KR101576044B1 - Method for checking plural node condition using check bits and system thereof - Google Patents

Abstract

The present invention relates to a technology for transmitting industrial large-amount object data. Particularly, a master node can selectively check information of a datagram according to a state bit as a check field area capable of checking an operation state of a slave node is added in a control frame and the master node checks whether the salve node normally operates. Therefore, load of an on-the-fly type network control system which is generated by calculation can be significantly reduced.

Description

Method and System for Checking Multiple Node States Using Status Bits [

The present invention relates to an industrial mass object data transmission technology, and more particularly, to a technology for adding a check field area for checking the operation state of a slave node in a control frame, And more particularly, to a method and system for identifying a plurality of nodes using a plurality of nodes.

The contents described in this section merely provide background information on the present embodiment and do not constitute the prior art.

The industrial network system used in the automobile industry or the robot industry has been continuously developed to meet various requirements required in the industrial field. Various industrial networks such as CC-Link, CAN-based DeviceNet and CAN Open, and SERCOS, which is a communication interface for motion control applications, developed and developed by G Company in the 1970s led to the development of production automation network, Has evolved.

And recently, as the production technology rapidly develops, the requirements of the industrial network to obtain more efficient and reliable results are continuously increasing. In addition, since the actuator level and the sensor level in a factory automation system using an industrial network are gradually replaced with a digital signal transmission type, there is an increasing need for integration into an intelligent smart actuator using various microprocessors.

In line with this trend, the application of communication protocol systems based on Ethernet is emerging as the mainstream for industrial communication networks used in factory facilities, process control facilities, building automation and infrastructure.

However, industrial mass-data transmission technology uses PROFINET (RT, IRT), POWERLINK, Ethernet / Ethernet, etc., considering the technical aspects, standardization status and strategic market among 30 industrial Ethernet systems based on Industrial Ethernet. IP, EtherCAT and SERCOS Ⅲ, but it is difficult to develop data transmission technology for system control.

At this point, the Ethernet transmission method based on the industrial Ethernet communication method is widely used as the strength of the configuration and scalability, but it has a disadvantage of adding a lot of information in order to transmit a small amount of data such as control data.

The market expansion of industrial Ethernet technology can predict the dominance of Ethernet technology in the market as a result of the development of Ethernet-based communication technology due to automation of industrial facilities. Recently, Industrial Ethernet based data transmission technology has reached technical limit , And the necessity of development of mass object data transmission technology that can overcome this is increasing.

In particular, as the next generation power network develops, data transmission technology for controlling more than 1,000 nodes simultaneously becomes necessary, and it is time to develop technology to satisfy the service quality in real time.

Korean Registered Patent No. 10-1102120 B1, Registered on December 27, 2011 (Name: Diagnosis method of channel fault of I / O module in fieldbus network and diagnostic information generating device using the method)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the conventional inconveniences and it is an object of the present invention to provide a method and apparatus for controlling a plurality of slave nodes in on- And receives a response frame for the control frame. When receiving the response data for the control frame, it checks the datagram information corresponding to the specific status bit set to the designated value, and performs a validity test for the normal operation. And to provide a node status checking method and system.

According to an aspect of the present invention, there is provided a system for verifying a plurality of nodes using status bits, comprising: a plurality of status bits respectively corresponding to a plurality of slave nodes; When receiving the response frame for the control frame, checks the datagram information corresponding to each status bit set to the designated value and checks whether the corresponding slave node is operating normally When a control frame sequentially transmitted from a node and a master node or another slave node is received, information to be reported to the master node is additionally stored in a specific datagram, a status bit corresponding to the information is set to a specified value, The control frame containing the status bits is called the master node It characterized in that it comprises a plurality of slave nodes for transmitting to one of the other slave nodes.

In addition, in the plurality of node status checking systems using the status bits according to the present invention, the control frame is sequentially transmitted to the remaining slave nodes located on the on-the-fly network starting from the slave node connected to the master node, And returns to the master node again.

In addition, in the plurality of node status checking systems using the status bits according to the present invention, the slave node may include a communication module for forming a communication channel, transmitting and receiving a control frame through a communication channel, A data processing module for confirming the datagram and transmitting the control frame to the master node or another slave node after confirmation, and an operation performing module for controlling to perform an operation corresponding to the datagram.

