CN105652785A - PLC (programmable logic controller) communication module based on IEC (international electrotechnical commission) 60870-5-104 telecontrol protocol - Google Patents

PLC (programmable logic controller) communication module based on IEC (international electrotechnical commission) 60870-5-104 telecontrol protocol Download PDF

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Publication number
CN105652785A
CN105652785A CN201610214484.9A CN201610214484A CN105652785A CN 105652785 A CN105652785 A CN 105652785A CN 201610214484 A CN201610214484 A CN 201610214484A CN 105652785 A CN105652785 A CN 105652785A
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China
Prior art keywords
data
plc
iec60870
module
communication module
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CN201610214484.9A
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Chinese (zh)
Inventor
于海斌
徐皑冬
刘明哲
孙俊男
闫炳均
宋岩
郭廷廷
韩晓佳
张凝
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Shenyang Institute of Automation of CAS
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Shenyang Institute of Automation of CAS
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Priority to CN201610214484.9A priority Critical patent/CN105652785A/en
Publication of CN105652785A publication Critical patent/CN105652785A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/058—Safety, monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
    • H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/26—Special purpose or proprietary protocols or architectures
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14006—Safety, monitoring in general

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Programmable Controllers (AREA)

Abstract

The invention relates to a PLC (programmable logic controller) communication module based on the IEC (international electrotechnical commission) 60870-5-104 telecontrol protocol. The PLC communication module is characterized in that a protocol logic controller is connected with an IEC60870-5-104 telecontrol protocol master station through an Ethernet port, performs communication by means of a socket communication technology and performs analysis after receiving a data instruction from the IEC60870-5-104 telecontrol protocol master station; the protocol logic controller is connected with a module data storage area and stores analyzed data to the module data storage area; a data mirror is connected with the module data storage area and enables data in the module data storage area to have data communication with a buffer area in a PLC controller. The PLC communication module is used for data acquisition, processing and control of industrial scenes, especially industrial scenes with widely distributed equipment, the system is independent, the communication is stable, and the interoperability and the reliability are high.

