CN201307867Y - Communication system applicable to multiple communication protocols - Google Patents
Communication system applicable to multiple communication protocols Download PDFInfo
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- CN201307867Y CN201307867Y CNU2008201552979U CN200820155297U CN201307867Y CN 201307867 Y CN201307867 Y CN 201307867Y CN U2008201552979 U CNU2008201552979 U CN U2008201552979U CN 200820155297 U CN200820155297 U CN 200820155297U CN 201307867 Y CN201307867 Y CN 201307867Y
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Abstract
A communication system applicable to multiple communication protocols relates to a communication system of communication protocols. The communication system comprises a computer for monitoring meters and a PLC/DC control system. The computer for monitoring meters comprises an information comparing module and a communication protocol selecting module, wherein, the information comparing module is in communication connection with the communication protocol selecting module; and the communication protocol selecting module is respectively in signal connection with a module for sending handshaking signals and in connection with a module for sending communication content. The PLC/DC control system comprises an information receiving module and an information pass-back module, wherein, the information receiving module is in signal connection with the information pass-back module; the information pass-back module is in communication connection with the information comparing module of the computer for monitoring meters; and both the module for sending handshaking signals and the module for sending information content of the computer for monitoring meters are connected with the information receiving module of the PLC/DC control system. The utility model provides an effective technical means for improving the commonality and the expandability of the products in meter manufacturers.
Description
Technical field
The utility model relates to the communication protocol communication system, particularly a kind of communication system that is applicable to various communications protocols that the conversion software of nonstandard communication protocol is housed.
Background technology
Present a lot of of home make instrument, communication modes adopts the nonstandard communication protocol of producer oneself, though can constitute little independent supervisory control system, but be difficult to include in large-scale control system such as level of factory, workshop level, so not only cause the overlapping investment of The whole control system, also exist contradictions such as instrumented data and control system data are inconsistent, data management difficulty simultaneously.
Chinese patent CN101005491 discloses a kind of method that can carry out communication between two kinds of communications protocol, this method is provided with on a conversion equipment and can sets up an online communication module with a network, an and storage module, be provided with a switching software in this storage module, when this conversion equipment and this network set up online after, if receive the client under the sealing agreement communication network, see through the network signal that this network transmitted, promptly this network signal is changed, and be sent to another client under the open protocol communication network, and if receive another affiliated client of this open protocol communication network, see through another network signal that this network transmitted, promptly this another network signal is changed, and be sent to another client under this sealing agreement communication network, can carry out communication between these clients, break through the different restriction of communications protocol.
Above utility model specifically is applied to communications protocol process conversion realization communication in the network, needs the technology of software and hardware combining, and certain limitation is arranged, and system is inapplicable to instrument monitoring.
The utility model content
Technical problem to be solved in the utility model is non-standard Modbus communications protocol instrument and conventional PLC/DCS control system are combined together, and also versatility and the extensibility for instrument manufacturing firm raising product provides effective technical means.
In order to address the above problem the technical solution of the utility model is such:
Be applicable to the communication system of various communications protocols, comprise instrument monitoring, PLC/DC control system, it is characterized in that:
Instrument monitoring comprises, the information comparison module, and the information comparison module selects module communication to be connected with communication protocol; Communication protocol is selected module, is connected with transmission handshake module by signal respectively, is connected with transmission Content of Communication module;
The PLC/DC control system comprises, receives information module, receives information module and is connected with information passback module by signal;
The information of PLC/DC control system passback module communicates to connect with the information comparison module of instrument monitoring; The transmission handshake module of instrument monitoring is connected the reception information module of PLC/DC control system respectively with transmission Content of Communication module.
Communication process comprises the steps:
(1) instrument monitoring at first selects module to select a kind of communication protocol at random from the various communications protocols of storage in advance by communication protocol before sending Content of Communication, communicates by sending the handshake module.
(2) at first send handshake to the PLC/DC control system by sending the handshake module, the reception information module of PLC/DC control system returns the information comparison module that module sends back handshake instrument monitoring again by information after receiving handshake.
(3) the information comparison module of instrument monitoring is received after the PLC/DCS control system transmits the handshake of returning and is carried out information relatively, whether the handshake of judging passback is identical with the handshake that sends in advance, when identical, confirm that communication protocol is correct with the handshake of prior transmission; If the handshake of judging and sending in advance is inequality, then select module to change a kind of communication protocol, once more operating procedure (2) by communication protocol; Send the reception information module of Content of Communication to the PLC/DCS control system, the PLC/DCS control system receives that this Content of Communication also returns it to instrument monitoring later on.
(4) instrument monitoring transmits the Content of Communication of returning by the information comparison module with former Content of Communication and PLC/DCS control system and carries out information relatively, if both differences, then in the explanation communication error code has taken place, instrument monitoring resends this Content of Communication; If both are identical, illustrate that then the Content of Communication that the PLC/DCS control system is received is correct.
(5) instrument monitoring sends next handshake, and the PLC/DCS control system deposits the preceding data of once receiving in specified memory after receiving this handshake.This course of work repeats to last till that all data transmit finishes always.
By the hand shaking of instrument monitoring and PLC/DCS control system and the conversion that relatively realizes nonstandard communication protocol between the data.
