CN103676763A - Method for achieving communication with Siemens S5 PLC based on UNIX platform and LINUX platform - Google Patents
Method for achieving communication with Siemens S5 PLC based on UNIX platform and LINUX platform Download PDFInfo
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- CN103676763A CN103676763A CN201310664058.1A CN201310664058A CN103676763A CN 103676763 A CN103676763 A CN 103676763A CN 201310664058 A CN201310664058 A CN 201310664058A CN 103676763 A CN103676763 A CN 103676763A
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Abstract
The invention discloses a method for achieving communication with a Siemens S5 PLC based on a UNIX platform and a LINUX platform. The method includes the steps of initialization, initialization on original sockets, generation on sockets, connection building, data requesting and disconnection of the connecting process. According to the method, original upper computer platform software can be replaced, no extra requirement for hardware systems is required, the UNIX/LINUX is an open source operation system, cost is low, the hardware and software cost is reduced, and meanwhile the safety and the reliability of systems are further improved.
Description
Technical field
The present invention relates to a kind of and implementation method Siemens S5PLC communication, belong to communication technical field.
Background technology
Siemens's SIMATIC S5 series of PLC is the Programmable Logic Controller that Siemens the eighties is released, and adopts the modular design of compact conformation, dependable performance.The S5PLC of take is control system that core forms extensive application in the industrial circle such as power plant, iron and steel, chemical industry at home.
SIMATIC S5PLC generally forms distributed automatic system by SINEC H1 net, and SINEC H1 net is comprised of equipment such as CP1430 communication module, CP1413 network interface card, transceiver (Transceiver), coaxial bus cable, terminal organ and PLC and workstations.CP1430 communication module is the interface module that S5PLC and miscellaneous equipment carry out communication.SINEC H1 net adopts ISO/OSI reference model, meets IEEE802.3 standard, adopts 7 layers of structure: Physical layer, link layer, network layer, transport layer, session layer, presentation layer, application layer.1-4 layer carries out configuration by physical connection with in CP1430 to be realized, and 5-7 layer is realized by relevant application software.
In the computer supervisory control system of domestic use S5PLC, the overwhelming majority has adopted the PROKON-LSX of Siemens Company or FactoryLink master system software to complete the communication function with S5PLC.And PROKON-LSX and FactoryLink software have all stopped production, and no longer provide corresponding support, and S5PLC is due to its stability as industrial control product and continuity, still in a large amount of uses.Therefore, need to provide reliable, stable host computer monitoring software to complete the functions such as exchanges data, monitoring of tools, senior application.
The deficiency of the computer supervisory control system of current use S5PLC has: (1), PROKON-LSX and FactoryLink software all stop production, and corresponding support is no longer provided.Former host computer computer hardware problem of aging is serious, cannot replace, and has had a strong impact on the safe operation of supervisory system; (2), do not have before this upper computer software based on UNIX/LINUX platform of mature and reliable can complete communication function.
Adopted after the new upper machine communication software based on UNIX/LINUX platform, master system can have been updated comprehensively, removed a hidden danger, can realize many Premium Features such as equipment dynamic monitoring, control authority locking, data statistic analysis simultaneously.
UNIX operating system, is a powerful multi-user, multiple task operating system, supports various processor framework, belongs to time sharing operating system, early than the exploitation of the Bell Laboratory at AT & T in 1969.(SuSE) Linux OS is a kind of cloning system of UNIX operating system, is the class Unix operating system of a set of free use and Free propagation, is the operating system of multi-user, multitask, support multithreading and the many CPU based on POSIX and UNIX.It can move main unix tool software, application program and procotol.It supports 32 and 64 hardware.Linux has inherited Unix take the design philosophy that network is core, is the multiple-user network operating system of a stable performance.The present invention is based on Redhat linux system and carry out program development, and be transplanted in other UNIX/LINUX operating system.
Summary of the invention
Technical matters to be solved by this invention is: utilize host computer on UNIX/LINUX platform to realize the communication with S5PLC, possess 802.3 agreement communication functions.
For solving the problems of the technologies described above, the invention provides and a kind ofly based on UNIX and LINUX platform, complete the implementation method with Siemens S5PLC communication, it is characterized in that, comprise the following steps:
1) in UNIX/LINUX system, by address family, be that AF_INET, type are that SOCK_STREAM creates socket socket;
2) with UNIX/LINUX devices in system, drive I/O channel management function ioctl to obtain the corresponding MAC Address of upper machine communication network interface card, account for altogether 6 bytes, described MAC Address is as source address (Source MAC Address), and MAC Address corresponding to the CP1430 communication module of S5PLC is as destination address (Destination MAC Address).