Description

A kind of plc communication module based on IEC60870-5-104 Telecontrol Protocol
Technical field
The present invention relates to industrial communication field, specifically a kind of plc communication module based on IEC60870-5-104 Telecontrol Protocol.
Background technology
IEC60870-5-104 stipulations are to be formulated in August, 1998 by International Electrotechnical Commission (IEC), and China also formulated corresponding planning standard DL/T634.5104-2002 in 2002. It is based on modern electronic technology and electronic computer technology, applies telecommunication technique, the equipment of transformer station in the distance or power plant is monitored and controls, and mainly achieves the various functions of long-range measurement, remote signal, remotely control and remote adjustment. These stipulations have been obtained for comparing at power domain at present and are widely applied.
Currently, China's economic enters new developmental stage. The U.S. is just being devoted to industry internet exploitation, and Germany actively pushes forward industry 4.0, and China proposes the ideas of development such as " made in China 2025 ", " the Internet+". The basis of all these new demands all be unable to do without technology and the product in control based on network field. At industrial control field, PLC by it is powerful, apply the advantage such as simple and be increasingly subject to everybody welcome, again because IEC60870-5-104 Telecontrol Protocol has reliability height, real-time is good, data traffic is sufficient, support the plurality of advantages such as network transmission, the plc communication module based on these stipulations will play a significant role in industry internet field.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of plc communication module based on IEC60870-5-104 Telecontrol Protocol, is used for industry spot, the especially collection of the industrial field data that device distribution is wider, process and control.
The present invention be the technical scheme is that for achieving the above object
A kind of plc communication module based on IEC60870-5-104 Telecontrol Protocol, it is connected with IEC60870-5-104 Telecontrol Protocol main website by ethernet port including stipulations logic controller, communicated by socket communication technology, resolve after receiving IEC60870-5-104 Telecontrol Protocol main website data command;
Data after resolving are stored module data memory block by stipulations logic controller link block data storage area;
Data in module data memory block are carried out data communication with the relief area in PLC by data image link block data storage area.
Described module data memory block includes storage input area and storage output area;
Described data image includes input data image and output data image;
Described relief area includes input block and output buffer.
Described storage input area, by inputting the input block of data image and PLC, carries out correspondence according to address side-play amount;
The input block of PLC is also connected with status information memory block and the input data storage area of PLC, carries out status information and the storage of input data respectively;
Described storage output area, by exporting the output buffer of data image and PLC, carries out correspondence according to address side-play amount;
The output buffer of PLC is also connected with the output data storage area of PLC, reads output data.
Described corresponding process is, by configuration tool and PLC configuration software, data type and the period configuration of demand are generated JSON file, and described module reads this JSON file, configures systematic parameter, and it is corresponding with plc data address to complete module.
Described module includes embedded controller AT91M40800 and the 10/100M self adaptation ethernet controller LAN9218i-MT of ARM7 kernel.
Module passes through 104 stipulations main logic threads, it is achieved IEC60870-5-104 Telecontrol Protocol, meets reliability communication, transmission control, connects the requirement that effectiveness is monitored.
Described module adopts embedded real-time multi-task operating system to carry out multi-task scheduling.
The invention have the advantages that and advantage:
1. the equipment that industry spot is distributed more widely can be controlled. IEC60870-5-104 stipulations are Telecontrol Protocols, the earliest for power system, are stipulations transformer station distributed more widely being monitored and controlling, and these stipulations are used in industrial circle, it is possible to monitor and control equipment distributed more widely.
2. system is independent. The present invention, as the expansion module of PLC, has independent hardware platform and operating system, does not disturb that PLC's is properly functioning.
3. communication robust. Present invention achieves the reliability communication need of IEC60870-5-104 Telecontrol Protocol, meanwhile, add system status information feedback, the function such as errors repair.
4. interoperability is strong. The present invention develops configuration tool when design, it is possible to for different master device, different application environment, carry out the configuration of systematic parameter.
5. reliability is high. Present invention achieves the requirement to reliability in IEC60870-5-104 Telecontrol Protocol, meanwhile, the functions such as design adds system status information feedback, errors repair.
Accompanying drawing explanation
Fig. 1 is the general frame figure of the present invention;
Fig. 2 is the protocol architecture figure of the present invention;
Fig. 3 is the network thread state machine diagram of the present invention;
Fig. 4 is the 104 stipulations main logic state machine diagrams of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention, by devising a kind of plc communication module based on IEC60870-5-104 Telecontrol Protocol, solves the application in industrial communication field of the IEC60870-5-104 Telecontrol Protocol. To achieve these goals, technical scheme is as follows:
The present invention relates to following items key technology:
(1) being illustrated in figure 1 the general frame figure of the present invention, hardware platform is mainly made up of as the ethernet controller of system the AT91M40800 of the ARM7 kernel master controller as system and 10/100M self adaptation ethernet controller LAN9218i-MT.Communicated by core bus technology and PLC, communicated with IEC60870-5-104 Telecontrol Protocol main website by Ethernet interface.
Plc communication module adopts NucleusPLUS operating system to carry out multi-task scheduling, is divided into configuration file to read thread, network thread, data thread, 104 stipulations main logic threads;
The parameter of module can configure according to the difference of field demand;
Module data arrangement can continuously can also be discrete;
Module can meet the requirement of IEC60870-5-104 Telecontrol Protocol.
