JP3362349B2 - Emulation method and emulator device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulation method and an emulator device for simulating a communication timing delay of an FA system having a plurality of communication devices.

[0002]

2. Description of the Related Art In recent years, the overall configuration of FA (Factory Automation) systems has become increasingly complex. To control such a complicated FA system, for example, FIG.
As shown in FIG. 1, a configuration in which a plurality of programmable controllers (hereinafter referred to as PLC) 70 are connected to the line 60 is used.

In addition, such an FA system is used for each P
Under the limitation of the cycle time that the LC 70 can take in one scan, the switches, sensors (not shown), and the like to be controlled are controlled in cooperation with each other although they are asynchronous.

[0004]

As described above, in an FA system in which a plurality of PLCs 70 are connected to the line 60, each PLC 70 cooperates with each other under the limitation of the cycle time that each PLC 70 can take in one scan. Since it is designed to control the switches, sensors, etc. to be controlled, it is necessary to consider the communication timing that connects each PLC 70 when performing a debug test at the time of system startup or system modification. There was a problem that the debug test work was very inefficient because the actual machine had to be used on site.

In view of the above problems, the present invention provides an emulation method and an emulator device for efficiently executing a debug test of a processing program executed by each PLC without using an actual machine on site. With the goal.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 is an emulation method for virtualizing an FA system having a plurality of communication devices and reproducing communication timing delay in a pseudo manner. Then, the duplication registration of the network address to be registered corresponding to the node of the communication device which constitutes the FA system is checked, and the first virtualization communication means executes the debug test target program execution.
After line, when the transmission data in the shared memory for the event communication is stored, the transmission data for the event communication,
Also, the transmission data is stored in the shared memory for cyclic communication.
If it is, the transmission data for the cyclic communication is sent.
The data, transmitted to the transmission path respectively emulator unit, the transmission channel emulator means, the transmission data transmitted, after a predetermined delay time, and transmitted to the second virtualization communication means, receiving said transmission In the second virtualization communication means,
Based on the network address of the received transmission data
If it is determined that it is the transmission data for event communication addressed to the local node, the transmission data is shared with the event communication shared memo.
Write to Li, a process is executed to write the transmit data cyclically shared memory communication If the transmission data for the cyclic communication.

According to a second aspect of the present invention, there is provided an emulation device for simulating an FA system having a plurality of communication devices, the network of the communication device corresponding to a node of the communication device constituting the FA system. Network address registration means for registering an address, duplication check means for checking the duplication of the registered network address by referring to the network address registration means when registering the network address, and transmission data for event communication are stored. Shared memo for event communication
And Li, and the shared memory for the cyclic communication that stores transmit data for cyclic communication, debug, test-flops
After program execution, when the <br/> transmitting data to said shared memory for event communication is stored, the transmission data for the event communication, also shared main for the cyclic communication
When the transmission data is stored in the memory , the transmission data for the cyclic communication is transferred to the transmission line
When receiving the first virtual communication means for transmitting to the emulator means and the transmission data from the first virtualization communication means , after delaying the received transmission data for a predetermined time,
Said transmission line emulator means for transmitting to the second virtualization communication means, receiving said transmission data which the transmission channel emulator means has transmitted the transmission data thereof received is, a transmission data for event communication, And the transmission data
If on the basis of the network address of the over data is directed to its own node, shared memory for the event communication the transmission data
Stored in the reception queue of the network , and if it is the transmission data for cyclic communication, the transmission data is assigned to the node assignment table.
Referring to Le, having a second virtualization communication means to be stored in the cyclic shared memory for communication.

The invention according to claim 3 is the invention according to claim 2 , which is registered by the duplication check means.
Checked for duplicate network addresses
In this case, the display screen displays the node and the network
A display means for displaying the network address is provided.

[0009]

[0010]

[0011]

[0012]

According to the present invention, when transmission data is received from one virtualized communication device, the virtualized transmission path emulator means delays the received transmission data by a predetermined time, and then transmits it to another virtualized communication device. Since it is transmitted, the communication timing delay can be simulated.

Further, since the duplication of the registered network addresses is checked at the time of registering the network address of the communication device constituting the communication system, it is possible to prevent an erroneous network address registration error.

