is restored using A (4/4).
Similarly, when the data size of the fault data stack 145 reaches the default data size of the fault data, fault data E0 (1/2) and E0 (2/2) stored in the fault data stack 145 ) To restore the original failure data E0 before the division.

Next, operation examples of the frame reception unit 102 and the reception data distribution unit 103 will be described with reference to FIG.

First, the frame receiving unit 102 receives a frame from the communication device 200 (step S151), and stores the received frame in a predetermined reception buffer.

Next, the reception data distribution unit 103 checks the frame header (frame type) in the reception buffer and determines the type of the frame (steps S152 and S153).
If the frame type is a control frame or a divided frame, the received data distribution unit 103 transfers the control frame or the divided frame to the control frame buffer unit 112 and the control frame buffer unit 132, and the control frame buffer unit 112 and the control frame buffer The control frame or the divided frame is stored in the unit 132 (step S154).
If the frame type is a fault frame, the reception data distribution unit 103 notifies the transmission determination unit 121 of the reception of the fault data (step S155), and the fault frame is sent to the fault frame buffer unit 111 and the fault frame buffer unit 131. The fault frame is stored in the fault frame buffer unit 111 and the fault frame buffer unit 131 (step S156).

Next, an operation example of the data generation unit 105 will be described with reference to FIG.

When the data is generated, if the generated data is failure data (step S201), the data generation unit 105 notifies the transmission determination unit 121 of the generation of failure data (step S202).
In addition, the data generation unit 105 generates a failure frame by adding a failure frame header to the failure data, transfers the generated failure frame to the failure frame buffer unit 111, and stores the failure frame in the failure frame buffer unit 111 ( Step S203).
On the other hand, if the generated data is control data (step S201), the data generation unit 105 generates a control frame by adding a control frame header to the control data, and transfers the generated control frame to the control frame buffer unit 112. Then, the control frame is stored in the control frame buffer unit 112 (step S204).

Next, an operation example of the transmission frame generation unit 106 will be described with reference to FIGS.

First, when the transmission determination unit 121 in the transmission frame generation unit 106 has not received a notification that failure data has occurred from the reception data distribution unit 103 or the data generation unit 105 (NO in step S301 in FIG. 18), control is performed. It is determined whether or not there is a control frame in the frame buffer unit 112 (step S302).
If there is no control frame in the control frame buffer unit 112 (NO in step S302), the process returns to step S301.
When there is a control frame in the control frame buffer unit 112 (YES in step S302), the order control unit 122 reads data for one word of the control frame from the control frame buffer unit 112 according to an instruction from the transmission determination unit 121. (Step S303).
Next, the order control unit 122 determines the type of the read data (step S304), and if the read data is a control frame header, sets the remaining frame size and the remaining transmittable size in a predetermined storage area. To do.
More specifically, the order control unit 122 sets values obtained by subtracting the size of the frame header from the size described in the frame size in the control frame header as the remaining frame size and the remaining transmittable size.
On the other hand, if the data read in step S303 is a delimiter, the failure data continues after the delimiter, so the order control unit 122 sets the remaining failure size in a predetermined storage area (step S306).
The order control unit 122 sets a default data size of failure data as the remaining failure size.
If the data read in step S303 is neither a control frame header nor a delimiter, the sequence control unit 122 decrements the remaining failure size when the remaining failure size is one word or more (YES in step S307) ( In step S308, the remaining frame size and the remaining transmittable size are decremented (step S309).
On the other hand, when the failure remaining size is 0 (NO in step S307), only the frame remaining size and the transmittable remaining size are decremented (step S309).
Next, the sequence control unit 122 transmits the data read in step S303 to the frame transmission unit 107.

Next, the transmission determining unit 121 checks the values of the remaining frame size and the remaining transmittable size (step S311).
If the remaining frame size is 0 and the transmittable remaining size is 0, or if the remaining frame size is 1 word or more and the transmittable remaining size is 1 word or more, the process returns to step S301.
If the remaining frame size is 0 and the transmittable remaining size is 0, it means that the control data contained in one control frame is transmitted as it is in one control frame without inserting fault data. To do.
If the remaining frame size is 1 word or more and the remaining transmittable size is 1 word or more, part of the control data included in one control frame remains untransmitted, and This means that the data size that can be transmitted remains in the control frame.
On the other hand, if the remaining frame size is 1 word or more and the remaining transmittable size is 0, a transmission process of a divided frame is performed (step S312).
The divided frame transmission process will be described later with reference to FIG.
Note that the remaining frame size is 1 word or more and the remaining transmittable size is 0 because a part of the control data included in one control frame is because a delimiter and failure data are inserted. It means that it was pushed out and could not be transmitted in that control frame.

In step S301, when the transmission determination unit 121 receives a notification that failure data has occurred from the reception data distribution unit 103 or the data generation unit 105 (YES in step S301), the transmission determination unit 121 determines that the remaining size that can be transmitted. It is confirmed whether there is any (step S401 in FIG. 19).
If there is a remaining size that can be transmitted (YES in step S401), the transmission determining unit 121 checks whether there is a remaining failure size (step S402).
If there is a failure remaining size (YES in step S402), it means that there is currently failure data being transmitted, so the transmission of the failure data currently being transmitted is completed before the step of FIG. The failure data notified in S301 is inserted into the control frame.
Note that the state of YES in step S402 corresponds to the state where the failure data E1 has occurred during the transmission of the failure data E0 shown in FIG.
For this reason, the sequence control unit 122 reads out data for one word of the control frame (remaining failure data being transmitted) from the control frame buffer unit 112 in accordance with an instruction from the transmission determination unit 121 (step S403).
Next, the order control unit 122 decrements the remaining frame size, the remaining transmittable size, and the remaining failure size (step S404).
Thereafter, the processes in steps S401 to S404 are repeated until the remaining failure size becomes zero.

When it is determined in step S402 that the remaining failure size is 0 (NO in step S402), the transmission determining unit 121 checks whether there is a sufficient remaining transmittable size for transmitting failure data (FIG. 20). Step S501).
That is, if the remaining transmittable size is equal to or larger than the default data size of the failure data and the delimiter, YES is determined in step S501, and if it is less than the additional value, NO is determined in step S501.
If the remaining transmittable size is sufficient (YES in step S501), the order control unit 122 reads data for one word of the fault frame from the fault frame buffer unit 111 according to an instruction from the transmission determination unit 121, and reads the read data. It outputs to the frame transmission part 107 (step S502).
In the first reading from the failure frame buffer unit 111, since the failure frame header is read, the order control unit 122 does not output the read failure frame header to the frame transmission unit 107, but instead uses a delimiter as the frame transmission unit. It outputs to 107.
Next, the order control unit 122 decrements the remaining size that can be transmitted (step S503).
Next, the transmission determination unit 121 confirms whether or not all of the failure data has been output to the frame transmission unit 107 (step S504). If there is failure data that has not been output, the processing of steps S502 to S504 is repeated. It is.
If all the failure data has been output to the frame transmission unit 107, the process proceeds to step S311 in FIG.
Since the transmission determining unit 121 stores the default data size of failure data, it can determine whether or not the order control unit 122 has read all of the failure data from the failure frame buffer unit 111.

If it is determined in step S501 that the remaining size that can be transmitted is not sufficient (NO in step S501), the failure data notified in step S301 in FIG. 18 cannot be transmitted in the current control frame. After the frame transmission is completed, it is transmitted as a fault frame.
For this reason, after completing the process of transmitting the current control frame in steps S505 to S507, the process of transmitting a fault frame is performed in step S508.
In step S <b> 505, in response to an instruction from the transmission determination unit 121, the order control unit 122 reads data for one word of the control frame from the control frame buffer unit 112 and transmits the read data to the frame transmission unit 107.
Next, in step S506, the order control unit 122 decrements the remaining frame size and the remaining transmittable size.
Next, in step S507, the transmission determining unit 121 confirms the values of the remaining frame size and the remaining transmittable size.
If the remaining frame size is 0 and the remaining transmittable size is 0, a failure frame transmission process is performed in step S508.
The failure frame transmission process will be described later with reference to FIG.
When the failure frame transmission process ends, the process proceeds to step S301 in FIG.
If the remaining frame size is 1 word or more and the remaining transmittable size is 1 word or more, the process returns to step S505.
If the remaining frame size is 1 word or more and the remaining transmittable size is 0, a failure frame transmission process is performed in step S509, and a divided frame transmission process is performed in step S510.
The divided frame transmission process will be described later with reference to FIG.
After completion of the divided frame transmission process, a fault frame transmission process is performed in step S508.

Next, when it is determined in step S401 of FIG. 19 that there is no remaining size that can be transmitted (NO in step S401), the transmission of one control frame for the data size has been completed. The failure data notified in S301 is not inserted into the control frame but transmitted as a failure frame.
Here, the transmission determining unit 121 confirms whether or not there is a remaining frame size (step S405). If there is no remaining frame size, a transmission process of a faulty frame is performed in step S508 (step S406).
On the other hand, if there is a remaining frame size, there is control data or failure data that was included in one control frame but could not be transmitted in that control frame. Therefore, in step S407, a failure frame transmission process is performed. In step S408, a divided frame transmission process is performed.

Next, with reference to FIG. 21, the transmission process of the divided frames will be described.

First, the transmission determining unit 121 generates a divided frame header, and the order control unit 122 outputs the divided frame header to the frame transmitting unit 107 (step S601).
Next, in response to an instruction from the transmission determination unit 121, the order control unit 122 reads data for one word of the control frame from the control frame buffer unit 112, and outputs the read data to the frame transmission unit 107 (step S602).
At this time, the sequence control unit 122 decrements the remaining frame size.
Next, the transmission determining unit 121 checks whether or not there is a remaining frame size (step S603). If there is a remaining frame size, the processing of steps S601 to S603 is performed until the remaining frame size becomes zero. Repeated.
If the remaining frame size becomes 0, all the pushed-out data has been transmitted in divided frames.

Next, the fault frame transmission process will be described with reference to FIG.

