CN202995411U - A PLC control system - Google Patents
A PLC control system Download PDFInfo
- Publication number
- CN202995411U CN202995411U CN2012206496327U CN201220649632U CN202995411U CN 202995411 U CN202995411 U CN 202995411U CN 2012206496327 U CN2012206496327 U CN 2012206496327U CN 201220649632 U CN201220649632 U CN 201220649632U CN 202995411 U CN202995411 U CN 202995411U
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- Prior art keywords
- module
- plc
- output
- spot
- control system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model discloses a PLC control system comprising controlled members, local PLCs, and a main PLC device. Each controlled member is equipped with a local PLC used for controlling. The main PLC is connected with all local PLCs via coaxial cables. In the technical scheme of the utility model, the hardware design of a system is considered comprehensively and reasonably so that anti-interference capability and reliability of the system are increased integrally.
Description
Technical field
The utility model relates to the Electrical Control Technology field, is specifically related to a kind of PLC control system.
Background technology
Programmable logic controller (PLC) (Programmable Logic Controller, PLC), it adopts a class programmable memory, be used for its internally stored program, actuating logic computing, sequential control, regularly, the user oriented instructions such as counting and arithmetical operation, and by numeral or analog pattern input/output various types of machineries of control or production run.
The utility model content
The utility model has overcome the deficiencies in the prior art, and a kind of PLC control system is provided, and has advantages of good reliability.
Consider the problems referred to above of prior art, according to an aspect of the present utility model, for solving above-mentioned technical matters, the utility model by the following technical solutions:
A kind of PLC control system comprises control object, PLC and main PLC device on the spot; PLC on the spot, described each control object arranges a PLC on the spot; Main PLC device, described main PLC device by concentric cable respectively with all on the spot PLC be connected.
As the further optimization of this programme, described main PLC device comprises CPU module, coder module, analog output module and CAN communication module;
Interconnect between described CPU module, coder module, analog output module and CAN communication module;
Also comprise expansion module, described expansion module comprises master chip module, photoelectric coupled circuit, discharge circuit, output transistor and CAN transceiver; Described master chip module comprises master chip, is integrated with digital input module, digital output module, analog input module and CAN interface module on described master chip; The input end of described photoelectric coupled circuit is connected with the external digital load module, and the output terminal of described photoelectric coupled circuit is connected with described digital input module; The input end of described output transistor is connected with described digital output module, and the output terminal of described output transistor is connected with outside output circuit; External analog signal is connected with described analog input module by described discharge circuit; Described CAN interface module is connected with described CAN communication module by the CAN transceiver.
As the further optimization of this programme, described control object and on the spot the signal input part between PLC be provided with the R-C wave filter.
As the further optimization of this programme, the time constant filter of described R-C wave filter is 10-20ms.
Compared with prior art, one of the beneficial effects of the utility model are: in the technical scheme of the utility model PLC control system, comprehensively, reasonable consideration arrived the hardware design etc. of system, improved on the whole antijamming capability and the reliability of system.
Description of drawings
Fig. 1 shows the schematic block diagram according to the PLC control system of an embodiment of the utility model;
Fig. 2 shows the schematic block diagram according to the PLC control system of another embodiment of the utility model;
Fig. 3 shows the expansion module schematic block diagram according to the PLC control system of an embodiment of the utility model;
In figure, main PLC device 1, PLC2, control object 3, CPU module 4, coder module 5, analog output module 6, CAN communication module 7, expansion module 8, outside output circuit 9, output transistor 10, master chip module 11, digital input module 12, digital output module 13, analog input module 14, CAN interface module 15, photoelectric coupled circuit 16, external digital load module 17, discharge circuit 18, external analog signal 19, CAN transceiver 20, CAN communication module 21 on the spot.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
With reference to shown in Figure 1, an a kind of embodiment of PLC control system comprises control object 3, PLC2 and main PLC device 1 on the spot;
PLC2 on the spot, described each control object 3 arranges one and is used for the PLC2 on the spot that controls;
Described PLC2 on the spot is used for carrying out control task, and control information is passed to main PLC device 1;
Described main PLC device 1 receives each and does not directly act on control object 3 after the information of PLC2 on the spot, is used for the Comprehensive Control of management nature, namely to the Comprehensive Control of PLC2 on the spot.