Particularly, when the registered network addresses are duplicated, the node and the network address of the node are displayed on the display screen.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an emulation method and an emulator device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an FA system emulated by the emulator device of this embodiment, FIG. 2 is a block diagram showing a module configuration of the FA system, and FIG. 3 is an example of the emulator device according to the present invention. It is a block diagram which shows the structure of embodiment.

The emulator device of this embodiment is shown in FIG.
PLC using a personal computer connected to the first transmission line 52 and the second transmission line 53 as shown in FIG.
(Hereinafter referred to as personal computer PLC) 50 and the first transmission line 5
A plurality of (# 1 to #i) PLCs 51 connected to No. 2 and a plurality (#j to #n) of PLCs connected to the second transmission path 53
This is an emulator device that emulates the following items in event communication and cyclic communication in the FA system configured by 51 and 51.

Network address registration and duplication check Communication delay

Event communication refers to a communication mode in which data is exchanged each time a request from an application program occurs. Cyclic communication is a form of communication in which a communication unit periodically exchanges data at predetermined time intervals.

Here, the above-mentioned FA system implemented by the emulator device of this embodiment will be described in more detail. It can be represented by a component portion composed of modules as shown in FIG.

That is, the personal computer PLC 50 is
Software PLC unit 501 having the function of # 1, and the # 1 first communication unit 502 connected to the first transmission path 52
And the second communication unit 502 of # 2 connected to the second transmission path 53 can be modularized.

The PLC 51 of # 1 to #i is a PLC
It can be modularized so as to be composed of a PLC unit 511 forming a main body and a communication unit 512 connected to the first transmission path 52. Similarly, the PLC main body of the PLC 51 of #j to #n can also be formed. The PLC unit 511 and the communication unit 512 connected to the second transmission path 53 can be modularized.

The emulator device of this embodiment emulates and in the FA system described above, and includes a virtual PLC unit 11 and
Virtual PLC units 12 of # 1 to #n, a first transmission path emulator means 13, a second transmission path emulator means 14,
Event communication shared memory 15, cyclic communication shared memory 16, node allocation table 17, BU
It is composed of a SY flag storage memory 18 and an emulation program storage memory 19.

The virtual PLC unit 11 is a PLC 51 (personal computer PL) on the side of transmitting data in the FA system described above.
(Including C50) is virtualized, and has a virtual communication unit means 111 that performs processing as described in detail later.

The virtual PLC units 12 of # 1 to #n are virtualized PLCs 51 on the side of receiving data in the FA system, and include virtual communication unit means 121 for performing the processing described in detail later. Have

The first transmission path emulator means 13 is used for event communication, and the virtual PLC unit 1
Data is virtually transmitted and controlled (emulated) between 1 and any one of the virtual PLC units 12 of # 1 to #n.

More specifically, the first transmission line emulator means 13 is a virtual PLC unit 1 for transmitting data.
When the transmission data is received from 1, the received transmission data is delayed for a predetermined time, and then the reception side virtual PLC unit 12
It is designed to be transmitted to. The predetermined delay time, that is, the delay time can be changed to a desired value by a program or an input means such as a keyboard.

The first transmission line emulator means 13
As will be described later in detail, when registering the network address of the communication device that constitutes the communication system, the duplication of the registered network address is checked.

Then, the first transmission line emulator means 13
When the registered network addresses are duplicated, the node and the network address of the node are displayed on the display screen.

The second transmission path emulator means 14 is used for cyclic communication, and virtually transmits data between the virtual PLC unit 11 and any one of the virtual PLC units 12 of # 1 to #n. It is designed to control (emulate) transmission.

The specific content is the same as that of the first transmission path emulation means 14, so its explanation is omitted. However, since the processing operation is described in detail later, its content will be referred to.

The event communication shared memory 15 stores transmission data and received data in event communication, and the cyclic communication shared memory 16 stores transmission data and received data in cyclic communication.

[0034] node allocation table 17, # 1~ # n
It has a node number area 171 for storing the node number (number) of the virtual PLC section of No. 1 and a network address area 172 for storing the network address.

The BUSY flag storage memory 18 stores a flag indicating whether or not the transmission path is BUSY.

The program storage memory 19 is used for debugging,
It stores the program to be tested.

Next, the network address registration, duplicate registration check processing, and emulation processing of the communication unit of the emulation device of this embodiment will be described separately for event communication and cyclic communication.