First, in response to an instruction from the transmission determination unit 121, the order control unit 122 reads data for one word of a fault frame from the fault frame buffer unit 111, and transmits the read data to the frame transmission unit 107 (step S701).
Next, the transmission determination unit 121 confirms whether or not all of the failure data has been output to the frame transmission unit 107 (step S702). If there is failure data that has not been output, the processing of steps S701 and S702 is repeated. It is.
As described above, since the transmission determining unit 121 stores the default data size of the failure data, it is determined whether the order control unit 122 has read all of the failure data from the failure frame buffer unit 111. Can do.

As described above, according to the present embodiment, when the communication apparatus 200 performs a failure notification, the communication apparatus 100 interrupts the failure notification in the control frame, so that the period of the control communication remains short. Time can be shortened.

Embodiment 2. FIG.
In the present embodiment, a communication device 100 having a configuration different from that of the first embodiment will be described.
Communication device 100 according to the present embodiment is different in configuration from that of the first embodiment, and the operation procedure is different from that shown in the first embodiment, but the basic operation principle is the same. is there.
That is, also in this embodiment, when trouble data occurs during transmission of the control frame, the trouble data is inserted into the control frame and transmitted, and the data pushed out by the trouble data insertion is divided into frames. Then, the control frame is transmitted.
Therefore, also in the present embodiment, the control frame and the divided frame are transmitted in the form shown in FIGS.
Also in the present embodiment, data is restored based on the principle shown in FIG.

FIG. 23 shows a configuration example of the communication apparatus 100 according to the present embodiment.
Hereinafter, the communication device 100 is also referred to as its own device.
The communication device 200 and the communication device 300 also have the configuration example shown in FIG.

The reception port 800 receives the frame 1000 from the communication device 200 and outputs it to the reception data distribution device 801 word by word.

The received data distribution device 801 analyzes the received data and, according to the received contents, the header buffer 803, the reconstruction buffer 805, the relay data buffer 811, the relay header buffer 804, the relay failure buffer 812, the relay failure header buffer 808, the external Predetermined information is sent to the input / output device 813 (hereinafter also referred to as CPU).

Specifically, the reception data distribution device 801 stores the size of the frame header in advance, stores the size of the failure data in advance, stores the size of the failure frame in advance, and sets the size of the delimiter in advance. I keep it.
The reception data distribution device 801 calculates the frame data size of the control frame (hereinafter referred to as control data size) by subtracting the frame header size from the frame size indicated by the control frame header.
The reception data distribution device 801 calculates the frame data size of the divided frame (hereinafter referred to as the divided data size) by subtracting the size of the frame header 1010 from the frame size 1012 of the divided frame headers 4010 and 5010.
The reception data distribution device 801 calculates the frame data size of the fault frame (hereinafter referred to as fault data size) by subtracting the size of the frame header 1010 from the frame size 1012 of the fault frame header 6010.

The reception data distribution device 801 requests the reception counter 802 to clear the frame from the reception port 800 when the means for detecting the head of the frame 1000 (not shown in FIG. 23) detects the head of the frame 1000. 1000 is received word by word.

The reception counter 802 measures the frame header size in response to a request from the reception data distribution device 801. When the reception counter 802 is less than the size of the frame header 1010, the reception data distribution device 801 receives the received 1 Write a word to the header buffer 803.

If the reception counter 802 has the size of the frame header 1010 and the header buffer 803 stores the control frame header, the reception data distribution device 801 reconstructs the control frame header from the relay header buffer 804. Write to the buffer 805 and write the control data size to the relay failure remaining size counter 809 and the reconfiguration counter 807.
If the header buffer 803 stores the divided frame headers 4010 and 5010, the reception data distribution device 801 writes the divided frame header to the relay header buffer 804 and sets the divided data size to the relay remaining size counter 806. Write.
If the failure buffer header 6010 is stored in the header buffer 803, the reception data distribution device 801 writes the failure frame header in the relay failure header buffer 808, and stores the control data size in the relay failure remaining size counter 809. When the interrupt counter 810 is 0, the internal reception interrupt flag is invalidated. When the interrupt counter 810 is other than 0, the internal reception interrupt flag is validated.

The reception counter 802 is larger than the size of the frame header 1010, the reception counter 802 is less than the frame size of the frame header 1010 stored in the header buffer 803, the reception interrupt flag is invalid, and the reception counter 800 has received from the reception port 800 When one word is not a delimiter, the received data distribution device 801 performs the following operation.
That is, when the above condition is satisfied, if the header buffer 803 stores the control frame header or the divided frame header, the reception data distribution device 801 converts one word received from the reception port 800 into relay data. Write to the buffer 811 and the reconstruction buffer 805, and request the decrement to the reconstruction counter 807.
On the other hand, when the above condition is satisfied, if the failure frame header 6010 is stored in the header buffer 803, the reception data distribution device 801 stores one word received from the reception port 800 in the relay failure buffer 812. Write.

Also, the reception counter 802 is larger than the size of the frame header 1010, the reception counter 802 is less than the frame size 1012 of the frame header 1010 stored in the header buffer 803, the reception interrupt flag is invalid, and the reception port 800 The received data distribution device 801 writes the size of the fault data in the interrupt counter 810 and writes the fault frame type and the fault frame size in the relay fault header buffer 808 when one word received from the delimiter 3030 is received.

Also, when the interrupt flag is valid, the reception data distribution device 801 writes one word received from the reception port 800 to the relay failure buffer 812 and requests the interrupt counter 810 to decrement.

When the reception counter 802 is larger than the frame header size and equal to the frame size of the frame header stored in the header buffer 803, the reception data distribution device 801 requests the reception counter 802 to clear.
When the value of the reconstruction counter 807 is 0, the reception data distribution device 801 outputs a control data reception completion signal to the external output device.

The reception counter 802 mainly measures the number of received data words in response to a request from the reception data distribution device 801.

Details of the operation of the reception counter 802 will be described.
The reception counter 802 clears the internal value when requested by the reception data distribution device 801.
The reception counter 802 increments an internal value when requested by the reception data distribution device 801.
The reception counter 802 outputs an internal value when read from the reception data distribution device 801.

The header buffer 803 stores the frame header 1010 of the received frame.

Details of the operation of the header buffer 803 will be described.
The header buffer 803 stores the frame header when the frame header is written from the reception data distribution device 801.
The header buffer 803 outputs a frame header to the reception data distribution device 801 when read by the reception data distribution device 801.
The header buffer 803 outputs a frame header to the external input / output device 813 when read to the external input / output device 813.

The relay header buffer 804 stores the received control frame header, and outputs the information of the control frame headers 2010 and 3010 to the relay division header generation device 814 and the relay interrupt availability determination device 815.

Details of the operation of the relay header buffer 804 will be described.
The relay header buffer 804 stores the control frame headers 2010 and 3010 when the control frame headers 2010 and 3010 are written from the reception data distribution device 801.
The relay header buffer 804 outputs the control frame headers 2010 and 3010 to the relay division header generation device 814 when read to the relay division header generation device 814.
The relay header buffer 804 outputs the control frame headers 2010 and 3010 to the relay interrupt enable / disable determining device 815 when read by the relay interrupt enable / disable determining device 815.
Further, the relay header buffer 804 outputs the control frame headers 2010 and 3010 to the transmission data selection device 816 when read by the transmission data selection device 816.

The reconfiguration buffer 805 stores the pre-failure split control data 3020, the post-failure split control data 3050, and the split control data 4020 pushed out of the frame, and restores the control data 2.

Details of the operation of the reconfiguration buffer 805 will be described.
The reconfiguration buffer 805 stores the control data when the control data is written from the reception data distribution device 801, and outputs the control data to the external input / output device 813 when read by the external input / output device 813.

The relay remaining size counter 806 measures the number of untransmitted words in the control frame or divided frame to be relayed.

Details of the operation of the relay remaining size counter 806 will be described.
When the control data size is written in the reception data distribution device 801, the relay remaining size counter 806 sets the control data size as a count value.
The relay remaining size counter 806 sets the relay data size as a count value when the relay data size is written in the reception data distribution device 801.
The relay remaining size counter 806 decrements the count value when requested by the transmission data selection device 816.
Further, the relay remaining size counter 806 outputs the count value to the relay division header generation device 814 when read to the relay division header generation device 814.
The relay remaining size counter 806 outputs the count value to the relay interrupt enable / disable determining device 815 when read by the relay interrupt enable / disable determining device 815.

The reconfiguration counter 807 measures the number of unreceived control data and detects the completion of reception of control data.

Details of the operation of the reconstruction counter 807 will be described.
The reconfiguration counter 807 clears the internal value when requested by the reception data distribution device 801.
The reconfiguration counter 807 decrements the count value when requested by the reception data distribution device 801 and outputs an internal value when requested by the reception data distribution device 801.

The relay failure header buffer 808 stores the received failure frame header 6010 and outputs it to the transmission data selection device.

Details of the operation of the relay failure header buffer 808 will be described.
The relay failure header buffer 808 stores a failure frame header 6010 when written from the reception data distribution device 801.
Further, the relay failure header buffer 808 outputs a failure frame header 6010 to the transmission data selection device 816 when read by the transmission data selection device 816.

The relay failure remaining size counter 809 measures the number of untransmitted words of the received failure data in response to a request from the transmission data selection device 816.

Details of the operation of the relay failure remaining size counter 809 will be described.
The relay failure remaining size counter 809 sets the failure data size as a count value when written from the reception data distribution device 801.
The relay failure remaining size counter 809 decrements the count value when requested by the transmission data selection device 816.

The interrupt counter 810 measures the number of received words of failure data included in the control frame in response to a request from the received data distribution device 801.

Details of the operation of the interrupt counter 810 will be described.
When requested by the reception data distribution device 801, the interrupt counter 810 sets an internal value to a predetermined failure data size.
The interrupt counter 810 decrements the internal value when requested by the reception data distribution device 801.
The interrupt counter 810 outputs an internal value to the reception data distribution device 801 when read from the reception data distribution device 801.

The relay data buffer 811 stores the received control frame and frame data 1020 of the divided frames, and outputs them to the transmission data selection device 816.