By the nonstandard communication protocol conversion system, omitted PLC/DCS control system corresponding simulating amount input module, the man-machine interface with the monitored meter computing and control system unites two into one simultaneously.Promptly save investment goods, simplified operating procedure again.
The utility model has solved the technical problem that non-standard Modbus communications protocol instrument and conventional PLC/DCS control system are combined together, and also versatility and the extensibility that improves product for instrument manufacturing firm provides effective technical means.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 represents the flow chart of nonstandard communication protocol conversion system of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, be applicable to the communication system of various communications protocols, comprise instrument monitoring 10, PLC/DC control system 20.Instrument monitoring 10 comprises, information comparison module 5, and information comparison module 5 selects module 1 to communicate to connect with communication protocol; Communication protocol is selected module 1, is connected with transmission handshake module 2 signals respectively, is connected with transmission Content of Communication module 6.PLC/DC control system 20 comprises, receives information module 3, receives information module 3 and is connected with information passback module 4 signals.
The information of PLC/DC control system 20 passback module 4 communicates to connect with the information comparison module 5 of instrument monitoring 10; The transmission handshake module 2 of instrument monitoring 10 is connected the reception information module 3 of PLC/DC control system 20 respectively with transmission Content of Communication module 6.
Communication process comprises the steps:
(1) instrument monitoring 10 at first selects module 1 to select a kind of communication protocol at random from the various communications protocols of storage in advance by communication protocol before sending Content of Communication, communicates by sending handshake module 2.
(2) at first send handshake to PLC/DC control system 20 by sending handshake module 2, the reception information module 3 of PLC/DC control system 20 returns the information comparison module 5 that module 4 sends back handshake instrument monitoring 10 again by information after receiving handshake.
(3) the information comparison module 5 of instrument monitoring 10 is received after PLC/DCS control system 20 transmits the handshake of returning and is carried out information relatively, whether the handshake of judging passback is identical with the handshake that sends in advance, when identical, confirm that communication protocol is correct with the handshake of prior transmission; If the handshake of judging and sending in advance is inequality, then select module 1 to change a kind of communication protocol, operating procedure (2) once more by communication protocol; Send the reception information module 3 of Content of Communication to PLC/DCS control system 20, PLC/DCS control system 20 receives that this Content of Communication also returns it to instrument monitoring 10 later on.
(4) instrument monitoring 10 transmits the Content of Communication of returning by information comparison module 5 with former Content of Communication and PLC/DCS control system 20 and carries out information relatively, if both differences, then in the explanation communication error code has taken place, instrument monitoring 10 resends this Content of Communication; If both are identical, illustrate that then the Content of Communication that PLC/DCS control system 20 is received is correct.Utilize and send the reception information module 3 transmission Content of Communication of Content of Communication module 6 to PLC/DCS control system 20.
(5) instrument monitoring sends next handshake, and the PLC/DCS control system deposits the preceding data of once receiving in specified memory after receiving this handshake.This course of work repeats to last till that all data transmit finishes always.
By the hand shaking of instrument monitoring 10 and PLC/DCS control system 20 and the conversion that relatively realizes nonstandard communication protocol between the data.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; real field is novel under the prerequisite that does not break away from the utility model spirit and scope also can right various changes and modifications, and these variations and changing are said and all fallen in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. be applicable to the communication system of various communications protocols, comprise instrument monitoring, PLC/DC control system, it is characterized in that:
Instrument monitoring comprises, the information comparison module, and the information comparison module selects module communication to be connected with communication protocol; Communication protocol is selected module, is connected with transmission handshake module by signal respectively, is connected with transmission Content of Communication module;
The PLC/DC control system comprises, receives information module, receives information module and is connected with information passback module by signal;
The information of PLC/DC control system passback module communicates to connect with the information comparison module of instrument monitoring; The transmission handshake module of instrument monitoring is connected the reception information module of PLC/DC control system respectively with transmission Content of Communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201552979U CN201307867Y (en) | 2008-11-13 | 2008-11-13 | Communication system applicable to multiple communication protocols |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201552979U CN201307867Y (en) | 2008-11-13 | 2008-11-13 | Communication system applicable to multiple communication protocols |
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| Publication Number | Publication Date |
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| CN201307867Y true CN201307867Y (en) | 2009-09-09 |
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| CNU2008201552979U Expired - Fee Related CN201307867Y (en) | 2008-11-13 | 2008-11-13 | Communication system applicable to multiple communication protocols |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721532A (en) * | 2021-09-07 | 2021-11-30 | 深圳市合信自动化技术有限公司 | PLC CPU extension module multi-bus protocol self-adaption method |
| CN115047819A (en) * | 2022-05-17 | 2022-09-13 | 北京万昇智能科技有限公司 | PLC system, PLC data transmission method and device |
-
2008
- 2008-11-13 CN CNU2008201552979U patent/CN201307867Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721532A (en) * | 2021-09-07 | 2021-11-30 | 深圳市合信自动化技术有限公司 | PLC CPU extension module multi-bus protocol self-adaption method |
| CN115047819A (en) * | 2022-05-17 | 2022-09-13 | 北京万昇智能科技有限公司 | PLC system, PLC data transmission method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20171113 |