(1) In case of event communication Regarding network address registration and duplicate registration check processing of the communication unit The following is a description of this network address registration processing shown in FIG.
This will be described with reference to the flowchart in FIG.

Here, in explaining the network address registration processing of the communication unit, the virtual PLC section 11 constituting the emulator device corresponds to the personal computer PLC 50 of the actual system, and the virtual PLCs of # 1 to #n.
Reference numeral 12 corresponds to each PLC 51 of the actual system.

When the virtual communication unit means 111 of the virtual PLC section 11 requests the first transmission path emulator means 13 to register a predetermined network address of the virtual PLC section 12 (step 110), the first transmission path The emulator means 13 is a corresponding predetermined virtual PLC unit 1
Node assignment table 17 with the network address of 2
(Step 120).

Subsequently, the first transmission line emulator means 13
Refers to the node allocation table 17 and determines whether or not the network address is duplicately registered (step 130).

When the first transmission path emulator means 13 determines that the network addresses are duplicately registered (step 130; Yes), the duplicated network addresses are detected (step 140), and the duplicated network addresses are detected. At the same time, the node number is displayed on the display screen (step 150), and the process proceeds to step 160. On the other hand, when it is determined that the duplicate registration is not performed (step 130; No), the process is directly performed in step 16
The processing shifts to 0.

In step 160, the virtual PLC unit 1
1 determines whether or not registration requests for all network addresses have been made to the first transmission path emulator means 13 (step 160), and as a result, it has been determined that registration requests for all network addresses have not been made. If (Step 160; No), Step 1
While returning the processing to 10 and continuing the processing similar to the above,
If it is determined that registration requests have been made for all network addresses (step 160; Yes),
The network address registration process of the communication unit ends.

[0044] Here, the communication timing delay process, on the occasion to explain the communication timing delay process,
The virtual PLC unit 11 that constitutes the emulator device is a personal computer PLC 50 that transmits data in the actual transmission system.
And the virtual PLC units 12 of # 1 to #n are
It corresponds to each PLC 51 on the side of receiving data in the actual machine system.

This emulation processing is a)
Virtual communication unit means 111 of the virtual PLC unit 11 on the data transmitting side, b) Virtual PLC on the data receiving side
The respective processes of the virtual communication unit means 121 in the section 12 and c) the first transmission path emulator means 13 will be described separately.

A) Virtual PLC unit 1 on the data transmitting side
Regarding the processing by the virtual communication unit means 111, the processing by the virtual communication unit means 111 will be
This will be described with reference to the flowchart in FIG.

The virtual communication unit means 111 determines whether or not the debug test target program stored in the program storage memory 19 is executed and the transmission data is stored in the event communication shared memory 15 (step). 210).

As a result of the judgment, the virtual communication unit means 111 judges that the transmission data is stored in the event communication shared memory 15 (step 210; Y).
es), while reading the data from the event communication shared memory 15 (step 220), when judging that the data is not stored (step 210; No), wait until the transmission data is stored in the event communication shared memory 15. To do.

The virtual communication unit means 111 judges that the transmission data is stored in the event communication shared memory 15 (step 210; Yes), and when the data is read from this memory 15, it is stored in the BUSY flag storage memory 18. By determining whether or not the BUSY flag is set, it is determined whether or not the transmission path is BUSY (step 230).

When the virtual communication unit means 111 determines that the transmission path is BUSY (step 230;
Yes), while waiting until the transmission line becomes empty (EMPTY), if the transmission line is not BUSY (step 230; No), the transmission data is transmitted to the first transmission line emulator means 13 and processed in step 210. Is returned and processing similar to the above is continued.

(B) Regarding the operation of the virtual communication unit means 121 in the virtual PLC unit 12 for receiving data The processing of the virtual PLC unit 12 for receiving data will be described below with reference to the flowchart of FIG.

Virtual communication unit means 12 of # 1 to #n
1 receives the transmission data transmitted on the transmission path (assuming that there is a transmission path) controlled by the first transmission path emulator means 13 and reads the destination address from the received data (step 310). , It is determined whether the received data is data addressed to the own node (step 32).
0).

When each virtual communication unit means 121 determines that the received data is not data addressed to its own node (step 320; No), it returns the process to step 310 and continues the same process as above. When it is determined that the received data is data addressed to the own node (step 320; Yes), the received data is received (step 330) and the event communication shared memory 15 is received.
It is determined whether there is a free space (step 340).

