CN105282226A - Control system communication method based on Ethernet - Google Patents
Control system communication method based on Ethernet Download PDFInfo
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- CN105282226A CN105282226A CN201510552374.9A CN201510552374A CN105282226A CN 105282226 A CN105282226 A CN 105282226A CN 201510552374 A CN201510552374 A CN 201510552374A CN 105282226 A CN105282226 A CN 105282226A
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- communication
- communication processor
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- 230000006854 communication Effects 0.000 title claims abstract description 194
- 238000004891 communication Methods 0.000 title claims abstract description 191
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000013523 data management Methods 0.000 claims description 3
- 108010066082 tartrate-sensitive acid phosphatase Proteins 0.000 claims 1
- 239000013256 coordination polymer Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/2878—Access multiplexer, e.g. DSLAM
- H04L12/2879—Access multiplexer, e.g. DSLAM characterised by the network type on the uplink side, i.e. towards the service provider network
- H04L12/2881—IP/Ethernet DSLAM
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
- G05B19/41855—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication by local area network [LAN], network structure
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a control system communication method based on an Ethernet. The control system communication method is characterized in that mutual communication of a first system and a second system is performed through communication processors, the first system provides a first communication processor, and an Ethernet communication processor serves as the first communication processor; the second system is provided with a CPU and a second communication processor, and the second communication processor uses a dual-port RAM for being directly connected to the second system; and four page frames serve as connection interfaces between the second communication processor and application programs of the CPU, and each used interface must be initialized in a start program and a restart program. According to the invention, mutual communication among different systems is realized through the Ethernet.
Description
[technical field]
The present invention relates to the technical field of communication means, particularly based on the technical field of the control system communication means of Ethernet.
[background technology]
Current influential standard for Fieldbus is in the world a lot, is singly the international standard for Fieldbus organized to set up of IEC in 2000 with regard to 8,9 kind more than.Numerous standard for Fieldbus, makes troubles to the integrated of control system, makes the Fieldbus Products of each manufacturers produce be difficult to integrate, and realizes can operating mutually.When bus standard is difficult to unified at the scene, Ethernet obtains in industrial automation and process control field and increases rapidly, now many manufacturers are all for its PLC produced and remote I/O thereof provide the interface and function that are connected with Ethernet, provide and are connected with its control system based on PC with Ethernet.
[summary of the invention]
Object of the present invention solves the problems of the prior art exactly, proposes a kind of control system communication means based on Ethernet, the mutual communication that can realize between different system by Ethernet.
For achieving the above object, the present invention proposes a kind of control system communication means based on Ethernet, comprise the following steps successively:
A) system constructing: the first system adopts communication processor to realize with the intercommunication mutually with second system, and the first system provides the first communication processor, the first described Communication processor adopts ethernet communication processor, second system is provided with CPU and second communication processor, second communication processor adopts two-port RAM to be directly connected to second system, two-port RAM is divided into 4 equal sections being called page frame, the interface that this 4 page frames are connected with the application program of CPU as second communication processor, the interface of each use in startup and must restart initialization in program, in described second system, job request is defined by interface number and job number, and sent to second communication processor through data management function, in second communication processor, the exchange of data is realized by communication function block,
B) H1-ethernet communication: during second system communication, second communication processor has prepared a data buffer zone, and use background communications function " all to send " transfer of data to data buffer zone, then second communication processor creates a H1 frame, and transmits this frame to remote station; A confirmation message be beamed back to second communication processor after remote station receives this H1 frame; The triggering of the data communication of ethernet communication processor in the first system is realized by user program, and the first system provides user interface to realize transmission and the reception of data; The communication connection of second system is completed by the Internet;
C) tcp/ip communication: in the first system and second system, the connection of its tcp/ip communication employs two parameters: IP address and port, it uses and method of attachment adopts mode second system application corresponding to the local port intersection of local station and distant station to require the size of definition transfer of data, do not allow to use default value, and can designated communication job priority, in the global buffer of buffering area tcp/ip communication protocol stack that receives and transmit in communication;