3) again by parameter initializations such as the sll_family in socket, sll_protocol, sll_ifindex, sll_hatype, sll_pkttype, sll_halen, source address, destination addresses, and operation parameter is carried out SOCKET connection, connection procedure is used SOCK_RAW parameter to complete, to receive all bottom-up informations that comprise IEEE802.3 agreement, after SOCKET is successfully established, will return to the SOCKET descriptor of generation, subsequent step completes on described SOCKET descriptor basis;
4) connect: send request frame (Connect Request, function code 0xe1), PLC replys and confirms claim frame (Connect Confirm, then send acknowledgement frame (Acknowledge, function code 0x60) function code 0xd1),, after this three process, communication is set up and is activated;
5) request msg: read plc data, send out Frame (Data, function code 0xf0), PLC first replys acknowledgement frame (Acknowledge, function code 0x60) to Frame and represents that it has received Frame, send out again an envelope Frame (Data, function code 0xf0) reply the data in PLC, receive after the Frame of PLC reply, send out again an envelope acknowledgement frame (Acknowledge, function code 0x60) replied confirmation, now the request process of a secondary data completes;
6) disconnect: send out claim frame (Disconnect Request, function code 0x80), PLC replys and confirms claim frame (Disconnect Confirm, function code 0xc0), send out acknowledgement frame (Acknowledge, function code 0x60), communication connects i.e. disconnection again.
The beneficial effect that the present invention reaches: the invention solves Siemens SIMATIC S5PLC and UNIX/LINUX master system and complete the problem of communication by IEEE802.3 agreement, eliminated S5PLC former can only with the defect of windows platform master system communication, reduce hardware and software investment, improved the safety and reliability of PLC and master system communication.
Embodiment
Due to the non-Transmission Control Protocol of IEEE802.3 agreement, and early stage a kind of underlying protocol based on MAC Address, use MAC Address to replace IP address.Therefore the present invention completes connection by RAW Ethernet communication modes.
First by address family, be that AF_INET, type are that SOCK_STREAM creates socket socket.
The IO channel management function that re-uses ioctl obtains the corresponding MAC Address of upper machine communication network interface card, account for altogether 6 bytes, this MAC Address is as source address (Source MAC Address), and MAC Address corresponding to the CP1430 communication module of S5PLC is as destination address (Destination MAC Address).The Ethernet data frame format of IEEE802.3 is generally as shown in table 1:
Table 1:
Thereafter, again by parameter initializations such as the sll_family in socket, sll_protocol, sll_ifindex, sll_hatype, sll_pkttype, sll_halen, source address, destination addresses, and use these parameters to carry out SOCKET connection, this connection must be used SOCK_RAW parameter to complete, to can receive all bottom-up informations that comprise 802.3 agreements.After SOCKET is successfully established, will return to the SOCKET of generation, follow-up all operations just completes on this SOCKET basis.
Connect: software first of the present invention is sent out claim frame (Connect Request, function code 0xe1), PLC can reply and confirm claim frame (Connect Confirm, function code 0xd1), thereafter software is sent out acknowledgement frame (Acknowledge again, function code 0x60), after this three process, communication is set up and is activated.
Request msg: after this, software reads plc data, will send out Frame (Data, function code 0xf0), PLC first can reply acknowledgement frame (Acknowledge to this Frame, function code 0x60) represent that it has received Frame, and then send out again an envelope Frame (Data, function code 0xf0) and reply the data in PLC.Software is received after the Frame of PLC reply, be sent out an envelope acknowledgement frame (Acknowledge, function code 0x60) again and be replied confirmation.Now, the request process of a secondary data completes.
Disconnect: software first of the present invention is sent out claim frame (Disconnect Request, function code 0x80), PLC can reply and confirm claim frame (Disconnect Confirm, function code 0xc0), thereafter software is sent out acknowledgement frame (Acknowledge again, function code 0x60), communication connects i.e. disconnection.
Above the process of the present invention and PLC communication is set forth, the SINEC H1 stipulations that wherein Frame (Data) has comprised S5PLC communication, its form that reads plc data frame is as shown in table 2:
Table 2:
Can correctly intactly receive all valid data like this.Data writing format similarly.