The virtual communication unit means 121, which has judged that the received data is addressed to its own node, waits until there is free space when it judges that there is no free space in the event communication shared memory 15 (step 340; No). On the other hand, if it is determined that the event communication shared memory 15 has a free space (step 340; Yes), the reception queue of the event communication shared memory 15 (note that the first stored data is the first The received data is stored in the storage area which is designed to be read (step 350), the process is returned to step 310, and the same process as described above is continued.

C) Operation of the first transmission path emulator means 13 Hereinafter, the processing of the first transmission path emulator means 13 will be described with reference to FIG.
This will be described with reference to the flowchart in FIG.

When the first transmission path emulator means 13 receives the transmission data from the virtual communication unit means 111 for transmitting the data (step 410), it keeps BUSY in the BUSY flag storage memory 18 so that other data does not enter the transmission path. A flag is set (step 420), and a transmission path is delayed by a predetermined time using a timer (not shown) (step 430).

After that, the first transmission line emulator means 13
Is a virtual P of # 1 to #n when the timer has passed a predetermined time.
The transmission data from the virtual communication unit means 111 is transmitted to the LC section 121 (step 440), and # 1 to #
It is determined whether or not one of the n virtual PLC units 12 receives the data (step 450).

The first transmission line emulator means 13 is # 1
If it is determined that the data is also In any one of the virtual communication unit means 121 of the virtual PLC 12 of the ~ # n is not received (step 450; No), whereas to wait to receive data, # 1 When it is determined that data has been received by any one of the virtual communication unit means 121 of the #n virtual PLC unit 12 (step 450; Yes).
s), reset by clearing the BUSY flag set in the BUSY flag storage memory 18 for transmitting the next data (step 460), return the processing to step 410, and continue the same processing as described above. .

(1) In the case of cyclic communication Regarding the network address registration and duplicate registration check processing of the communication unit The network address registration and duplicate registration check processing of the communication unit in the case of cyclic communication are the same as in event communication. Therefore, detailed description thereof will be omitted.

Communication Timing Delay Processing Here, in explaining the communication timing delay processing,
The virtual PLC unit 11 that constitutes the emulator device corresponds to the PLC 50 that transmits the transmission data in the actual system, and the virtual PLCs 12 of # 1 to #n are provided in each PLC 51 on the side that receives the data in the actual system. It corresponds.

Hereinafter, this emulation processing is a)
Virtual communication unit means 111 of the virtual PLC unit 11 on the data transmitting side and the virtual PLC on the data receiving side
Processing of the virtual communication unit means 121 in the section 12,
B) The respective processing operations of the second transmission path emulator means 14 will be described separately.

A) Virtual PLC unit 1 on the data transmitting side
Regarding the processing of the virtual communication unit means 111 of No. 1 and the virtual communication unit means 121 in the virtual PLC unit 12 on the data receiving side, the processing operation will be described below with reference to the flowchart of FIG.

Each of the virtual PLC units 12 of # 1 to #n receives the token circulating in the node order (step 5).
10) After that, since it is the side that transmits data, it behaves as the virtual PLC 11 in FIG. Therefore, in the following description of this cyclic communication process, the virtual PLC unit 12 that has received the token will be referred to as the virtual PLC unit 11.

Upon receipt of the token, the virtual communication unit means 111 of the virtual PLC unit 11 activates the timer (step 515) and refers to the node allocation table 17 to refer to the transmission data of its own node for the cyclic communication shared memory. 16 read (step 520), BU
By determining whether or not the BUSY flag is set in the SY flag storage memory 18, it is determined whether or not the transmission path (virtual transmission path) is BUSY.

When the virtual communication unit means 111 of the virtual PLC unit 11 determines that the transmission path is BUSY (step 530; Yes), it refrains from transmitting data until it is not BUSY, but the transmission path is not BUSY. If it is determined (step 530; No), the transmission data read from the shared memory 16 for cyclic communication is transmitted via the second transmission line emulator means # 1 to # 1.
broadcast to the n virtual PLC units 12 (step 54).
0).

Subsequently, the first virtual communication unit means 111 of the virtual PLC unit 11 judges whether or not the simultaneous broadcast to all the nodes is completed (step 550), and the simultaneous broadcast to all the nodes is carried out. If it is determined that the broadcast has not been completed (step 550; No), while waiting until the broadcast is completed, if it is determined that the broadcast has been completed to all nodes (step 550; Yes), virtual PL
The process of the C section 11 is ended.