A method of verifying a plurality of nodes using state bits according to an embodiment of the present invention is a method in which a master node generates a control frame including a plurality of state bits corresponding to a plurality of slave nodes and a plurality of datagrams corresponding to a plurality of state bits A master node receiving response data for a control frame, and a master node selectively checking datagram information corresponding to each status bit set to a designated value to determine whether the corresponding slave node is operating normally And inspecting the image.

In the method for checking the status of a plurality of nodes using status bits according to the present invention, the step of checking normal operation may include a step of the master node checking the status bits contained in the check field in the control frame, And determining whether the slave node is operating normally according to the determination result.

In the method for identifying a plurality of nodes using status bits according to the present invention, the status bits are bits that can distinguish between normal operation and abnormal operation of each slave node.

A method for checking a plurality of nodes using a status bit according to an embodiment of the present invention includes receiving a control frame sequentially transmitted from a master node or another slave node and determining whether the slave node transmits information to be reported to the master node Storing a status bit corresponding to the information in the control frame; setting a status bit corresponding to the information to a designated value; and transmitting a control frame including a status bit set by the slave node to the master node or another slave node To the one of the plurality of devices.

As another means for solving the problem of the present invention, there is provided a method for controlling a slave node, comprising: transmitting a control frame including a plurality of status bits and a plurality of datagrams corresponding to a plurality of status bits respectively corresponding to a plurality of slave nodes; Receiving response data and selectively checking datagram information corresponding to each status bit set to a specified value to check whether the corresponding slave node operates normally or not. to provide.

As another means for solving the problem of the present invention, there is provided a method for controlling a master node, comprising: receiving a control frame sequentially transmitted from a master node or another slave node; Setting a status bit corresponding to the information to a specified value, and transferring a control frame including the set status bit to one of a master node and another slave node, Lt; / RTI >

According to the present invention, a status bit for checking the operation status of each slave node is added, and a bit having a status bit of 0 is confirmed as having a report on the status of the slave node, The master node can reduce the computation burden by not confirming the contents of the datagram of the slave node of the bit whose status bit is 1. [ That is, the master node can selectively check the information of the datagram according to the status bit, so that the load due to the operation of the on-the-fly network control system can be remarkably reduced.

1 is a diagram illustrating a configuration of a plurality of node status checking systems using status bits according to an embodiment of the present invention.
2 is a diagram illustrating an example of transmitting a control frame to a plurality of slave nodes by applying an on-the-fly method according to an embodiment of the present invention.
3 is a diagram illustrating a structure of a control frame transmitted from a master node to a plurality of slave nodes according to an embodiment of the present invention.
4 is a diagram showing a specific configuration of a master node in a plurality of node status checking systems according to an embodiment of the present invention.
5 is a diagram illustrating a specific configuration of a slave node in a plurality of node status checking systems according to an embodiment of the present invention.
6 is an operation flowchart of a master node for explaining a plurality of node status checking methods using status bits according to an embodiment of the present invention.
7 is a flowchart illustrating an operation of a slave node for explaining a plurality of node status checking methods using status bits according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings and the inventor is not limited to the concept of terminology for describing his or her invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a plurality of node status checking systems using status bits according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating a configuration of a plurality of node status checking systems using status bits according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a configuration of a plurality of slave nodes FIG. 3 is a diagram illustrating a structure of a control frame transmitted from a master node to a plurality of slave nodes according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 1, a plurality of node status checking systems according to an embodiment of the present invention are systems for industrial mass object data transmission, and include a master node 100 and a plurality of slave nodes (not shown) connected through a communication network 200).

The master node 100 and the plurality of slave nodes 200 are a large number of nodes installed in an industrial field, and may include a power supply facility, a driving apparatus, a manufacturing facility, and the like.

The master node 100 is an object for controlling a plurality of slave nodes 200 in an industrial field and is composed of a plurality of slave nodes 200 connected in an on-the-fly manner and having different data sizes and formats from each other , A datagram matched to each slave node may be transmitted on a control frame.

The master node 100 transmits a control frame including a plurality of status bits corresponding to the plurality of slave nodes 200 and a plurality of datagrams corresponding to the plurality of status bits to the adjacent slave node. Then, the master node 100 checks whether response data (feedback) to the control frame is received. Here, the control frame is sequentially transmitted to the remaining slave nodes located on the on-fly network starting from the slave node connected to the master node 100, and then returned to the master node 100 again.