D) realization of ethernet communication: the first system comprises two parts with communicating of second system: the connection configuration of communication processor; Plc communication is programmed; First communication processor configuration of the first system and plc communication programming all use software STEP7, and second communication processor connects configuration and uses Win-NCS configuration software, and PLC programming uses software S5;
D1) in the first system, the realization of ethernet communication data-interface function uses SEND, RECEIVE interface function; In software STEP7 user program, the CPU in the first system and exchanges data using function FC5 and FC6 between the first communication processor has come, and use FC50 and FC60 that the every frame of data for transmission is greater than 240 bytes has come;
D2) ethernet communication of second system realizes, first the ethernet communication should setting up second communication processor connects, the communication link of second communication processor is connected to H1-ethernet communication and is connected two kinds with TCP/IP, and the realization of communication starts by corresponding communication operations and completes; When each respective communication setting up second communication processor connects, think that each connection is as the job number of specifying; Operationally, the communication specifying job number uses the communication operations of specifying to complete the transfer of data of specifying to second system; During system cloud gray model, second communication processor establishes a communications link according to MAC Address, TSAP and configuration, and after communication connection is set up, just log-on data exchanges.
Above-mentioned based in the control system communication means of Ethernet, described second communication processor once can manage nearly 64 job request, comprises second communication processor 32 tie points.
Above-mentioned based in the control system communication means of Ethernet, in described b) step, the task one of second communication processor receives data from the Internet, and be transferred to the user data area of CPU; Two is receive data from the user data area of CPU, and is sent on the Internet.
Above-mentioned based in the control system communication means of Ethernet, described steps d 2) in be provided with the communication application program that can process connection request in second system, communication process block is employed in communication application program, second communication processor is before coming into operation, must initialization, initialized content comprises the local relevant with each connection and Global Information and general parameters.
Beneficial effect of the present invention: utilize Ethernet to realize the intercommunication mutually between two different systems, communication means is more, both Industrial Ethernet H1 can have been used to connect, TCP also can be used to connect, the application scenario that, data volume lower to communications security is large can use UDP to connect.The volume of transmitted data that each H1 or TCP connects can from 16 bytes to 8192 bytes not etc., and maximum 2048 bytes that can reach of UDP, therefore quite flexible, the needs of various control system can be met.The workload of simultaneously programming is also little, and a large amount of communication practical functions has been integrated in functional block and CP all, and user only need complete simple configuration can realize mutual communicating with the simple signal procedure of establishment.
[embodiment]
The present invention is based in the control system communication means of Ethernet, comprise the following steps successively:
A) system constructing: the first system adopts communication processor to realize with the intercommunication mutually with second system, and the first system provides the first communication processor, the first described Communication processor adopts ethernet communication processor, second system is provided with CPU and second communication processor, second communication processor adopts two-port RAM to be directly connected to second system, two-port RAM is divided into 4 equal sections being called page frame, the interface that this 4 page frames are connected with the application program of CPU as second communication processor, the interface of each use in startup and must restart initialization in program, in described second system, job request is defined by interface number and job number, and sent to second communication processor through data management function, in second communication processor, the exchange of data is realized by communication function block,
B) H1-ethernet communication: during second system communication, second communication processor has prepared a data buffer zone, and use background communications function " all to send " transfer of data to data buffer zone, then second communication processor creates a H1 frame, and transmits this frame to remote station; A confirmation message be beamed back to second communication processor after remote station receives this H1 frame; The triggering of the data communication of ethernet communication processor in the first system is realized by user program, and the first system provides user interface to realize transmission and the reception of data; The communication connection of second system is completed by the Internet;
H1-Industrial Ethernet is a kind of agreement based on ethernet standard IEEE802.3, exchanges for the high speed between Programmable Logic Controller, mass data.Exchanges data between its station adopts " H1-frame ", and transmission connects for logic connects, and uses transport service access point (TSAP) to carry out transmission service between different stations.Transmission connects based on addressing information, and addressing information provides the definite path explanation of between two service access points one.Transmission connection employs following two parameters: MAC Address and TSAP (transport service access point).MAC Address, i.e. ethernet node address, define the access application at a station.TSAP identifies the access path of transmission service.