(2) the protocol architecture figure of the present invention it is illustrated in figure 2, what IEC60870-5-104 stipulations bottom adopted is the protocol subset of TCP/IP, being connected to application layer by the interface of user to TCP, the application layer of these stipulations is divided into application stipulations to control information (APCI) and Application service data unit (ASDU). Wherein APCI includes reliability communication, transmission controls, connect effectiveness monitoring. ASDU includes the part data type in IEC60870-5-104 Telecontrol Protocol.
(3) configuration file reads thread, demand according to different industry spot, the point of differently configured function and varying number, and it is corresponding with PLC data address to complete module by the configuration software of PLC, generate a JSON configuration file, giving 104 communication modules by backplane communication technology transfer, it is resolved by module, completes the configuration of series of parameters.
(4) network thread, by socket communication technology, completes and the communication of IEC60870-5-104 main website; Network thread state machine diagram is as shown in Figure 3 and Table 1:
# Event
S1 Connection request
S2 T1 time-out
S3 K value overflows
S4 N (R) is discontinuous
Table 1
IEC60870-5-104 stipulations are based on the stipulations of TCP/IP, therefore need ICP/IP protocol stack is transplanted to system platform. After initialization thread completes with configuration file reading thread, initialize ICP/IP protocol stack, and start network thread.
(5) data thread, by module stores is divided into input and output Liang Ge district, each district carries out correspondence respectively at the memory block of PLC by address offset amount, completes data transmission. Meanwhile, data and order are analyzed by this thread, process.
In equipment running process, PLC needs the data by the process of field apparatus to be sent to 104 communication modules, and by module, these data are sent to main website according to the requirement of 104 stipulations, and main website also needs to be sent to control command the equipment of PLC, this is accomplished by the data transmission rule of self-defined a kind of PLC and 104 communication modules. PLC defines relief area 3 pieces independent, namely input block, output buffer, status information relief area, 104 communication modules pass through the corresponding table of the address offset amount of configuration file by corresponding with PLC output buffer for the monitoring direction procedural information of stipulations, by corresponding with PLC input block for the procedural information controlling direction of stipulations, status information in module running is corresponding with the status information relief area of PLC, by the mode of cycle polling, to PLC request or the mirror image sending data. It is achieved thereby that the data of PLC and 104 communication modules exchange.
(6) 104 stipulations main logic threads, after data thread starts, and main website has been connected with this 104 communication module Socket, will start 104 stipulations main logic threads, and this thread is the core that module realizes 104 stipulations.
104 stipulations main logic threads, it is achieved IEC60870-5-104 Telecontrol Protocol, are specially reliability communication, transmission control, connect the requirements such as effectiveness monitoring, type of message;
Reliability communication, by the N that transmits Sequence Number (S) and receiving sequence N (R), k, w mechanism and timer mechanism realize.
Transmission controls, and is realized by STARTDT order and STOPDT order.
Connect effectiveness monitoring, realized by TESTFR order.
As shown in Figure 4, state transition table is as shown in table 2 for 104 stipulations main logic state machines.
# Event
S1 STARTDT asks
S2 StopDT asks
S3 TESTFR confirms
S4 TESTFR confirms
S5 T3 time-out
S6 Remote measurement changes
S7 W value overflows
S8 Command request
S9 Send successfully
S10 Command request
S11 Data update
S12 Accept successfully
Table 2
After this thread starts, network thread is constantly in the state monitoring network data, until the transmission receiving main website controls message STARTDT (U form), the data transmit-receive of module enters SBR, data-transformation facility starts, after the transmission receiving main website controls message STOPDT (U form), the data that module stops with main website are transmitted, until main website sends STARTDT message again.
104 communication modules and master station communication are broadly divided into two parts content, and one is in response to the order of main website, and two is send in the active of slave station delta data.
The order of main website mainly have total calling, group calling, electric energy cumulative amount always call (distant arteries and veins is always called), pair time order, control command. The flow chart of response main website order as it can be seen, receive main website always call with organize calling order after, according to the quantity of the point configured and address arrangement mode, point single frames and continuous multiple frames are to main website response; When receiving pair after order, then proofread according to the main station time received the time of this 104 communication module, and with pair time order mirror image send to main website and to confirm response; Receive control command and then first judge command type, if controlling to select order, then judge whether controlled period exists, if existing with order mirror image response, if controlling to perform order, then control command is sent to the input block of PLC, perform this order, if order is cancelled, then the state before control command being performed is sent to the discrepancy relief area of PLC, cancels this order.
The active of slave station delta data is sent and mainly has remote signalling displacement and telemetry to cross over two kinds of dead band situation. The state of remote signalling displacement this remote signalling point i.e. is closed from point becoming, conjunction become point, then one event of generation, and on the time, the remote signalling period address of this displacement, displacement information, displacement are delivered to main website; Telemetry crosses over the dead band i.e. excursion of this this secondary data of telemetry station more than the dead band numerical range configured for this point, then produce an event, and will deliver to main website on the period information of the point of this change, currency, transformation period.
It addition, for the effectiveness ensureing reliability communication and connection, start TCP when thread performs and connect overtime timer t0, frame acknowledgment overtime timer t1, without I frame timeout send S frame timer t2With time-out monitoring timing intervalometer t3, according to stipulations requirement, guarantee that this module meets the requirement of 104 stipulations.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed in protection scope of the present invention.