Details of the operation of the relay data buffer 811 will be described.
The relay data buffer 811 stores the frame data 1020 of the control frame or the frame data 1020 of the divided frame when written from the reception data distribution device 801.
The relay data buffer 811 outputs the frame data 1020 of the control frame or the frame data 1020 of the divided frame to the transmission data selection device 816 when read by the transmission data selection device 816.

The relay failure buffer 812 stores the received failure data 28 and outputs it to the transmission data selection device 816.

Details of the operation of the relay failure buffer 812 will be described.
The relay failure buffer 812 stores failure data when written from the reception data distribution device 801.
Further, the relay failure buffer 812 outputs failure data to the transmission data selection device 816 when read by the transmission data selection device 816.

The external input / output device 813 (CPU) writes a frame to 817 to 822 at an arbitrary timing, and reads data from the reconfiguration buffer 805 at an arbitrary timing.

Details of the operation of the external input / output device 813 will be described.
The external input / output device 813 writes the control frame header 2010 in its own device header buffer 817 at an arbitrary timing.
Also, the external input / output device 813 writes the value of the control frame size in the own device remaining size counter 818 at an arbitrary timing.
Further, the external input / output device 813 writes the frame data 1020 of the control frame in its own device data buffer 819 at an arbitrary timing.
Further, the external input / output device 813 writes the failure frame header 6010 in the own device failure header buffer 820 at an arbitrary timing.
In addition, the external input / output device 813 writes the value of the frame size of the fault frame 6000 in its own fault remaining size counter 821 at an arbitrary timing.
Also, the external input / output device 813 writes the failure frame 6000 data in the own device failure buffer 822 at an arbitrary timing.
The external input / output device 813 reads data from the reconfiguration buffer 805 at an arbitrary timing.

When the relay frame (the frame received from the communication device 200) is divided, the relay divided header generation device 814 generates divided frame headers 4010 and 5010 and outputs them to the transmission data selection device 816.

Details of the operation of the relay division header generation device 814 will be described.
The relay division header generation device 814 outputs the division frame header to the transmission data selection device 816 when requested by the transmission data selection device 816.
In the divided frame header output from the relay divided header generation device 814, the frame size indicates a value read from the relay remaining size counter 806, and the frame type indicates a divided frame.

The relay interrupt availability determination device 815 outputs to the transmission data selection device 816 whether or not failure data can be interrupted in the relay frame being transmitted.

Details of the operation of the relay interrupt availability determination device 815 will be described.
The relay interrupt availability determination device 815 reads the count value from the relay remaining size counter 806 when requested by the transmission data selection device 816.
The relay interrupt availability determination device 815 then determines the count value.
(N is a natural number) and
{(Delimiter size) + (Failure data size)} * (n) ≦ (Count value above)
If there is n satisfying the relationship, valid is output to the transmission data selection device 816, otherwise invalid is output.

The transmission data selection device 816 has a relay failure header buffer 808, a relay failure buffer 812, an own device failure header buffer 820, an own device failure buffer 822, a relay header buffer 804, a relay data buffer 811, and an own device header buffer according to priority. 817, the data read from any one of the own device data buffer 819 and the delimiter output device 823 is output to the transmission port 824.

Details of the operation of the transmission data selection device 816 will be described.

The transmission data selection device 816 stores the size of the frame header 1010 in advance, stores the size of the failure data in advance, and requests the transmission counter 825 to increment when outputting one word to the transmission port 824.
And the transmission data selection apparatus 816 performs the state transition shown below.
Of the various states shown below, the “relay failure state” is a state in which a failure frame received from the communication device 200 is transmitted.
The “own device transmission state” is a state in which a control frame is transmitted from the external input / output device 813 of the communication device 100 (own device).
"Own device own device status" refers to failure data from the external input / output device 813 of the communication device 100 (own device) during transmission of a control frame from the external input / output device 813 of the communication device 100 (own device). It is in a state to interrupt and transmit.
The “own device relay state” is a state in which the failure data received from the communication device 200 is interrupted and transmitted during the transmission of the control frame from the external input / output device 813 of the communication device 100 (own device).
The “own device split state” is the control data included in the control frame from the external input / output device 813 of the communication device 100 (self device), and the control data pushed out by interruption of the fault data is divided. This is a state in which the frame is transmitted.
The “own device failure state” is a state in which a failure frame is transmitted from the external input / output device 813 of the communication device 100 (self device).
The “relay transmission state” is a state in which a control frame received from the communication apparatus 200 is transmitted.
The “relay own device state” is a state in which failure data from the external input / output device 813 of the communication device 100 (own device) is interrupted and transmitted during the transmission of the control frame received from the communication device 200.
The “relay relay state” is a state in which the failure data received from the communication device 200 is interrupted and transmitted while the control frame received from the communication device 200 is being transmitted.
The “relay division state” is a state in which the control data included in the control frame received from the communication apparatus 200 and pushed out by interruption of the failure data is transmitted in the divided frame.
The state transition pattern is as shown in FIG.
Details of the state transition of the transmission data selection device 816 will be described below.

When waiting for transmission,
If the value of the relay failure remaining size counter 809 is 1 or more, transition to the relay failure state,
If the value of the own device remaining size counter 818 is 1 or more, the state transits to the own device transmission state.

It is in its own device transmission state, and
The value of the relay failure remaining size counter 809 is 0, and
The value of the own device failure remaining size counter 821 is 1 or more, and
When the output of the own device interruptability determination device 826 is valid,
Transitions to its own device state.

It is in its own device transmission state, and
The value of the relay failure remaining size counter 809 is 1 or more, and
The value of the own device failure remaining size counter 821 is 0, and
When the output of the relay interrupt availability determination device 815 is valid,
Transition to the local device relay state.

It is in its own device transmission state, and
The value of the transmission counter 825 is equal to the frame size 1012 of its own device header buffer 817, and
When the value of the own device remaining size counter 818 is 0,
Transition to the transmission standby state.

It is in its own device transmission state, and
The value of the transmission counter 825 is equal to the frame size 1012 of its own device header buffer 817, and
When the value of the device remaining size counter 818 is 1 or more,
Transition to its own device split state.

When the own device is in the own device state and the value of the own device failure remaining size counter 821 is 0,
Transition to the own device transmission state.

When it is in its own device relay state and the value of the relay failure remaining size counter 809 is 0,
Transition to the own device transmission state.

It is in its own device split state, and
When the value of the own device remaining size counter 818 is 0,
Transition to the transmission standby state.

When the own device failure state and the value of the own device failure remaining size counter 821 is 0,
Transition to the transmission standby state.

Relay transmission status, and
The value of the relay failure remaining size counter 809 is 0, and
The value of the own device failure remaining size counter 821 is 1 or more, and
When the output of the relay interrupt availability determination device 815 is valid,
Transition to the relay local device state.

Relay transmission status, and
The value of the relay failure remaining size counter 809 is 1 or more, and
When the output of the relay interrupt availability determination device 815 is valid,
Transition to relay relay state.

Relay transmission status, and
The value of the transmission counter 825 is equal to the frame size 1012 of the relay header buffer 804, and
When the value of the relay remaining size counter 806 is 0,
Transition to the transmission standby state.

Relay transmission status, and
The value of the transmission counter 825 is equal to the frame size 1012 of the relay header buffer 804, and
When the value of the relay remaining size counter 806 is 1 or more,
Transition to the relay split state.

When it is in the relay own device state and the value of the own device failure remaining size counter 821 is 0,
Transition to the relay transmission state.

When in the relay relay state and the value of the relay failure remaining size counter 809 is 0,
Transition to the relay transmission state.

It is in a relay split state, and
When the value of the relay remaining size counter 806 is 0,
Transition to the transmission standby state.

Relay failure condition, and
When the value of the relay failure remaining size counter 809 is 0,
Transition to the transmission standby state.

It is in its own device transmission state, and
When the value of the transmission counter 825 is less than the size of the frame header 1010,
Output one word from its own device header buffer 817 to the transmission port 824,
When the value of the transmission counter 825 is equal to or larger than the size of the frame header,
1 word is output from its own device data buffer 819 to the transmission port 824,
Requests a decrement from its own device remaining size counter 818,
When the value of the transmission counter 825 is equal to the frame size 1012 of the own apparatus failure header buffer 820, the transmission counter 825 is requested to be cleared.

It is in its own device relay state, and
When the value of the relay failure remaining size counter 809 is equal to the size of the failure data,

Delimiters

3030 and 5020 are output from the delimiter output device 823 to the transmission port 824,
When the value of the relay failure remaining size counter 809 is smaller than the size of the failure data,
One word is output from the relay failure buffer 812 to the transmission port 824,
A decrement is requested to the relay failure remaining transmission counter 825.

It is in its own device state, and
When the value of the own device failure remaining size counter 821 is equal to the size of the failure data,

Delimiters

3030 and 5020 are output from the delimiter output device 823 to the transmission port 824,
When the value of the own device failure remaining size counter 821 is smaller than the size of the failure data,
1 word is output from the own device failure buffer 822 to the transmission port 824,
Decrement is requested from the own device failure remaining size counter 821.

It is in its own device split state, and
When the value of the transmission counter 825 is less than the size of the frame header 1010,
1 word is output from its own device split header generation device 827 to the transmission port 824,
When the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010,
1 word is output from its own device data buffer 819 to the transmission port 824,
Requests a decrement from its own device remaining size counter 818,
When the value of the transmission counter 825 is equal to the frame size 1012 of the own apparatus failure header buffer 820, the transmission counter 825 is requested to be cleared.

It is in its own device failure state, and
When the value of the transmission counter 825 is less than the size of the frame header 1010,
1 word is output from the own device failure header buffer 820 to the transmission port 824,
When the value of the transmission counter 825 is equal to or larger than the size of the frame header,
1 word is output from its own device data buffer 819 to the transmission port 824,
Requests a decrement from its own device remaining size counter 818,
When the value of the transmission counter 825 is equal to the frame size 1012 of the own apparatus failure header buffer 820, the transmission counter 825 is requested to be cleared.