C) tcp/ip communication: in the first system and second system, the connection of its tcp/ip communication employs two parameters: IP address and port, it uses and method of attachment adopts mode second system application corresponding to the local port intersection of local station and distant station to require the size of definition transfer of data, do not allow to use default value, and can designated communication job priority, in the global buffer of buffering area tcp/ip communication protocol stack that receives and transmit in communication;
D) realization of ethernet communication: the first system comprises two parts with communicating of second system: the connection configuration of communication processor; Plc communication is programmed; First communication processor configuration of the first system and plc communication programming all use software STEP7, and second communication processor connects configuration and uses Win-NCS configuration software, and PLC programming uses software S5;
D1) in the first system, the realization of ethernet communication data-interface function uses SEND, RECEIVE interface function; In software STEP7 user program, CPU in the first system and the exchanges data using function FC5 (AG-SENG) between the first communication processor and FC6 (AG-RECE) has come, and the every frame of data for transmission is greater than the use FC50 (AG-LSEND) of 240 bytes and FC60 (AG-LRECE) have been come;
D2) ethernet communication of second system realizes, first the ethernet communication should setting up second communication processor connects, the communication link of second communication processor is connected to H1-ethernet communication and is connected two kinds with TCP/IP, and the realization of communication starts by corresponding communication operations and completes; When each respective communication setting up second communication processor connects, think that each connection is as the job number of specifying; Operationally, the communication specifying job number uses the communication operations of specifying to complete the transfer of data of specifying to second system; During system cloud gray model, second communication processor establishes a communications link according to MAC Address, TSAP and configuration, and after communication connection is set up, just log-on data exchanges.
When second system or when restarting, CPU and second is that the reason device that communicates performs respective boot, and CPU detects the module of installing and also starts application program, then calls initialize routine initialization CP.Devise an initialization audit program in program, if there is initialization mistake, put corresponding initialization error code, and stop the operation of second system, indication mechanism starts unsuccessfully.Second system starts needs about 15s, and after about 15s, second is that communication reason device waits for that the initialization request come from CPU is until initialization completes.The boot time of CPU approximately needs 18s at (comprising the boot time of CP), defines the start-up study timer of a 20s at this.In order to ensure correct guiding and the initialization of second system, and CPU by stop be switched to operational mode or by run be switched to stopping after re-execute cold/warm start time, prevent communication failure, must re invocation second be communicate with managing the initialize routine of device in transmitting tissue's block, cold start-up and warm start tissue block, re-establish connection.
Above-mentioned based in the control system communication means of Ethernet, described second communication processor once can manage nearly 64 job request, comprise second communication processor 32 tie points, in described b) step, the task one of second communication processor receives data from the Internet, and be transferred to the user data area of CPU; Two is receive data from the user data area of CPU, and be sent on the Internet, described steps d 2) in be provided with the communication application program that can process connection request in second system, communication process block is employed in communication application program, second communication processor is before coming into operation, must initialization, initialized content comprises the local relevant with each connection and Global Information and general parameters.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.