The master node 100 selectively checks datagram information corresponding to a specific status bit set to a designated value (0 or 1) as response data for a control frame including a plurality of datagrams is received, And performs a check for normal operation of the apparatus. Here, the status bit is a bit that can distinguish between normal operation (status bit '0' or '1') and abnormal operation (status bit '1' or '0') of each slave node. At this time, the master node 100 can check the status bits included in the check field of the control frame, and determine whether the normal operation is performed according to the status bits.

3, the control frame includes a header area 10, a check field area 20, a plurality of datagram areas 31, 32, ..., 3n in the control data, and a CRC area 40, . Here, the header area may include simple information on the mode information and the control frame. Also, the check field area includes status bits 21, 22, ..., 2n for datagrams returned for each slave node. For example, if the slave node is in a normal operation, the status bit may be indicated by a pre-set '0' bit in the check field region, and if the slave node is in an abnormal state, .

2, the master node 100 includes datagrams (control data) in a plurality of slave nodes 200 located on the path of the ring structure during a control period in an on-the-fly manner It is possible to transmit the configured control frame. Here, the control frame may be generated in the master node 100, transmitted to the plurality of slave nodes 200, and may be returned to the master node 100 through all of the slave nodes 200 sequentially connected thereto. At this time, the control frame returned to the master node 100 may include a status bit for checking whether the slave node is normally operated.

When the control frame sequentially transmitted to the plurality of slave nodes 200 located on the path of the ring structure is returned, the master node 100 transmits the control result information included in the control frame, the current status information, Response information, etc., and confirm the requested information, the control result, and the state of each slave node 200. [

The plurality of slave nodes 200 analyze the control frame transmitted from the master node 100 or the previous slave node 200 and take their own information and write a status bit ('0' or '1' 'To the next slave node 200 or the master node 100. If the control frame or the upgrade information is not included in the datagram matching the received control frame, the plurality of slave nodes 200 transmits a status bit ('0' or ' 1 ') to the next slave node 200 or the master node 100.

If the control information or upgrade information in the received control frame is included, the plurality of slave nodes 200 extract their own control information or upgrade information, and perform control operations or software corresponding to the extracted control information or upgrade information An upgrade operation can be performed.

That is, the slave node 200 receives control frames sequentially transmitted from the master node 100 or another slave node. The slave node 200 stores information to be reported to the master node 100 in a specific datagram in the control frame. After that, the slave node 200 sets a specific status bit to be mapped with the normal operation status to a designated value, and delivers a control frame including the set status bit to the master node 100 or another adjacent slave node.

Accordingly, the present invention adds a status bit to check the operation status of each slave node, and confirms that the bit having a status bit of 0 has a report on the status of the slave node, The master node can reduce the computation burden by not confirming the contents of the datagram of the slave node of the bit whose status bit is 1. [ That is, the master node can selectively check the information of the datagram according to the status bit, so that the load due to the operation of the on-the-fly network control system can be remarkably reduced.

Hereinafter, a specific configuration of the master node 100 will be described in detail with reference to the accompanying drawings.

4 is a diagram showing a specific configuration of a master node in a plurality of node status checking systems according to an embodiment of the present invention.

4, a master node 100 according to an embodiment of the present invention may include a controller 110, a communication unit 120, and a storage unit 130. Here, the control unit 110 generates a datagram in the control data in the control frame to control the plurality of slave nodes 200, and sequentially transmits the control frame to the plurality of slave nodes 200. For this, the control unit 110 may include a datagram generation module 111 and a check field confirmation module 112.

The datagram generation module 111 generates control information for controlling each of the plurality of slave nodes 200 located on the path of the ring structure as a datagram and transmits the generated datagram to a slave node 200).

Particularly, the datagram generation module 111 can be configured by dividing a control frame into a header area 10, a check field area 20, a datagram area 30 in the control data, and a CRC area 40. Here, the check field area 20 includes status bits 21, 22, ..., 2n for the datagrams stored and matched for each slave node.

The check field confirmation module 112 selectively checks a status bit (set to a designated value) for checking whether the slave node is normally operating with respect to control data, and performs a check for a normal operation. Here, the check field confirmation module 112 can check the status bits included in the check field of the control frame, and determine whether to operate normally according to the status bits.