Relay transmission status, and
When the value of the transmission counter 825 is less than the size of the frame header 1010,
1 word is output from the relay header buffer 804 to the transmission port 824,
When the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010,
1 word is output from the relay data buffer 811 to the transmission port 824,
Request decrement from the relay remaining size counter 806,
When the value of the transmission counter 825 is equal to the frame size 1012 of the relay failure header buffer 808, the transmission counter 825 is requested to clear.

It is in a relay relay state, and
When the value of the relay failure remaining size counter 809 is equal to the size of the failure data,
The delimiter is output from the delimiter output device 823 to the transmission port 824,
When the value of the relay failure remaining size counter 809 is smaller than the size of the failure data,
One word is output from the relay failure buffer 812 to the transmission port 824,
A decrement is requested to the relay failure remaining size counter 809.

The relay is in its own device state, and
When the value of the own device failure remaining size counter 821 is equal to the size of the failure data,

Delimiters

3030 and 5020 are output from the delimiter output device 823 to the transmission port 824,
When the value of the own device failure remaining size counter 821 is smaller than the size of the failure data,
One word is output from the own device failure buffer 322 to the transmission port 824,
Decrement is requested from the own device failure remaining size counter 821.

It is in a relay split state, and
When the value of the transmission counter 825 is less than the size of the frame header 1010,
1 word is output from the relay division header generation device 814 to the transmission port 824,
When the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010,
1 word is output from the relay data buffer 811 to the transmission port 824,
Request decrement from the relay remaining size counter 806,
When the value of the transmission counter 825 is equal to the frame size 1012 of the relay failure header buffer 808, the transmission counter 825 is requested to clear.

Relay failure condition, and
When the value of the transmission counter 825 is less than the size of the frame header 1010,
1 word is output from the relay failure header buffer 808 to the transmission port 824,
When the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010,
1 word is output from the relay data buffer 811 to the transmission port 824,
Request decrement from the relay remaining size counter 806,
When the value of the transmission counter 825 is equal to the frame size of the relay failure header buffer 808, the transmission counter 825 is requested to clear.

The own device header buffer 817 stores the control frame header 2010 input from the external input / output device 813 and outputs information of the control frame header 2010 to the transmission data selection device 816.

Details of the operation of the own apparatus header buffer 817 will be described.
The own device header buffer 817 stores the control frame header 2010 when written from the external input / output device 813.
Also, the own device header buffer 817 outputs the control frame header 2010 to the own device divided header generation device 827 when read to the own device division header generation device 827.
Also, the own device header buffer 817 outputs the control frame header 2010 to the own device interrupt enable / disable determining device 826 when read to the own device interrupt enable / disable determining device 826.
Also, the own device header buffer 817 outputs the control frame header 2010 to the transmission data selection device 816 when read by the transmission data selection device 816.

The own device remaining size counter 818 measures the number of untransmitted words in the control frame or divided frame of the own device in response to a request from the transmission data selection device 816.

Details of the operation of the own apparatus remaining size counter 818 will be described.
The own device remaining size counter 818 sets the control data size as a count value when written from the external input / output device 813.
The own device remaining size counter 818 decrements the count value when requested by the transmission data selection device 816.
Also, the own device remaining size counter 818 outputs a count value to the own device divided header generation device 827 when read by the own device division header generation device 827.
Further, the own device remaining size counter 818 outputs a count value to the own device interrupt enable / disable determining device 826 when read to the own device interrupt enable / disable determining device 826.

The own device data buffer 819 stores the frame data 1020 of the control frame among the frames written from the external input / output device 813 and outputs it to the transmission data selection device 816.

Details of the operation of the device data buffer 819 will be described.
The own device data buffer 819 stores the control data when written from the external input / output device 813.
In addition, the local device data buffer 819 outputs control data to the transmission data selection device 816 when read by the transmission data selection device 816.

The own device failure header buffer 820 stores the failure frame header 6010 written from the external input / output device, and outputs it to the transmission data selection device.

Details of the operation of the own device failure header buffer 820 will be described.
The local device failure header buffer 820 stores the failure frame header 6010 when written from the external input / output device 813.
Also, the own device failure header buffer 820 outputs a failure frame header 6010 to the transmission data selection device 816 when read by the transmission data selection device 816.

The own device failure remaining size counter 821 measures the number of untransmitted words of failure data written from the external input / output device in response to a request from the transmission data selection device 816.

Details of the operation of the own device failure remaining size counter 821 will be described.
The own device failure remaining size counter 821 sets the value of the failure data size as a count value when written from the external input / output device 813.
Also, the own device failure remaining size counter 821 decrements the count value when requested by the transmission data selection device 816.
Further, the own device failure remaining size counter 821 outputs a count value to the transmission data selection device 816 when read by the transmission data selection device 816.

The own device failure buffer 822 stores the failure data 28 among the data written from the external input / output device and outputs it to the transmission data selection device 816.

Details of the operation of the own device failure buffer 822 will be described.
The own device failure buffer 822 stores the failure data 28 when written from the external input / output device 813.
Also, the own device failure buffer 822 outputs a failure frame header 6010 to the transmission data selection device 816 when read by the transmission data selection device 816.

The delimiter output device 823 stores the

delimiters

3030 and 5020 in advance, and when read from the transmission data selection device 816, outputs the

delimiters

3030 and 5020 stored in advance to the transmission data selection device 816.

The transmission port 824 receives data one word at a time from the transmission data selection device 816 and transmits a frame to the communication device 300.

The transmission counter 825 measures the number of words of transmission data in response to a request from the transmission data selection device 816.

Details of the operation of the transmission counter 825 will be described.
When receiving a request from the transmission data selection device 816, the transmission counter 825 clears the internal value.
The transmission counter 825 increments an internal value when receiving a request from the transmission data selection device 816.
Also, the transmission counter 825 outputs an internal value to the transmission data selection device 816 when read from the transmission data selection device 816.

The own device interrupt availability determination device 826 outputs to the transmission data selection device 816 whether or not failure data can be interrupted in the own device frame (frame generated in the communication device 100) being transmitted.

When requested by the transmission data selection device 816, the own device interrupt availability determination device 826 reads the count value from the own device remaining size counter 818.
In addition, the self-device interrupt enable / disable determination device 826 determines the count value.
(N is a natural number) and
{(Delimiter size) + (Failure data size)} * (n) ≦ (Count value above)
If n exists that satisfies the relationship
Valid is output to the transmission data selection device 816, otherwise invalid is output.

The own device division header generation device 827 generates divided frame headers 4010 and 5010 when the own device frame is divided, and outputs it to the transmission data selection device 816.

When requested by the transmission data selection device 816, the own device division header generation device 827 outputs the divided frame header to the transmission data selection device 816.
In the divided frame header output from the own device divided header generation device 827, the frame size 1012 indicates a value read from the own device remaining size counter 818, and the frame type 1011 indicates a divided frame.

Next, the operation will be described.
FIG. 24 is a flowchart showing an operation procedure of the communication apparatus 100.

As shown in FIG. 24, the communication device 100 is provided with a plurality of states, and state transition is performed based on the reception status of frames, the occurrence status of failure data, and the like.
The state transition pattern at the time of frame reception is as shown in FIG.
The state transition pattern at the time of frame transmission is as shown in FIG.

Next, the flowchart of FIG. 24 will be described.
In the flowchart of FIG. 24, the communication apparatus 100 corresponds to the operation for each operation clock.
That is, each process of S2, S11, S20, S26, S30, S39, S54, S58, S61, S95, S67, S82, S86, S89, S101, and S111 is an operation performed with one clock.

First, the reception data distribution device 801 confirms the state of the reception data distribution device 801 (step S1).

In step S1,
When the reception data distribution device 801 is in the header reception state, processing when the reception data distribution device 801 is in the header reception state (denoted as “processing in the header reception state” in the drawing) is performed (step S2). .
Processing when the reception data distribution device 801 is in the header reception state will be described with reference to FIG.

When the reception data distribution device 801 is in the header reception state, the reception data distribution device 801 stores the received one word in the relay header buffer 804 and requests the reception counter 802 to increment (step S3).
Also, the reception data distribution device 801 checks whether the value of the reception counter 802 matches the frame size 1012 of the header buffer 803 (step S4).

In step S4, when the value of the reception counter 802 matches the frame size 1012 of the header buffer 803, the reception data distribution device 801 checks whether the frame type 1011 of the header buffer 803 indicates a faulty frame (step S5). ).

In step S5, when the frame type 1011 of the header buffer 803 indicates a failure frame, the received data distribution device 801 checks whether the frame type 1011 of the header buffer 803 indicates a control frame (step S6).

In step S6, when the frame type 1011 of the header buffer 803 indicates a control frame, the reception data distribution device 801 clears the reconfiguration buffer 805 and sets the value of the frame size 1012 of the header buffer 803 in the reconfiguration counter 807. (Step S7).

Also, the reception data distribution device 801 reads the frame header 1010 from the header buffer 803 and writes it in the relay header buffer 804.
Also, the reception data distribution device 801 sets the value of the frame size 1012 of the header buffer 803 in the relay remaining size counter 806, and transitions to the control reception state (step S8).
This completes the processing when the received data distribution device 801 is in the header reception state.

In step S6, when the frame type 1011 of the header buffer 803 does not indicate a control frame, the reception data distribution device 801 checks whether the frame type 1011 of the header buffer 803 is a divided frame (step S9).

In step S9, when the frame type 1011 of the header buffer 803 indicates a divided frame, the reception data distribution device 801 performs the process of step S8.

In step S9, when the frame type 1011 of the header buffer 803 does not indicate a divided frame, the processing when the reception data distribution device 801 is in the header reception state ends.

In step S5, when the frame type 1011 of the header buffer 803 does not indicate a failure frame, the reception data distribution device 801 reads the frame header from the header buffer 803 and writes it in the relay failure header buffer 808.
Also, the reception data distribution device 801 writes the size of the frame data to the relay failure remaining size counter 809, and transitions to the failure reception state (step S10).

When the processing when the reception data distribution device 801 is in the header reception state is finished, the output processing of the external input / output device 813 (step S106) is performed.
Details of the output processing (step S106) of the external input / output device 813 will be described later with reference to FIG.

Next, processing when the reception data distribution device 801 is in the control reception state (in the drawing, expressed as “processing in the control reception state”) will be described with reference to FIG.