As shown in Figure 2 and Figure 3, wherein said main PLC device 1 can comprise CPU module 4, coder module 5, analog output module 6 and CAN communication module 7, interconnects between described CPU module 4, coder module 5, analog output module 6 and CAN communication module 7; Also comprise expansion module 8, described expansion module 8 comprises master chip module 11, photoelectric coupled circuit 16, discharge circuit 18, output transistor 10 and CAN transceiver 20; Described master chip module 11 comprises master chip, is integrated with digital input module 12, digital output module 13, analog input module 14 and CAN interface module 15 on described master chip; The input end of described photoelectric coupled circuit 16 is connected with external digital load module 17, and the output terminal of described photoelectric coupled circuit 16 is connected with described digital input module 12; The input end of described output transistor 10 is connected with described digital output module 13, and the output terminal of described output transistor 10 is connected with outside output circuit 9; External analog signal 19 is connected with described analog input module 14 by described discharge circuit 18; Described CAN interface module 15 is connected with described CAN communication module 21 by CAN transceiver 20.
Input/output signal between described PLC2 on the spot and main PLC device 1 all adopts photoelectricity isolation, makes the isolation on electric between the external circuit of industry spot and controller internal circuit.
Described control object 3 and on the spot the signal input part between PLC2 be provided with the R-C wave filter, be used for preventing the interference of other signal.
The time constant filter of described R-C wave filter can be 10-20ms, and experiment draws, and filter effect is better in this time constant filter scope.
Claims (4)
1. PLC control system is characterized in that: comprise control object, PLC and main PLC device on the spot; PLC on the spot, described each control object arranges a PLC on the spot; Main PLC device, described main PLC device by concentric cable respectively with all on the spot PLC be connected.
2. PLC control system according to claim 1 is characterized in that:
Described main PLC device comprises CPU module, coder module, analog output module and CAN communication module;
Interconnect between described CPU module, coder module, analog output module and CAN communication module;
Also comprise expansion module, described expansion module comprises master chip module, photoelectric coupled circuit, discharge circuit, output transistor and CAN transceiver; Described master chip module comprises master chip, is integrated with digital input module, digital output module, analog input module and CAN interface module on described master chip; The input end of described photoelectric coupled circuit is connected with the external digital load module, and the output terminal of described photoelectric coupled circuit is connected with described digital input module; The input end of described output transistor is connected with described digital output module, and the output terminal of described output transistor is connected with outside output circuit; External analog signal is connected with described analog input module by described discharge circuit; Described CAN interface module is connected with described CAN communication module by the CAN transceiver.
3. PLC control system according to claim 1 and 2, is characterized in that, described control object and on the spot the signal input part between PLC be provided with the R-C wave filter.
4. PLC control system according to claim 3, is characterized in that, the time constant filter of described R-C wave filter is 10-20ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206496327U CN202995411U (en) | 2012-12-01 | 2012-12-01 | A PLC control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206496327U CN202995411U (en) | 2012-12-01 | 2012-12-01 | A PLC control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202995411U true CN202995411U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206496327U Expired - Fee Related CN202995411U (en) | 2012-12-01 | 2012-12-01 | A PLC control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202995411U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121012A (en) * | 2016-06-27 | 2016-11-16 | 湖北扬子江泵业有限责任公司 | A kind of sewerage system |
-
2012
- 2012-12-01 CN CN2012206496327U patent/CN202995411U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121012A (en) * | 2016-06-27 | 2016-11-16 | 湖北扬子江泵业有限责任公司 | A kind of sewerage system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20131201 |