The present invention be based under UNIX/LINUX platform, develop with Siemens S5PLC bitcom; Meanwhile, software of the present invention by initialization, initialization raw socket, generate socket, connect, request msg, a series of complete process implementations such as disconnect, please all processes all have autonomous program source code support.The present invention can substitute original host computer platform software completely, and to hardware system without extra demand, and UNIX/LINUX is open source operating system, with low cost, reduced hardware and software cost, further improved the safety and reliability of system simultaneously.By arriving UNIX/LINUX platform based on existing can completing with the software transplanting of Siemens S5PLC communication in Windows system, can complete the object of the invention equally.
IEEE: IEEE's (English: Institute of Electrical and Electronics Engineers, referred to as IEEE) be international electronic technology and an Electronic Engineering Association that builds on January 1st, 1963, also be one of maximum in the world professional technique tissue, have from 175 360,000 national members.Except being built in the general headquarters of New York city,U.S, also in more than 150 country in the whole world, having branch, and also have 35Ge professional society and 2 federations.It often can deliver multiple magazine, journal, books every year, also holds the specialized conference of at least 300 times.IEEE has great impact in the defined standard of industry member at present.
PLC: programmable logic controller (PLC) (Programmable Logic Controller, be called for short PLC), a digital electronic device with microprocessor, the digital logic controller of controlling for robotization, can load steering order at any time in internal memory and store and carry out.Programmable Logic Controller is by innernal CPU, and the unit institute modularities such as instruction and data internal memory, input-output unit, power supply module, digital simulation are combined into.PLC is widely used in current industrial control field.Before programmable logic controller (PLC) occurs, generally to use hundreds of relay and counter could form the automated system with identical function, and now, through the simple programmable logic controller module of programming, substantially replaced these large-scale plants.The system program of programmable logic controller (PLC) generally before dispatching from the factory initialization complete, what user can be according to oneself need to meet different automated production requirements from the corresponding user program of edlin.PLC can receive (input) and send the electric or electronic signal of (output) multiple kenel, and with them, controls or supervise machinery and the electrical system of almost all kinds.
Below with preferred embodiment, disclose the present invention, so it is not intended to limiting the invention, and all employings are equal to replaces or technical scheme that equivalent transformation mode obtains, within all dropping on protection scope of the present invention.
Claims (1)
1. based on UNIX and LINUX platform, complete the implementation method with Siemens S5PLC communication, it is characterized in that, comprise the following steps:
1), in UNIX/LINUX system, by address family, be that AF_INET, type are that SOCK_STREAM creates socket socket;
2) with UNIX/LINUX devices in system, drive I/O channel management function ioctl to obtain the corresponding MAC Address of upper machine communication network interface card, account for altogether 6 bytes, described MAC Address is as source address (Source MAC Address), and MAC Address corresponding to the CP1430 communication module of S5PLC is as destination address (Destination MAC Address).
3) again by parameter initializations such as the sll_family in socket, sll_protocol, sll_ifindex, sll_hatype, sll_pkttype, sll_halen, source address, destination addresses, and operation parameter is carried out SOCKET connection, connection procedure is used SOCK_RAW parameter to complete, to receive all bottom-up informations that comprise IEEE802.3 agreement, after SOCKET is successfully established, will return to the SOCKET descriptor of generation, subsequent step completes on described SOCKET descriptor basis;
4) connect: send request frame Connect Request, function code 0xe1, PLC replys and confirms claim frame Connect Confirm, function code 0xd1, then send acknowledgement frame Acknowledge, and function code 0x60, after this three process, communication is set up and is activated;
5) request msg: read plc data, send out Frame Data, function code 0xf0, PLC first replys acknowledgement frame Acknowledge to Frame, and function code 0x60, represents that PLC has received Frame, send out again an envelope Frame Data, function code 0xf0, replys the data in PLC, receives after the Frame of PLC reply, to send out again an envelope acknowledgement frame Acknowledge, function code 0x60, is replied confirmation, and now the request process of a secondary data completes;
6) disconnect: send out claim frame Disconnect Request, function code 0x80, PLC replys and confirms claim frame Disconnect Confirm, function code 0xc0, then send out acknowledgement frame Acknowledge, and function code 0x60, communication connects i.e. disconnection.
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