First, the received data distribution device 801 checks whether one word received from the communication device 200 is other than the delimiter 5020 (step S12).

In step S12, when the received data distribution device 801 receives one word other than the delimiter 5020 from the communication device 200, the received data distribution device 801 writes the received one word in the reconfiguration buffer 805, and decrements the reconfiguration counter 807. Is requested (step S13).
Also, the received data distribution device 801 checks whether the value of the reconfiguration counter 807 is 1 or more (step S14).

In step S14, when the reconfiguration counter 807 has a value of 1 or more, the reception data distribution device 801 writes one word received from the communication device 200 in the relay data buffer 811 and requests the reception counter 802 to increment (step S14). S15).
Also, the reception data distribution device 801 confirms whether the value of the reception counter 802 is equal to the value of the frame size 1012 of the header buffer 803 (step S16).

In step S16, when the value of the reception counter 802 is equal to the value of the frame size 1012 of the header buffer 803, the reception data distribution device 801 transitions to a reception standby state (step S17).
Also, the reception data distribution device 801 requests the reception counter 802 to clear, and ends the process when the reception data distribution device 801 is in the control reception state.

In step S16, when the value of the reception counter 802 is different from the value of the frame size 1012 of the header buffer 803, the processing when the reception data distribution device 801 is in the control reception state ends.

In step S14, when the value of the reconstruction counter 807 is 0, the reception data distribution device 801 outputs an interrupt indicating reception of a control frame to the external input / output device 813 (step S18), and performs the processing from step S15. To do.

In step S12, when one word received by the reception data distribution device 801 from the communication device 200 is the delimiter 5020, the reception data distribution device 801 reads the frame header 1010 from the header buffer 803 and writes it into the relay failure buffer 812, and interrupt failure occurs. The process transits to the reception state (step S19), and the process when the reception data distribution device 801 is in the control reception state is terminated.

Next, processing when the reception data distribution device 801 is in the interrupt failure reception state (denoted as “processing in the interrupt failure reception state” in the drawing) will be described with reference to FIG.

First, the reception data distribution device 801 writes one word received from the communication device 200 to the relay failure buffer 812 (step S21), requests the interrupt counter 810 to increment, and requests the reception counter 802 to increment (step S21). .
Next, the reception data distribution device 801 confirms whether the value of the interrupt counter 810 is equal to a predetermined size of failure data (step S22).

In step S22, when the value of the interrupt counter 810 is predetermined and equal to the size of the failure data, the reception data distribution device 801 checks whether the value of the reception counter 802 is equal to the frame size 1012 of the header buffer 803 ( Step S23).

In step S23, when the value of the reception counter 802 is equal to the value of the frame size 1012 of the header buffer 803, the reception data distribution device 801 transitions to the reception standby state (step S24), and processing when it is in the interrupt failure reception state Exit.

In step S23, when the value of the reception data distribution device 801 is different from the value of the frame size 1012 of the header buffer 803, the reception data distribution device 801 transits to the control reception state (step S25).

In step S22, when the value of the interrupt counter 810 is predetermined and different from the size of the fault data, the process in the interrupt fault reception state is ended.

Next, processing when the received data distribution device 801 is in the fault reception state (in the drawing, expressed as “processing in fault reception state”) will be described with reference to FIG.

First, the reception data distribution device 801 writes one word received from the communication device 200 in the relay failure buffer 812, and requests the reception counter 802 to increment (step S26).
Also, the reception data distribution device 801 confirms whether the value of the reception counter 802 is equal to the value of the frame size 1012 of the header buffer 803 (step S27).

In step S27, when the value of the reception counter 802 is equal to the value of the frame size 1012 of the header buffer 803, the reception data distribution device 801 requests the reception counter 802 to clear, and the relay failure buffer 812 receives from the communication device 200. One word is written, transition to the reception standby state (step S28), and the processing when the reception data distribution device 801 is in the fault reception state is terminated.

In step S27, when the value of the reception counter 802 is different from the value of the frame size 1012 of the header buffer 803, the reception data distribution device 801 transits to the reception standby state, and the reception data distribution device 801 is in the failure reception state. The process ends.

Next, processing when the transmission data selection device 816 is in the transmission standby state (in the drawing, expressed as “processing in transmission standby state”) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the relay failure remaining size counter 809 is 0 (step S31).

In step S31, when the value of the relay failure remaining size counter 809 is 0, the transmission data selection device 816 checks whether the value of the own device failure remaining size counter 821 is 0 (step S32).

In step S32, when the value of the own device failure remaining size counter 821 is 0, the transmission data selection device 816 checks whether the value of the relay remaining size counter 806 is 0 (step S33).

In step S33, when the value of the relay remaining size counter 806 is 0, the transmission data selection device 816 checks whether the value of its own device remaining size counter 818 is 0 (step S34).

In step S34, when the value of the own device remaining size counter 818 is 0, the transmission data selection device 816 transitions to its own device transmission state (step S35), and performs processing when the transmission data selection device 816 is in the transmission standby state. finish.

In step S34, when the value of the own device remaining size counter 818 is other than 0, the processing when the transmission data selection device 816 is in the transmission standby state is terminated.

In step S33, when the value of the remaining relay size counter 806 is other than 0, the transmission data selection device 816 transits to the relay state (step S36), and the processing when the transmission data selection device 816 is in the transmission standby state is terminated. .

In step S32, when the value of the own device failure remaining size counter 821 is other than 0, the transmission data selection device 816 transits to the own device failure state (step S37), and the transmission data selection device 816 is in the transmission standby state. The process ends.

In step S31, when the value of the relay failure remaining size counter 809 is other than 0, the transmission data selection device 816 transits to the relay failure notification state (step S38), and the transmission data selection device 816 is in the transmission standby state. The process ends.

Processing when the transmission data selection device 816 is in its own device transmission state (denoted as “processing in its own device transmission state” in the drawing) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the transmission counter 825 is equal to or smaller than the size of the frame header 1010 (step S40).

In step S40, when the value of the transmission counter 825 is equal to or smaller than the size of the frame header 1010, the transmission data selection device 816 outputs one word from the own device header buffer 817 to the transmission port 824 and requests the transmission counter 825 to increment. Then, the processing when the transmission data selection device 816 is in its own device transmission state is terminated (step S41).

In step S40, when the value of the transmission counter 825 is larger than the size of the frame header 1010, the transmission data selection device 816 checks whether the value of the relay failure remaining size counter 809 is 0 (step S42).

In step S42, the transmission data selection device 816 checks whether the value of the own device failure remaining size counter 821 is 0 (step S43).

In step S43, when the value of the own device failure remaining size counter 821 is 0, the transmission data selection device 816 checks whether the value of the transmission counter 825 is different from the value of the frame size 1012 of the own device header buffer 817 (step S44). ).

In step S44, when the value of the transmission counter 825 is different from the value of the frame size 1012 of the own apparatus header buffer 817, the transmission data selection apparatus 816 outputs one word from the own apparatus data buffer 819 to the transmission port 824, Decrement is requested from the remaining size counter 818 and increment is requested from the transmission counter 825 (step S45), and the processing when the transmission data selection device 816 is in its own device transmission state is terminated.

In step S44, when the value of the transmission counter 825 is equal to the value of the frame size 1012 of the own device header buffer 817, the transmission data selection device 816 requests the transmission counter 825 to clear (step S46), and the own device remaining size counter. It is checked whether the value 818 is 0 (step S47).

In step S47, when the value of the own device remaining size counter 818 is 0, the transmission data selection device 816 requests the transmission counter 825 to clear, transitions to a transmission standby state (step S48), and the transmission data selection device 816 The processing in the local device transmission state is terminated.

In step S48, when the value of the own device remaining size counter 818 is other than 0, the transmission data selection device 816 transits to the own device division state (step S49), and the transmission data selection device 816 is in the own device transmission state. The process ends.

In step S43, when the value of the own device failure remaining size counter 821 is not 0, the transmission data selection device 816 confirms the output of the own device interruptability determination device 826 (step S50).

In step S50, when the output of the own device interruptability determination device 826 is not valid, the transmission data selection device 816 performs processing from step S44.

In step S50, when the output of the own device interrupt availability determination device 826 is valid, the transmission data selection device 816 outputs the delimiter from the delimiter output device 823 to the transmission port 824, and transits to the own device own device interrupt state ( Step S51), the processing when the transmission data selection device 816 is in its own device transmission state is terminated.

In step S42, when the value of the relay failure remaining transmission counter 825 is not 0, the transmission data selection device 816 confirms the output of the own device interruptability determination device 826 (step S52).

In step S52, when the output of the own device interruptability determination device 826 is invalid, the transmission data selection device 816 performs processing from step S43.

In step S52, when the output of the own device interrupt availability determination device 826 is valid, the transmission data selection device 816 outputs the

delimiters

3030 and 5020 from the delimiter output device 823 to the transmission port 824, and transitions to the own device relay interrupt state. (Step S53).

Next, processing when the transmission data selection device 816 is in its own device relay state (in the drawing, expressed as “processing in its own device relay state”) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the relay failure remaining size counter 809 is 0 or more (step S55).

In step S55, when the value of the relay failure remaining size counter 809 is 0 or more, the transmission data selection device 816 outputs one word from the relay failure buffer 812 to the transmission port 824, requests the transmission counter 825 to increment, The relay failure remaining transmission counter 825 is requested to decrement (step S56), and the processing when the transmission data selection device 816 is in its own device relay state is terminated.

When the value of the relay failure remaining size counter 809 is 0 in step S56, the transmission data selection device 816 transitions to its own device transmission state (step S57), and when the transmission data selection device 816 is in its own device relay state. Terminate the process.

Next, processing when the transmission data selection device 816 is in its own device state (denoted as “processing in its own device state” in the drawing) will be described with reference to FIG.

First, the transmission data selection device 816 confirms whether the value of its own device failure remaining size counter 821 is 0 or more (step S59).

In step S59, when the value of the own device failure remaining size counter 821 is 0 or more, the transmission data selection device 816 outputs one word from the own device failure buffer 822 to the transmission port 824, and requests the transmission counter 825 to increment. Then, the own device failure remaining size counter 821 is requested to decrement (step S60), and the processing when the transmission data selecting device 816 is in the own device own device state is terminated.