Claims (7)

1. the plc communication module based on IEC60870-5-104 Telecontrol Protocol, it is characterized in that, it is connected with IEC60870-5-104 Telecontrol Protocol main website by ethernet port including stipulations logic controller, communicated by socket communication technology, resolve after receiving IEC60870-5-104 Telecontrol Protocol main website data command;
Data after resolving are stored module data memory block by stipulations logic controller link block data storage area;
Data in module data memory block are carried out data communication with the relief area in PLC by data image link block data storage area.
2. the plc communication module based on IEC60870-5-104 Telecontrol Protocol according to claim 1, it is characterised in that: described module data memory block includes storage input area and storage output area;
Described data image includes input data image and output data image;
Described relief area includes input block and output buffer.
3. the plc communication module based on IEC60870-5-104 Telecontrol Protocol according to claim 2, it is characterised in that:
Described storage input area, by inputting the input block of data image and PLC, carries out correspondence according to address side-play amount;
The input block of PLC is also connected with status information memory block and the input data storage area of PLC, carries out status information and the storage of input data respectively;
Described storage output area, by exporting the output buffer of data image and PLC, carries out correspondence according to address side-play amount;
The output buffer of PLC is also connected with the output data storage area of PLC, reads output data.
4. the plc communication module based on IEC60870-5-104 Telecontrol Protocol according to claim 3, it is characterized in that: described corresponding process is, by configuration tool and PLC configuration software, data type and the period configuration of demand are generated JSON file, described module reads this JSON file, configuration systematic parameter, and it is corresponding with plc data address to complete module.
5. the plc communication module based on IEC60870-5-104 Telecontrol Protocol according to claim 1, it is characterised in that: described module includes embedded controller AT91M40800 and the 10/100M self adaptation ethernet controller LAN9218i-MT of ARM7 kernel.
6. the plc communication module based on IEC60870-5-104 Telecontrol Protocol according to claim 1, it is characterized in that: module passes through 104 stipulations main logic threads, realize IEC60870-5-104 Telecontrol Protocol, meet reliability communication, transmission control, connect the requirement that effectiveness is monitored.
7. the plc communication module based on IEC60870-5-104 Telecontrol Protocol according to claim 1, it is characterised in that: described module adopts embedded real-time multi-task operating system to carry out multi-task scheduling.
CN201610214484.9A 2016-04-07 2016-04-07 PLC (programmable logic controller) communication module based on IEC (international electrotechnical commission) 60870-5-104 telecontrol protocol Pending CN105652785A (en)

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CN106651648A (en) * 2016-12-06 2017-05-10 国网上海市电力公司 Data collection and protocol conversion method for shore power connecting technology of ship reaching port
CN107390625A (en) * 2017-08-25 2017-11-24 湖南三德科技股份有限公司 Plc data reading/writing method and system in a kind of coal sample detecting system
CN108920186A (en) * 2018-06-25 2018-11-30 杭州电子科技大学 A kind of movement instruction analysis method and device
CN111123826A (en) * 2019-12-26 2020-05-08 浙江机电职业技术学院 Data transmission method and device and electronic equipment
CN112549023A (en) * 2020-11-25 2021-03-26 浙江同善人工智能技术有限公司 Industrial robot demonstrator mode and protocol control method based on TCP socket interface
CN114253205A (en) * 2021-11-12 2022-03-29 浙江省北大信息技术高等研究院 PLC data reading method, device and system
CN115037568A (en) * 2022-05-16 2022-09-09 中国人民解放军海军工程大学 Industrial bus transmission method based on IO mapping

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106651648A (en) * 2016-12-06 2017-05-10 国网上海市电力公司 Data collection and protocol conversion method for shore power connecting technology of ship reaching port
CN107390625A (en) * 2017-08-25 2017-11-24 湖南三德科技股份有限公司 Plc data reading/writing method and system in a kind of coal sample detecting system
CN108920186A (en) * 2018-06-25 2018-11-30 杭州电子科技大学 A kind of movement instruction analysis method and device
CN111123826A (en) * 2019-12-26 2020-05-08 浙江机电职业技术学院 Data transmission method and device and electronic equipment
CN112549023A (en) * 2020-11-25 2021-03-26 浙江同善人工智能技术有限公司 Industrial robot demonstrator mode and protocol control method based on TCP socket interface
CN112549023B (en) * 2020-11-25 2022-05-27 浙江同善人工智能技术有限公司 Industrial robot demonstrator mode and protocol control method based on TCP socket interface
CN114253205A (en) * 2021-11-12 2022-03-29 浙江省北大信息技术高等研究院 PLC data reading method, device and system
CN115037568A (en) * 2022-05-16 2022-09-09 中国人民解放军海军工程大学 Industrial bus transmission method based on IO mapping
CN115037568B (en) * 2022-05-16 2024-05-07 中国人民解放军海军工程大学 Industrial bus transmission method based on IO mapping

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Application publication date: 20160608