Claims (4)
1., based on a control system communication means for Ethernet, comprise the following steps successively:
A) system constructing: the first system adopts communication processor to realize with the intercommunication mutually with second system, and the first system provides the first communication processor, the first described Communication processor adopts ethernet communication processor, second system is provided with CPU and second communication processor, second communication processor adopts two-port RAM to be directly connected to second system, two-port RAM is divided into 4 equal sections being called page frame, the interface that this 4 page frames are connected with the application program of CPU as second communication processor, the interface of each use in startup and must restart initialization in program, in described second system, job request is defined by interface number and job number, and sent to second communication processor through data management function, in second communication processor, the exchange of data is realized by communication function block,
B) H1-ethernet communication: during second system communication, second communication processor has prepared a data buffer zone, and use background communications function " all to send " transfer of data to data buffer zone, then second communication processor creates a H1 frame, and transmits this frame to remote station; A confirmation message be beamed back to second communication processor after remote station receives this H1 frame; The triggering of the data communication of ethernet communication processor in the first system is realized by user program, and the first system provides user interface to realize transmission and the reception of data; The communication connection of second system is completed by the Internet;
C) tcp/ip communication: in the first system and second system, the connection of its tcp/ip communication employs two parameters: IP address and port, it uses and method of attachment adopts mode second system application corresponding to the local port intersection of local station and distant station to require the size of definition transfer of data, do not allow to use default value, and can designated communication job priority, in the global buffer of buffering area tcp/ip communication protocol stack that receives and transmit in communication;
D) realization of ethernet communication: the first system comprises two parts with communicating of second system: the connection configuration of communication processor; Plc communication is programmed; First communication processor configuration of the first system and plc communication programming all use software STEP7, and second communication processor connects configuration and uses Win-NCS configuration software, and PLC programming uses software S5;
D1) in the first system, the realization of ethernet communication data-interface function uses SEND, RECEIVE interface function; In software STEP7 user program, the CPU in the first system and exchanges data using function FC5 and FC6 between the first communication processor has come, and use FC50 and FC60 that the every frame of data for transmission is greater than 240 bytes has come;
D2) ethernet communication of second system realizes, first the ethernet communication should setting up second communication processor connects, the communication link of second communication processor is connected to H1-ethernet communication and is connected two kinds with TCP/IP, and the realization of communication starts by corresponding communication operations and completes; When each respective communication setting up second communication processor connects, think that each connection is as the job number of specifying; Operationally, the communication specifying job number uses the communication operations of specifying to complete the transfer of data of specifying to second system; During system cloud gray model, second communication processor establishes a communications link according to MAC Address, TSAP and configuration, and after communication connection is set up, just log-on data exchanges.
2. as claimed in claim 1 based on the control system communication means of Ethernet, it is characterized in that: described second communication processor once can manage nearly 64 job request, comprises second communication processor 32 tie points.
3. as claimed in claim 1 based on the control system communication means of Ethernet, it is characterized in that: in described b) step, the task one of second communication processor receives data from the Internet, and be transferred to the user data area of CPU; Two is receive data from the user data area of CPU, and is sent on the Internet.
4. as claimed in claim 1 based on the control system communication means of Ethernet, it is characterized in that: described steps d 2) in be provided with the communication application program that can process connection request in second system, communication process block is employed in communication application program, second communication processor is before coming into operation, must initialization, initialized content comprises the local relevant with each connection and Global Information and general parameters.
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| CN201510552374.9A CN105282226A (en) | 2015-09-01 | 2015-09-01 | Control system communication method based on Ethernet |
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| CN201510552374.9A CN105282226A (en) | 2015-09-01 | 2015-09-01 | Control system communication method based on Ethernet |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6004345A (en) * | 1998-06-10 | 1999-12-21 | Sudsina; Loretta A. | Therapeutic wrap for sore throats |
| CN104737138A (en) * | 2012-10-08 | 2015-06-24 | 国际商业机器公司 | Adjunct component to provide full virtualization using paravirtualized hypervisors |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6004345A (en) * | 1998-06-10 | 1999-12-21 | Sudsina; Loretta A. | Therapeutic wrap for sore throats |
| CN104737138A (en) * | 2012-10-08 | 2015-06-24 | 国际商业机器公司 | Adjunct component to provide full virtualization using paravirtualized hypervisors |
Non-Patent Citations (1)
| Title |
|---|
| 方彦军, 廖廷常: ""基于以太网的控制系统通信技术研究"", 《工业仪表与自动化装置》 * |
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Application publication date: 20160127 |