Each of the virtual PLC units 12 # 1 to #n receives data from the virtual PLC unit 11 (step 56).
0), the virtual communication unit means 121 refers to the received data in the node allocation table 17 (step 5
70) and write the data in the shared memory 16 for cyclic communication (step 580).

After that, the virtual communication unit means 121, which has written the received data into the shared memory 16 for cyclic communication, passes the token to the next virtual PLC unit 12 (step 585), stops the activation of the timer, and measures the time. The time is stored in memory (not shown) (step 590).

Then, the virtual communication unit means 121
If it is determined that the token has made one cycle (cycle) (step 595), and if it has been determined that the token has not made one cycle (step 595; No), the process returns to step 510 and the same processing as described above is continued. If it is determined that the token has gone round (step 595; Yes), the process of measuring the time for which one cycle process is performed when the debug test target program is operated is terminated.

B) Regarding the processing operation of the second transmission path emulator means 14, the processing operation of the second transmission path emulator means 14 will be described below.
This will be described with reference to the flowchart of FIG.

When the second transmission path emulator means 14 receives the transmission data from the virtual communication unit means 111 for transmitting the transmission data by broadcast (step 610), the BUSY flag is set so that other data does not enter the transmission path. The BUSY flag is set in the storage memory 18 (step 620) and the transmission path is delayed by a predetermined time using a timer (not shown) (step 630).

After that, the second transmission line emulator means 14
Is a virtual P of # 1 to #n when the timer has passed a predetermined time.
The transmission data from the virtual communication unit means 111 is broadcast to the LC unit 121 (step 640), and it is determined whether the broadcast to all nodes is completed (step 650).

When the second transmission path emulator means 14 determines that the broadcast to all nodes is not completed (step 650; No), it waits until data is received, while When it is determined that the simultaneous broadcast to the nodes is completed (step 650; Yes), the BUSY flag storage memory 18 for transmitting the next data is transmitted.
It resets by clearing the BUSY flag set to (step 660), returns the processing to step 610, and continues the same processing as described above .

As described above, in the emulator device of this embodiment, the virtual PLC unit 11 virtualizes the PLC 51 on the data transmission side, and the virtual PLC 12 is also used.
Is a virtualized version of the PLC 51 on the data receiving side, and the first transmission path emulator means 13 or the second transmission path emulator means 14 controls transmission of the data to be transmitted. Also, in cyclic communication, emulation of the data transmission of the FA system can be performed.

Moreover, the first transmission line emulator means 13
Alternatively, the second transmission path emulator means 14 can check the duplication of the registered network addresses by referring to the node allocation table 17 when registering the network addresses of the PLCs 50 and 51 that form the FA system as the communication system. .

Particularly, when the registered network addresses are duplicated, the first transmission path emulator means 13 or the second transmission path emulator means 14 displays the node and the network address of the node on the display screen. Therefore, a network address registration error can be easily found.

Further, when the first transmission path emulator means receives the transmission data from the virtual PLC unit 11, the emulator device of this embodiment delays the received transmission data by # 1 to #n after a predetermined time delay. Virtual PLC unit 12
PLC that constitutes the FA system of the actual machine for transmission to the
Data transmission between 51 can be reproduced in a pseudo manner, and a bug relating to communication timing, which can be found only by a running test of an actual machine, can be detected in a pseudo manner.

The emulator device of this embodiment does not detect the original bug of the program (bug of processing procedure or the like).

[0079]

As described above, according to the present invention, when transmission data is received from one virtualized communication device, the virtualized transmission path emulator means delays the received transmission data for a predetermined time and then virtualizes it. For transmission to other communication devices,
The communication timing delay can be simulated.

Therefore, it is possible to efficiently execute the debug test of the processing program executed in the FA system of the actual machine without using the actual machine on site.

Further, when registering the network address of the communication device that constitutes the communication system, the duplication of the registered network addresses is checked, so that an erroneous network address registration error can be prevented.

In particular, when the registered network addresses are duplicated, by displaying the node and the network address of the node on the display screen,
It is possible to easily find a network address registration error.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an FA system emulated by an emulator device according to the present invention.