In step S59, when the value of the own device failure remaining size counter 821 is 0, the transmission data selection device 816 transits to the own device transmission state (step S57), and the transmission data selection device 816 is in the own device own device state. The processing at a certain time is terminated.

Next, processing when the transmission data selection device 816 is in its own device division state (in the drawing, expressed as “processing in own device division state”) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the transmission counter 825 is smaller than the size of the frame header 1010 (step S62).

In step S62, when the value of the transmission counter 825 is smaller than the size of the frame header 1010, the transmission data selection device 816 outputs one word from its own device split header generation device 827 to the transmission port 824, and increments the transmission counter 825. Request (step S63), and the process when the transmission data selection device 816 is in its own device split state is terminated.

In step S62, when the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010, the transmission data selection device 816 checks whether the value of its own device remaining size counter 818 is greater than 0 (step S64).

In step S64, when the value of the own device remaining size counter 818 is larger than 0, the transmission data selection device 816 outputs one word from the own device data buffer 819 to the transmission port 824, and decrements the own device remaining size counter 818. The transmission is requested, the transmission counter 825 is requested to increment (step S65), and the processing when the transmission data selection device 816 is in its own device division state is terminated.

In step S64, when the value of the own device remaining size counter 818 is 0, the transmission data selection device 816 requests the transmission counter 825 to clear, transitions to a transmission standby state (step S66), and the transmission data selection device 816. Terminates the process when is in its own device split state.

Processing when the transmission data selection device 816 is in the relay transmission state (denoted as “processing in the relay transmission state” in the drawing) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the transmission counter 825 is equal to or smaller than the size of the frame header 1010 (step S68).

In step S68, when the value of the transmission counter 825 is equal to or smaller than the size of the frame header 1010, the transmission data selection device 816 outputs one word from the relay header buffer 804 to the transmission port 824, requests the transmission counter 825 to increment, The process when the transmission data selection device 816 is in the relay transmission state is terminated (step S69).

In step S68, when the value of the transmission counter 825 is larger than the size of the frame header 1010, the transmission data selection device 816 checks whether the value of the relay failure remaining size counter 809 is 0 (step S70).

In step S70, the transmission data selection device 816 checks whether the value of the own device failure remaining size counter 821 is 0 (step S71).

In step S71, when the value of the own device failure remaining size counter 821 is 0, the transmission data selection device 816 checks whether the value of the transmission counter 825 is different from the value of the frame size 1012 of the relay header buffer 804 (step S72). .

In step S72, when the value of the transmission counter 825 is different from the value of the frame size 1012 of the relay header buffer 804, the transmission data selection device 816 outputs one word from the relay data buffer 811 to the transmission port 824, and the relay remaining size counter. Decrement is requested to 806, increment is requested to the transmission counter 825 (step S73), and the process when the transmission data selection device 816 is in the relay transmission state is terminated.

In step S72, when the value of the transmission counter 825 is equal to the value of the frame size 1012 of the relay header buffer 804, the transmission data selection device 816 requests the transmission counter 825 to clear (step S74). It is checked whether the value is 0 (step S75).

In step S75, when the value of the relay remaining size counter 806 is 0, the transmission data selection device 816 requests the transmission counter 825 to clear, transitions to a transmission standby state (step S76), and the transmission data selection device 816 performs relay transmission. The process when it is in a state is terminated.

In step S75, when the value of the remaining relay size counter 806 is other than 0, the transmission data selection device 816 transitions to the relay division state (step S77), and performs processing when the transmission data selection device 816 is in the relay transmission state. finish.

In step S71, when the value of the own device failure remaining size counter 821 is not 0, the transmission data selection device 816 confirms the output of the relay interrupt availability determination device 815 (step S78).

In step S78, when the output of the relay interrupt availability determination device 815 is not valid, the transmission data selection device 816 performs processing from step S72.

In step S78, when the output of the relay interrupt availability determination device 815 is valid, the transmission data selection device 816 outputs the delimiter 3030 from the delimiter output device 823 to the transmission port 824, and transits to the relay own device interrupt state (step S78). S79), the processing when the transmission data selection device 816 is in the relay transmission state is terminated.

In step S70, when the value of the relay failure remaining size counter 809 is not 0, the transmission data selection device 816 confirms the output of the relay interrupt availability determination device 815 (step S80).

In step S80, when the output of the relay interrupt availability determination device 815 is invalid, the transmission data selection device 816 performs the processing from step S71.

In step S80, when the output of the relay interrupt availability determination device 815 is valid, the transmission data selection device 816 outputs the delimiter 3030 from the delimiter output device 823 to the transmission port 824, and transits to the relay relay interrupt state (step S81). ), The processing when the transmission data selection device 816 is in the relay transmission state is terminated.

Next, processing when the transmission data selection device 816 is in the relay relay state (in the drawing, expressed as “processing in the relay relay state”) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the relay failure remaining size counter 809 is 0 or more (step S83).

In step S83, when the value of the relay failure remaining size counter 809 is 0 or more, the transmission data selection device 816 outputs one word from the relay failure buffer 812 to the transmission port 824, requests the transmission counter 825 to increment, The relay failure remaining size counter 809 is requested to decrement (step S84), and the process when the transmission data selection device 816 is in the relay relay state is terminated.

In step S83, when the value of the remaining relay failure size counter 809 is 0, the transmission data selection device 816 transits to the relay transmission state (step S85), and processing when the transmission data selection device 816 is in the relay relay state. Exit.

Next, processing when the transmission data selection device 816 is in the relay own device state (in the drawing, expressed as “processing in the relay own device state”) will be described with reference to FIG.

First, the transmission data selection device 816 confirms whether the value of its own device failure remaining size counter 821 is 0 or more (step S87).

In step S87, when the value of the own device failure remaining size counter 821 is 0 or more, the transmission data selection device 816 outputs one word from the own device failure buffer 822 to the transmission port 824, and requests the transmission counter 825 to increment. Then, the own device failure remaining transmission counter 825 is requested to decrement (step S88), and the processing when the transmission data selection device 816 is in the relay own device state is terminated.

In step S87, when the value of the own device failure remaining size counter 821 is 0, the transmission data selection device 816 transits to the relay transmission state (step S88), and the transmission data selection device 816 is in the relay own device state. The process ends.

Next, processing when the transmission data selection device 816 is in the relay division state (denoted as “processing in the relay division state” in the drawing) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the transmission counter 825 is smaller than the size of the frame header 1010 (step S90).

In step S90, when the value of the transmission counter 825 is smaller than the size of the frame header 1010, the transmission data selection device 816 outputs one word from the relay division header generation device 814 to the transmission port 824 and requests the transmission counter 825 to increment. (Step S91), and the process when the transmission data selection device 816 is in the relay division state is terminated.

In step S90, when the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010, the transmission data selection device 816 checks whether the value of the relay remaining size counter 806 is larger than 0 (step S92).

In step S92, when the value of the relay remaining size counter 806 is greater than 0, the transmission data selection device 816 outputs one word from the relay data buffer 811 to the transmission port 824, requests the relay remaining size counter 806 to decrement, The transmission counter 825 is requested to increment (step S93), and the processing when the transmission data selection device 816 is in the relay division state is terminated.

In step S92, when the value of the relay remaining size counter 806 is 0, the transmission data selection device 816 requests the transmission counter 825 to clear, transitions to a transmission standby state (step S94), and the transmission data selection device 816 relays. The process in the split state is terminated.

Next, processing when the transmission data selection device 816 is in a relay failure state (in the drawing, expressed as “processing in a relay failure state”) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the transmission counter 825 is smaller than the size of the frame header 1010 (step S96).

In step S96, when the value of the transmission counter 825 is smaller than the size of the frame header 1010, the transmission data selection device 816 outputs one word from the relay failure header buffer 808 to the transmission port 824, and requests the transmission counter 825 to decrement. (Step S97), the processing when the transmission data selection device 816 is in the relay failure state is terminated.

In step S96, when the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010, the transmission data selection device 816 checks whether the value of the relay remaining size counter 806 is larger than 0 (step S98).

In step S98, when the value of the relay failure remaining size counter 809 is larger than 0, the transmission data selection device 816 outputs one word from the relay failure buffer 812 to the transmission port 824, and requests the relay failure remaining size counter 809 to decrement. Then, the transmission counter 825 is requested to increment (step S99), and the processing when the transmission data selection device 816 is in the relay failure state is terminated.

In step S98, when the value of the relay failure remaining transmission counter 825 is 0, the transmission data selection device 816 requests the transmission counter 825 to clear, transits to the transmission standby state (step S100), and the transmission data selection device 816 Terminates the processing when the relay failure state occurs.

Next, processing when the transmission data selection device 816 is in its own device harmful state (in the drawing, expressed as “processing in the own device failure state”) will be described with reference to FIG.

First, the transmission data selection device 816 checks whether the value of the transmission counter 825 is smaller than the size of the frame header 1010 (step S101).

In step S96, when the value of the transmission counter 825 is smaller than the size of the frame header 1010, the transmission data selection device 816 outputs one word from the own device failure header buffer 820 to the transmission port 824, and requests the transmission counter 825 to decrement. (Step S102), the processing when the transmission data selection device 816 is in its own device failure state is terminated.

In step S101, when the value of the transmission counter 825 is equal to or larger than the size of the frame header 1010, the transmission data selection device 816 checks whether the value of the own device failure remaining size counter 821 is larger than 0 (step S103).

In step S103, when the value of the own device failure remaining size counter 821 is larger than 0, the transmission data selection device 816 outputs one word from the own device failure buffer 822 to the transmission port 824, and sends it to the own device failure remaining size counter 821. The decrement is requested, the increment is requested to the transmission counter 825 (step S104), and the process when the transmission data selection device 816 is in its own device failure state is terminated.

In step S105, when the value of the own device failure remaining size counter 821 is 0, the transmission data selection device 816 requests the transmission counter 825 to clear, and the transmission data selection device 816 transitions to the transmission standby state (step S105). The processing when the transmission data selection device 816 is in its own device failure state is terminated.