The communication unit 120 may transmit the control frame generated by the control unit 110 to the slave node 200. Also, the communication unit 120 sequentially receives the response data corresponding to the control frame that is returned after being sequentially transmitted to the remaining plurality of slave nodes 200 located on the path of the ring structure in an on-the-fly manner, To the control unit 110.

The storage unit 130 stores information necessary for operation of the master node 100, and may store the generated control information, upgrade information, and received response information. The storage unit 130 may be an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk, and a magnetic tape, a compact disk read only memory (CD-ROM), and a digital video disk (DVD) A magneto-optical medium such as a floppy disk and a ROM, a random access memory (RAM), and a flash memory.

Next, the specific configuration of the slave node will be described in detail with reference to the accompanying drawings.

5 is a diagram illustrating a specific configuration of a slave node in a plurality of node status checking systems according to an embodiment of the present invention.

Referring to FIG. 5, a plurality of slave nodes 200 according to an embodiment of the present invention may include a communication module 210, a data processing module 220, and an operation performing module 230.

The communication module 210 may receive the control frame sequentially transmitted on the path of the ring structure, and may transmit the received control frame to the data processing module 220. In addition, the communication module 210 performs an operation according to the control information and the upgrade information included in the datagram of the control data in the control frame, and outputs response information on the operation state, the current state, Bit and the control frame to which the status bit is added can be transmitted to the next slave node 200 or the master node 100. [

The data processing module 220 transfers the control frame received through the input port to the master node 100 or another slave node through the output port. That is, the data processing module 220 analyzes the datagram included in the control data in the control frame received from the communication module 210, extracts only the control information matched with the received datagram, and transmits the extracted control information to the operation performing module 230 ). ≪ / RTI > When the received operation control information or upgrade information is included in the received control frame, the data processing module 220 extracts operation control information or upgrade information matching with the received operation control information or upgrade information, Control operation or software upgrade function. In addition, the data processing module 220 may add the status bit to the check field area in the response data control frame corresponding to the operation status, and may transmit the status bit to the next slave node or the master node.

The operation performing module 230 can control the overall operation of the slave node 200 and can grasp and manage the state of the slave node 200. The operation performing module 230 may perform an operation corresponding to the operation control information transmitted from the data processing module 220. In addition, the operation performing module 230 can grasp the result of the operation and the response information according to the operation request and the information on the current state, and transmit the determined one or more pieces of information to the data processing module 220.

Hereinafter, a method of verifying a plurality of nodes using a status bit according to an embodiment of the present invention will be described in detail.

6 is an operation flowchart of a master node for explaining a plurality of node status checking methods using status bits according to an embodiment of the present invention.

Referring to FIG. 6, in the method of verifying a plurality of nodes using state bits according to an embodiment of the present invention, the master node 100 generates a plurality of state bits corresponding to a plurality of slave nodes 200 in step S11, And a plurality of datagrams corresponding to the plurality of status bits. Here, the control frame may be composed of a header area 10, a check field area 20, a plurality of datagram areas 31, 32, ..., 3n in the control data, and a CRC area 40. Here, the header area may include simple information on the mode information and the control frame. Also, the check field area includes status bits 21, 22, ..., 2n for datagrams returned for each slave node. For example, if the slave node is in a normal operation, the status bit may be indicated by a pre-set '0' bit in the check field region, and if the slave node is in an abnormal state, . The control frame is sequentially transmitted from the slave node connected to the master node 100 to the remaining slave nodes located on the on-fly network, and then returned to the master node 100 again.

In step S13, the master node 100 determines whether response data associated with the control data included in the control frame transmitted from the slave node is received.

When the response data is received, the master node 100 confirms the specific status bit set to the value specified in step S15. For example, the status bit may be represented by a '0' bit if the slave node is in an operational state, and may be represented by a '1' bit if the slave node is in an abnormal state.

Then, the master node 100 selectively checks the datagram information corresponding to the status bits identified in step S17 and performs a validity check on the normal operation. At this time, the master node 100 can check the status bits included in the check field of the control frame, and determine whether each slave node operates normally according to the status bits.

7 is a flowchart illustrating an operation of a slave node for explaining a plurality of node status checking methods using status bits according to an embodiment of the present invention.