FIG. 2 is a block diagram showing the module configuration of the FA system displayed in FIG.

FIG. 3 is a block diagram showing the configuration of an embodiment of an emulator device according to the present invention.

FIG. 4 is a block diagram showing the configuration of a node allocation table in FIG.

FIG. 5 is a flowchart showing network address registration and duplicate registration check processing executed by the emulator device of this embodiment.

FIG. 6 is a flowchart showing an emulation process executed by a first virtual communication unit or a second virtual communication unit on the data transmission side in event communication.

FIG. 7: # on the side receiving data in event communication
6 is a flowchart showing emulation processing executed by the virtual communication units 1 to #n.

FIG. 8 is a flowchart showing emulation processing executed by first transmission path emulator means in event communication.

FIG. 9 is a flowchart showing an emulation process executed by a virtual communication unit in cyclic communication.

FIG. 10 is a flowchart showing emulation processing executed by second transmission path emulator means data in cyclic communication.

FIG. 11 is a schematic configuration diagram of a conventional FA system.

[Explanation of symbols]

11 Virtual PLC section (data transmission side) 111 Virtual communication unit means 12 Virtual PLC section (data receiving side) 121 Virtual Communication Unit Means 13 First transmission line emulator means 14 Second transmission line emulator means 15 Shared memory for event communication 16 Shared memory for cyclic communication 17-node allocation table 171 Node No. storage area 172 network address storage area 18 BUSY flag storage memory 19 Program storage memory 50 PC PLC 501 software PLC unit 502 Communication unit 51 PLC 511 PLCY unit 512 communication unit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-35534 (JP, A) JP-A-8-153019 (JP, A) JP-A-8-317057 (JP, A) JP-A-9- 224083 (JP, A) JP 7-152679 (JP, A) JP 62-206619 (JP, A) JP 3-19499 (JP, A) JP 8-286953 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G05B 19/00-19/16 G05B 15/00-15/02 G05B 24/00-24/04 G06F 11/28 340

Claims (3)

(57) [Claims] 1. An emulation method for virtualizing an FA system having a plurality of communication devices and artificially reproducing a communication timing delay, the network address being registered in correspondence with a node of the communication device configuring the FA system. Check the duplicate registration of the first, and the first virtualization communication method is the debug test target program.
After the execution of the RAM , if the transmission data is stored in the shared memory for event communication, the transmission data for the event communication is also transmitted to the shared memory for cyclic communication.
Is stored, the transmission for cyclic communication is performed.
The transmit data, and sends to the transmission path respectively emulator unit, the transmission channel emulator means, the transmission data transmitted, after a predetermined delay time, and transmitted to the second virtualization communication means, receiving said transmission The second virtual communication means received
If it is determined that the transmission data is for the event communication addressed to the own node based on the network address of the transmission data, the transmission data is written in the event communication shared memory , and if the transmission data is for the cyclic communication, An emulation method characterized by performing a process of writing transmission data to a shared memory for cyclic communication. 2. An emulation device for simulating an FA system having a plurality of communication devices, the network address registering a network address of the communication device corresponding to a node of the communication device configuring the FA system. Registration means, duplication checking means for checking the duplication of the registered network address by referring to the network address registration means when registering the network address, and event communication for storing transmission data for event communication
A shared memory, a shared memory for cyclic communication for storing transmission data for cyclic communication, after executing debug test target program, if the previous SL transmit data in the shared memory for the event communication is stored, the transmission data for the event communication, also in the case where the transmission data to said cyclic shared memory for communication is stored, first transmits the transmission data of the cyclic communication, each transmission line emulator unit 1 Receiving the transmission data from the first virtualization communication means and the first communication means, the received transmission data is delayed by a predetermined time.
Chi, said transmission line emulator means for transmitting to the second virtualization communication means, receiving said transmission data which the transmission channel emulator means has transmitted the transmission data thereof received is a in the transmission data for event communication And the transmission data
If it is addressed to its own node based on the network address ,
The transmission data is sent to the reception key of the shared memory for event communication.
In case of the transmission data for cyclic communication , refer to the node allocation table for the transmission data .
Te, emulator apparatus characterized by having a said <br/> second virtualization communication means to be stored in the cyclic shared memory for communication. 3. If the registered network address is checked by the duplication checking means for duplication, the display screen has a display means for displaying the node and the network address of the node. The emulator device according to claim 2.