When the processing in step S30, step S39, step S54, step S58, step S61, step S95, step S67, step S82, step S86, step S89, or step S101 is completed, the external input / output device 813 performs output processing. To implement.
This process will be described with reference to FIG.

First, the external input / output device 813 confirms whether itself (the external input / output device 813) outputs the fault data and the fault frame header 6010 (step S107).

In step S107, when the external input / output device 813 outputs the failure data and the failure frame header 6010, the external input / output device 813 writes the failure frame header 6010 in the own device failure header buffer 820 and stores the failure data in the own device. Writing to the failure buffer 822 (step S108), it is confirmed whether itself (external input / output device 813) outputs the control data 2020 and the control frame header 2010 (step S109).

In step S107, when the external input / output device 813 does not output the failure data and the failure frame header 6010, the processing of step S109 is performed.

In step S109, when the external input / output device 813 is outputting the control data 2020 and the control frame header 2010, the external input / output device 813 writes the control frame header 2010 in its own device header buffer 817, and the control data 2020 is stored in itself. Writing to the device data buffer 819 (step S110), the output processing of the external input / output device 813 is terminated.

In step S109, when the external input / output device 813 does not output the control data 2020 and the control frame header 2010, the output processing of the external input / output device 813 is terminated.

Next, processing when the transmission data selection device 816 is in the reception standby state (denoted as “processing in the reception standby state” in the drawing) will be described with reference to FIG.

First, the reception data distribution device 801 checks whether one word has been received from the reception port 800 (step S112).

In step S112, when receiving one word from the reception port 800, the reception data distribution device 801 transitions to the header reception state (S113).

In step S112, when one word is not received from the reception port 800, the reception data distribution device 801 ends the processing when the reception data distribution device 801 is in the reception standby state.

As described above, also according to the present embodiment, when the communication apparatus 200 performs a failure notification, the communication apparatus 100 interrupts the failure notification in the control frame so that the period of the control communication remains short. Can be shortened.

As described above, in the present embodiment,
Connected with other devices in a daisy chain,
Receive a frame consisting of frame header and frame data from other devices,
Relay frames received from other devices,
Send frames input from the external input / output device to other devices,
A communication device that repeats transmission and reception with another device at a predetermined time interval has been described.

And the communication apparatus which concerns on this Embodiment is
It has a reception port that receives frames from other devices and outputs them to the reception frame distribution device,
About received frames (hereinafter referred to as relay frames)
A relay header buffer for storing received frame headers;
A relay data buffer for storing received frame data;
About the frame to notify the received failure (hereinafter referred to as failure frame)
A relay failure header buffer for storing the received failure frame header;
A relay failure buffer for storing received failure frame data;
The received relay frame header is sorted and stored in the relay header buffer, the received relay frame data is sorted and stored in the relay data buffer, the received fault frame header is sorted in the relay fault header buffer, and the received fault frame data is sorted in the relay fault buffer. It has been described that a receiving frame sorting device for storing is provided.

In addition, the communication device according to the present embodiment is
About the frame input from the external input / output device (hereinafter referred to as its own device frame)
A self-device header buffer for storing a header of the self-device frame;
Own device data buffer for storing own device frame data;
About failure frames input from external I / O devices (hereinafter referred to as own device failure frames)
Own device failure header buffer for storing the own device failure frame header;
Own device failure buffer for storing own device failure frame data,
Select the data to be transmitted from the relay header buffer, relay data buffer, relay failure header buffer, relay failure buffer, local device header buffer, local device data buffer, local device failure header buffer, or local device failure buffer for each word, and transmit It has a transmission data selection device that transmits from the port to other devices,
The communication device according to the present embodiment is
It has been described that the failure data is transmitted from the transmission data selection device by interrupting the frame being transmitted.

In addition, the communication device according to the present embodiment is
It has been described that a transmission data selection device is provided that reads a delimiter indicating the head of failure data interrupting a frame being transmitted from a delimiter output device and transmits the delimiter.

In addition, the communication device according to the present embodiment is
The value of the reception counter that counts the number of received words,
An interrupt counter value that counts the number of words of fault data in the received frame,
Output of the header buffer that stores the received header,
The value of the interrupt counter that counts the number of words of fault data received;
It has been described that the reception frame distribution device has a reception frame distribution device that switches the storage destination of the received word based on the delimiter detection function of the reception frame distribution device itself.

In addition, the communication device according to the present embodiment is
The size of the own device frame being transmitted by the transmission data selection device itself,
Transmission data that controls the position at which fault data is interrupted in the local frame being transmitted, based on the value of the transmission counter that counts the number of transmitted words and the output of the local apparatus interrupt enable / disable determination device that outputs whether the fault data can be transmitted Having described a selection device.

In addition, the communication device according to the present embodiment is
Based on the size of the relay frame being transmitted by the transmission data selection device itself, the value of the transmission counter, and the output of the relay interrupt availability determination device that outputs whether the failure data can be transmitted, the position where the failure data is interrupted in the frame being transmitted is determined. It has been described that a transmission data selection device to be controlled is included.

In addition, the communication device according to the present embodiment is
Based on the value of the transmission counter and the self-device remaining size counter that counts the number of words in the frame data of the transmitted self-device frame, it is added to the frame data pushed out by interrupting the failure data into the self-device frame being transmitted. It has been described that the apparatus has a self-partition header generation apparatus that outputs a frame header (hereinafter referred to as a self-partition header).

In addition, the communication device according to the present embodiment is
A frame header that is added to the frame data that is pushed out by interrupting failure data in the relay frame that is being transmitted, based on the value of the transmission counter and the remaining relay size counter that counts the number of words in the frame data of the transmitted relay frame It has been described that a relay split header generation device that outputs (hereinafter referred to as a relay split header) is provided.

In addition, the communication device according to the present embodiment is
It has been described that the apparatus has a transmission data selection device that transmits the frame data pushed out by interrupting fault data into the own device frame being transmitted from the own device data buffer following the own device division header.

In addition, the communication device according to the present embodiment is
It has been described that a transmission data selection device that transmits frame data pushed out by interrupting failure data into a relay frame being transmitted from the relay data buffer is transmitted following the relay division header.

In addition, the communication device according to the present embodiment is
A reconstruction buffer for storing the split data;
It has a reconstruction counter that counts the number of received divided data,
It has been described that there is a function of reconfiguring the divided data and outputting the data before the failure data is interrupted to the external device in accordance with the reading of the external device.

In the above description, the communication apparatus that performs communication using the FA network has been described as an example. However, the methods described so far can be applied to communication apparatuses that perform communication using other types of networks.
In other words, the use of the method described so far is not limited to a communication device that performs communication on the FA network.

Finally, a hardware configuration example of the

communication apparatuses

100, 200, and 300 shown in the first and second embodiments will be described.
FIG. 42 is a diagram illustrating an example of hardware resources of the

communication devices

100, 200, and 300 described in the first and second embodiments.
42 is merely an example of the hardware configuration of the

communication devices

100, 200, and 300, and the hardware configuration of the

communication devices

100, 200, and 300 is not limited to the configuration illustrated in FIG. Other configurations may be used.

42, the

communication devices

100, 200, and 300 include a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a processor) that executes a program.
The CPU 911 is connected to, for example, a ROM (Read Only Memory) 913, a RAM (Random Access Memory) 914, a communication board 915, a display device 901, a keyboard 902, a mouse 903, and a magnetic disk device 920 via a bus 912. Control hardware devices.
Further, the CPU 911 may be connected to an FDD 904 (Flexible Disk Drive), a compact disk device 905 (CDD), a printer device 906, and a scanner device 907.
Further, instead of the magnetic disk device 920, a storage device such as an SSD (Solid State Drive), an optical disk device, or a memory card (registered trademark) read / write device may be used.
The RAM 914 is an example of a volatile memory.
The storage media of the ROM 913, the FDD 904, the CDD 905, and the magnetic disk device 920 are an example of a nonvolatile memory.
These are examples of the storage device.
The “˜buffer” and “˜buffer unit” described in the first and second embodiments are realized by the RAM 914 or the like, for example.
A communication board 915, a keyboard 902, a mouse 903, a scanner device 907, and the like are examples of input devices.
The communication board 915, the display device 901, the printer device 906, and the like are examples of output devices.
The communication board 915 is connected to the communication path.

The magnetic disk device 920 stores an operating system 921 (OS), a window system 922, a program group 923, and a file group 924.
The programs in the program group 923 are executed by the CPU 911 using the operating system 921 and the window system 922.

The RAM 914 temporarily stores at least part of the operating system 921 program and application programs to be executed by the CPU 911.
The RAM 914 stores various data necessary for processing by the CPU 911.

The ROM 913 stores a BIOS (Basic Input Output System) program, and the magnetic disk device 920 stores a boot program.
When the

communication devices

100, 200, and 300 are activated, the BIOS program in the ROM 913 and the boot program in the magnetic disk device 920 are executed, and the operating system 921 is activated by the BIOS program and the boot program.

The program group 923 stores programs that execute the functions described as “˜unit” and “˜device” in the description of the first and second embodiments. The program is read and executed by the CPU 911.

In the file group 924, in the description of the first and second embodiments, “determination of”, “setting of”, “comparison of”, “analysis of”, “control of”, “set of” ”,“ Registration of ”,“ selection of ”,“ input of ”,“ output of ”, and the like, information, data, signal values, and variable values indicating the results of the processing are stored in the main memory 303. Is stored as a file.
Further, the encryption key / decryption key, random number value, and parameter may be stored in the main storage device 303 as a file.
The “˜file” and “˜database” are stored in a storage medium such as a disk or memory.
Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit.
The read information, data, signal value, variable value, and parameter are used for CPU operations such as extraction, search, reference, comparison, calculation, calculation, processing, editing, output, printing, and display.
Information, data, signal values, variable values, and parameters are stored in the main memory, registers, cache memory, and buffers during the CPU operations of extraction, search, reference, comparison, calculation, processing, editing, output, printing, and display. It is temporarily stored in a memory or the like.
In addition, the arrows in the flowcharts described in the first and second embodiments mainly indicate input / output of data and signals.
Data and signal values are recorded in a storage medium such as a memory of the RAM 914, a flexible disk of the FDD 904, a compact disk of the CDD 905, a magnetic disk of the magnetic disk device 920, other optical disks, mini disks, and DVDs.
Data and signals are transmitted online via a bus 912, signal lines, cables, or other transmission media.