Referring to FIG. 7, in the method of verifying a plurality of nodes using status bits according to the embodiment of the present invention, the slave node 200 sequentially transmits the status bits from the master node 100 or another adjacent slave node in step S21 And receives a control frame.

The slave node 200 further stores information to be reported to the master node in the specific datagram in the control frame in step S23. Here, the slave node 200 analyzes the datagram included in the control data in the control frame and extracts only its own control information. If control information in the received control frame or upgrade information is included, Information is extracted. The slave node 200 may perform a control operation or a software upgrade operation corresponding to the extracted control information or upgrade information.

In step S25, the slave node 200 sets a specific status bit to a designated value. For example, if the slave node 200 is in a normal operation, the status bit in the check field is indicated by a '0' bit, and if the operation state is abnormal, the slave node 200 may display a status bit by a '1' bit. Thereafter, the slave node 200 transmits a control frame including the status bits set in step S27 to the master node 100 or another adjacent slave node.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

In addition, while the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the features that may be specific to a particular embodiment of a particular invention Should be understood as an explanation. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

The present invention provides a control frame including a plurality of status bits corresponding to a plurality of slave nodes and a plurality of datagrams corresponding to a plurality of status bits in order to control a plurality of slave nodes on an on- And upon receipt of a response to the control frame, selectively checks the datagram information corresponding to the specific status bit set to the designated value to perform a check for normal operation. Accordingly, the present invention adds a status bit to check the operation status of each slave node, and confirms that the bit having a status bit of 0 has a report on the status of the slave node, The master node can reduce the computation burden by not confirming the contents of the datagram of the slave node of the bit whose status bit is 1. [ That is, the master node can selectively check the information of the datagram according to the status bit, so that the load due to the operation of the on-the-fly network control system can be remarkably reduced. This is not only a possibility of commercialization or sales, but also a possibility of being industrially applicable since it is practically possible to carry out clearly.

100: master node 200a, 200b, ... , 200n: slave node
110: control unit 120: communication unit
130: storage unit 111: datagram generation module
112: check field confirmation module 210: communication module
220: data processing module 230: operation performing module
10: header 20: check field
30: Datagram 40: CRC

Claims (9)

A control frame including a plurality of status bits respectively corresponding to a plurality of slave nodes and a plurality of datagrams corresponding to the plurality of status bits, and when response data for the control frame is received, And only when the respective status bits are set to the predetermined values, it is possible to selectively check the datagram information corresponding to the status bits and determine whether the corresponding slave node is operating normally, A master node for checking whether it has been delivered normally; And
When the control frame sequentially transmitted from the master node or another slave node is received, information to be reported to the master node is additionally stored in a specific datagram, a status bit corresponding to the information is set to a designated value The plurality of slave nodes transmitting a control frame including the set state bits to one of the master node and the other slave nodes;
And a plurality of node statuses using the status bits. 2. The apparatus of claim 1,
The slave nodes connected to the master node are sequentially transmitted to the remaining slave nodes located on the on-fly network, and finally the master node is returned to the master node. . 2. The method of claim 1, wherein the slave node
A communication module for forming a communication channel and transmitting and receiving a control frame through the communication channel;
A data processing module for confirming a datagram of the control frame received through the communication module and transmitting the control frame to the master node or another slave node after the confirmation; And
Performing an operation corresponding to the datagram;
And a plurality of node status verification systems using the status bits. Transmitting a control frame including a plurality of status bits corresponding to a plurality of slave nodes and a plurality of datagrams corresponding to the plurality of status bits;
The master node receiving response data for the control frame; And
The master node checks the status bits contained in the check field in the control frame and selectively checks the datagram information corresponding to the status bit only when each status bit is set to a predetermined value, Checking whether normal operation and control information or upgrade information are normally transmitted;
And a plurality of node statuses using the status bits.
delete 5. The method of claim 4,
Wherein each of the slave nodes is a bit that can distinguish between a normal operation and an abnormal operation. delete Transmitting a control frame including a plurality of status bits respectively corresponding to a plurality of slave nodes and a plurality of datagrams corresponding to the plurality of status bits;
Receiving response data for the control frame; And
Checks the status bits included in the check field in the control frame and selectively checks the datagram information corresponding to the status bits when each status bit is set to a predetermined value, And checking whether control information or upgrade information has been normally transmitted.
delete

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