In the description of the first and second embodiments, what is described as “to part” and “to device” may be “to circuit” and “to device”, and “to step” It may be “˜procedure” or “˜processing”.
That is, the “communication method” according to the present invention can be realized by the steps, procedures, and processes shown in the flowcharts described in the first and second embodiments.
Further, what is described as “˜unit” and “˜device” may be realized by firmware stored in the ROM 913.
Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware.
Firmware and software are stored as programs in a storage medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD.
The program is read by the CPU 911 and executed by the CPU 911.
That is, the program causes the computer to function as “˜unit” and “˜device” in the first and second embodiments. Alternatively, the procedures and methods of “˜unit” and “˜apparatus” of the first and second embodiments are executed by a computer.

As described above, the

communication devices

100, 200, and 300 shown in the first and second embodiments have a display as an output device such as a CPU as a processing device, a memory as a storage device, a magnetic disk, a keyboard as an input device, a mouse, a communication board, and the like. A computer including a device, a communication board, and the like.
As described above, the functions indicated as “˜unit” and “˜device” are realized by using these processing devices, storage devices, input devices, and output devices.

100 communication device, 101 control unit, 102 frame reception unit, 103 received data distribution unit, 104 received data reconstruction unit, 105 data generation unit, 106 transmission frame generation unit, 107 frame transmission unit, 110 transmission buffer unit, 111 failure Frame buffer unit, 112 Control frame buffer unit, 120 Frame generation management unit, 121 Transmission determination unit, 122 Sequence control unit, 123 Remaining data size count unit, 130 Reconfiguration buffer unit, 131 Fault frame buffer unit, 132 Control frame buffer Unit, 140 reconfiguration management unit, 141 data extraction unit, 142 data size count unit, 143 data restoration unit, 144 control data stack, 145 fault data stack, 200 communication device, 300 communication device 800 reception port, 801 reception data distribution device, 802 reception counter, 803 header buffer, 804 relay header buffer, 805 reconfiguration buffer, 806 relay remaining size counter, 807 reconfiguration counter, 808 relay failure header buffer, 809 relay failure remaining size Counter, 810 interrupt counter, 811 relay data buffer, 812 relay failure buffer, 813 external input / output device, 814 relay split header generation device, 815 relay interrupt enable / disable determination device, 816 transmission data selection device, 817 own device header buffer, 818 own Device remaining size counter, 819 own device data buffer, 820 own device failure header buffer, 821 own device failure remaining size counter, 822 own device failure buffer, 8 3 delimiter output device, 824 send port 825 sends the counter, 826 own device interrupt determination device, 827 own device fragment header generator.

Claims

A data transmission unit that sequentially transmits data to be transmitted in one communication frame from the top;
When specific data is newly generated before the data transmission unit completes data transmission, the data type of untransmitted untransmitted data is analyzed at the time of generation of the specific data, and the specific data is A transmission determining unit for determining whether to transmit before the untransmitted data;
When the transmission determining unit determines to transmit the specific data before the untransmitted data, the specific data is transmitted before the untransmitted data, and the transmission of the specific data is completed An order control unit that controls the transmission order of the specific data and the non-transmitted data so that transmission of the non-transmitted data is started,
The data transmitter is
When the transmission determining unit determines to transmit the specific data before the untransmitted data, the specific data is transmitted before the untransmitted data based on the transmission order control by the sequence control unit. And the transmission after the transmission of the specific data is started from the untransmitted data.
The sequence control unit includes:
As a result of the specific data being transmitted before the untransmitted data, at least a part of the untransmitted data that cannot be transmitted in the communication frame is controlled to be transmitted in a communication frame subsequent to the communication frame;
The data transmitter is
The communication apparatus according to claim 1, wherein at least a part of the untransmitted data that cannot be transmitted in the communication frame is transmitted in a communication frame subsequent to the communication frame.
The transmission determining unit
Analyzing whether the data type of the head untransmitted data located at the head in the untransmitted data is a priority type to which data should be transmitted with priority,
The communication apparatus according to claim 1, wherein when the data type of the first untransmitted data is not a priority type, the specific data is determined to be transmitted before the untransmitted data.
The transmission determining unit
When the data type of the head untransmitted data is a priority type, it is determined to transmit the specific data after the data portion of the priority type after the head untransmitted data is transmitted,
The sequence control unit includes:
The specific data is transmitted after the data portion of the priority type after the head untransmitted data is transmitted, and the transmission after the completion of the transmission of the specific data is the non-priority data portion in the untransmitted data. Control the transmission order of the specific data and the untransmitted data so as to start from the beginning,
The data transmitter is
Based on the transmission order control by the sequence control unit, the data portion of the priority type after the first untransmitted data is transmitted, the specific data is transmitted, and the transmission after the transmission of the specific data is completed 4. The communication apparatus according to claim 3, wherein the communication apparatus starts from the beginning of a data portion that is not a priority type in untransmitted data.
The communication device further includes:
A remaining data size counting unit that counts the remaining data size that can be transmitted in the current communication frame as a transmittable remaining data size;
The transmission determining unit
When the data type of the first untransmitted data located at the head in the untransmitted data is not a priority type, the remaining transmittable data size at the time of occurrence of the specific data is the data size of the specific data Deciding to transmit the specific data before the untransmitted data in a current communication frame when the sum is greater than or equal to the data size of the delimiter transmitted before the specific data;
When the remaining transmittable data size at the time of occurrence of the specific data is less than the sum of the data size of the specific data and the data size of the delimiter, the specific data is transferred in a subsequent communication frame. The communication apparatus according to claim 3, wherein the communication apparatus determines to transmit.
The data transmitter is
The untransmitted data corresponding to the transmittable remaining data size after the delimiter and the specific data are transmitted is transmitted in the current communication frame, and the untransmitted data not transmitted in the current communication frame is transmitted in the subsequent communication frame. The communication apparatus according to claim 5, wherein the communication apparatus transmits the data.
The data transmitter is
When the transmission determining unit determines to transmit the specific data in the current communication frame before the untransmitted data, the specific data is transmitted following the delimiter in the current communication frame. The communication device according to claim 5.
The communication device further includes:
A data receiving unit for receiving data transmitted from an external device;
The transmission determining unit
When the data receiving unit receives the specific data from the external device before the data transmitting unit completes the data transmission, the data receiving unit receives the specific data received from the external device as the unread data. The communication apparatus according to claim 1, wherein it is determined whether or not to transmit before transmission data.
The communication device further includes:
A data generation unit that generates data to be transmitted from the data transmission unit;
The transmission determining unit
Whether the specific data generated by the data generation unit is transmitted before the unsent data when the data generation unit generates the specific data before the data transmission unit completes data transmission The communication apparatus according to claim 1, wherein it is determined whether or not.
The data transmitter is
Data received from an external device and transmitted in one communication frame in order from the beginning,
The transmission determining unit
The data transmission unit determines whether to transmit the specific data before the untransmitted data when the specific data occurs before completing the transmission of the data received from the external device The communication apparatus according to claim 1, wherein:
The data transmitter is
The data generated in the communication device, the data to be transmitted in one communication frame, sequentially transmitted from the beginning,
The transmission determining unit
Whether or not to transmit the specific data before the untransmitted data when the specific data occurs before the data transmission unit completes transmission of the data generated in the communication device The communication device according to claim 1, wherein the communication device is determined.
The communication device further includes:
A data receiving unit that receives a plurality of divided data divided from predetermined pre-division data in two or more communication frames;
A data extraction unit that extracts divided data of the pre-division data from the data received by the data receiving unit for each communication frame;
A divided data storage unit that stores the divided data extracted by the data extraction unit;
A data size counting unit that counts a cumulative value of the data size of the divided data stored in the divided data storage unit;
The total data size of the pre-division data is derived, and when the cumulative value of the data size counted by the data size count unit reaches the derived total data size of the pre-division data, the division data storage unit The communication apparatus according to claim 1, further comprising: a data restoring unit that restores the pre-division data using the stored divided data.
The transmission determining unit
As the specific data, failure data notifying that a failure has been detected in at least one of the communication device and a network to which the communication device belongs is generated before the data transmission unit completes data transmission. 2. The communication apparatus according to claim 1, wherein, in the case where the failure data is transmitted, the communication apparatus determines whether to transmit the failure data before the untransmitted data.
Computer
Send data to be transmitted in one communication frame in order from the beginning,
When specific data is newly generated before data transmission is completed, the data type of untransmitted untransmitted data is analyzed at the time of occurrence of the specific data, and the specific data is converted to the untransmitted data. Decide whether to send before,
When it is decided to transmit the specific data before the untransmitted data, the specific data is transmitted before the untransmitted data, and transmission after the transmission of the specific data is completed is not transmitted. Control the transmission order of the specific data and the untransmitted data so as to start from the transmission data,
When it is determined to transmit the specific data before the untransmitted data, based on the control of the transmission order, the specific data is transmitted before the untransmitted data, and the specific data is transmitted. A communication method characterized by starting transmission after completion from the untransmitted data.
A data transmission process for transmitting data to be transmitted in one communication frame in order from the top;
When specific data is newly generated before the data transmission process completes data transmission, the data type of untransmitted untransmitted data is analyzed at the time of generation of the specific data, and the specific data is A transmission determination process for determining whether to transmit before the untransmitted data;
When the transmission determination process determines to transmit the specific data before the untransmitted data, after the specific data is transmitted before the untransmitted data and the transmission of the specific data is completed So that the specific data and the transmission control order of the untransmitted data are controlled by a computer so that the transmission of the untransmitted data is started,
When the transmission determination process determines to transmit the specific data before the untransmitted data, based on the transmission order control by the order control process, in the data transmission process, the specific data is sent to the computer. A program that transmits data before the untransmitted data and starts transmission after the transmission of the specific data is started from the untransmitted data.