CN202615179U - PLC control system possessing automatic protection function - Google Patents
PLC control system possessing automatic protection function Download PDFInfo
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- CN202615179U CN202615179U CN 201120576427 CN201120576427U CN202615179U CN 202615179 U CN202615179 U CN 202615179U CN 201120576427 CN201120576427 CN 201120576427 CN 201120576427 U CN201120576427 U CN 201120576427U CN 202615179 U CN202615179 U CN 202615179U
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Abstract
The utility model provides a PLC control system possessing an automatic protection function and belongs to the control system technology field. The PLC control system possessing the automatic protection function comprises a main circuit including controlled automation equipment and a control circuit which controls on and off of a power supply circuit of the main circuit. The control circuit comprises a PLC power supply loop, a sensor power supply loop, an output control power supply loop and a safety control loop, wherein the PLC power supply loop, the sensor power supply loop and the output control power supply loop are accessed to a power supply power line of the PLC control system respectively; the safety control loop is formed by a first power on detection element and a second induction switch which are connected in series. The safety control loop is accessed to any one of the PLC power supply loop and the sensor power supply loop.
Description
Technical field
The utility model belongs to the control system technical field, relates to a kind of PLC control system, particularly a kind of PLC control system with safety protection function.
Background technology
The control circuit of PLC control system partly generally includes following components: 1, PLC electric power loop-by the control of power switch independently; 2, sensor electrical resource loop-as the power circuit of sensor element work, the output dc low-voltage; : 3, the control power supply of output control electric power loop-output driving element (like A.C. contactor, relay).
The main circuit of PLC control system partly connects controlled automation equipment.The output of output control electric power loop is directly connected to the action output of automation equipment; When appearance such as PLC electric power loop, sensor electrical resource loop are unusual; Usually need carry out anxious the stopping of electric power and operate, so need carry out strict more electric power control it to this loop.
In the automated system that with PLC is the basis; The security control loop is common hardware security interlocking loop; Urgency of the prior art is stopped the security control loop and is only paid close attention to the mutual control action between emergency stop switch and the output control electric power loop mostly; And ignored the safety interlock of asking of PLC electric power loop and sensor electrical resource loop and output control circuit, or only there be of the security control of PLC electric power loop to the out-put supply control circuit.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind of PLC system with automatic protection functions.
The purpose of the utility model can realize through following technical proposal: a kind of PLC control system with automatic protection functions; Comprise the main circuit that includes controlled automation equipment, the feed circuit conducting of control main circuit and the control circuit of disconnection; Wherein, Control circuit comprises PLC electric power loop, sensor electrical resource loop, the output control electric power loop of the power supply line of electric force that inserts the PLC control system respectively; It also comprises a security control loop that is formed by electrical detecting element on first and the series connection of second inductive switch, in the two any one of security control loop access PLC electric power loop, sensor electrical resource loop.
As preferably, the PLC electric power loop is inserted in the security control loop parallelly connectedly, the sensor electrical resource loop be provided be used to control second inductive switch second on electrical detecting element.As preferably, be provided with first inductive switch that is controlled by electrical detecting element on first in the output control electric power loop.
As preferably, the security control loop also is in series with an emergency stop switch.
As preferably, the voltage output end of PLC electric power loop is connected with electrical detecting element on the 3rd, is connected with the 3rd inductive switch that is controlled by electrical detecting element on the 3rd on the main circuit.
Compared with prior art, the operate as normal of the utility model PLC electric power loop and sensor electrical resource loop is set to export the work prerequisite of control electric power loop, and the exciting voltage output terminal is to the main circuit outputting drive voltage then.This set has been avoided the still blindly action under the unusual situation of control circuit of controlled automation equipment, plays the effect of the controlled automation equipment of protection, also plays guaranteeing automation equipment action security simultaneously.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Among the figure, 11, control circuit; 12, main circuit; 111, PLC electric power loop; 112, sensor electrical resource loop; 113, output control electric power loop .M, automation equipment; The controlled part of KM1, first relay; The control section of KM1 ', first relay; The controlled part of KM2, second relay; The control section of KM2 ', second relay; The controlled part of KM3, the 3rd relay; The control section of KM3 ', the 3rd relay.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technical scheme of the utility model is done further to describe, but the utility model is not limited to these embodiment.
In the present embodiment, adopt the element of relay as the back connection circuit that powers at testing circuit, concrete, the control section of relay is as last electrical detecting element, and the controlled part of relay is as inductive switch.Native system comprises the main circuit 12 and control circuit 11 that inserts the power supply line of electric force respectively; Wherein main circuit 12 comprises the controlled Partial K M3 and the automation equipment M of the 3rd relay, and main circuit 12 inserts triple-phase line L1, L2, the L3 of power supply line of electric force, and phase line is provided with power switch QF1; When power switch QF1 is closed; Phase line is supplied power to main circuit 12 and control circuit 11, when the controlled Partial K M3 of the 3rd relay connects, and the feed circuit conducting of automation equipment M; Control circuit 11; Comprise phase line L3 of the power supply line of electric force that is connected on the PLC control system respectively and PLC electric power loop 111, sensor electrical resource loop 112, the output control electric power loop 113 between the zero line N; The power supply line of electric force incoming end in above-mentioned three loops is respectively arranged with independently power switch; With corresponding QF2, QF3, the QF4 of being followed successively by in above-mentioned three loops, when power switch was closed, the power supply line of electric force was inserted in corresponding loop.
PLC electric power loop 111 comprises the phase line incoming end a1 that is connected with phase line L3 and the zero line incoming end a2 that is connected with zero line N, a Programmable Logic Controller C; Phase line incoming end a1 is connected with direct supply incoming end L, the N of Programmable Logic Controller C respectively with zero line incoming end a2; Be provided with power switch QF2 between the direct supply incoming end L of phase line incoming end a1 and Programmable Logic Controller C and between the direct supply incoming end N of zero line incoming end a2 and Programmable Logic Controller C; When power switch QF2 is closed; 111 power supplies of PLC electric power loop are connected, and Programmable Logic Controller C gets into duty.
Sensor electrical resource loop 112 comprises the phase line incoming end b1 that is connected with phase line L3 and the zero line incoming end b2 that is connected with zero line N, be used for converting alternating current to galvanic power supply changeover device and sensor that at least one is parallelly connected with power supply changeover device; Phase line incoming end b1 is connected with direct supply incoming end L, the N of power supply changeover device respectively with zero line incoming end b2; Be provided with power switch QF3 between the direct supply incoming end L of phase line incoming end b1 and power supply changeover device and between the direct supply incoming end N of zero line incoming end b2 and power supply changeover device; When power switch QF3 is closed; The power connection of power supply changeover device, sensor gets into duty.
Output control electric power loop 113 comprises the controlled Partial K M1 of the phase line incoming end c1 that is connected with phase line L3 and the zero line incoming end c2 that is connected with zero line N, power switch QF3, first relay; When the equal closure of the control section KM1 ' of power switch QF3, first relay; The L331 termination of output control electric power loop 113 is gone into the COM end of Programmable Logic Controller C; Its N31 termination is gone into the Y003 end of Programmable Logic Controller C; When voltage reached setting, the controlled Partial K M3 of the control section of the 3rd sensor (representing with the KM3 that has square frame among the figure) control the 3rd sensor was closed, made main circuit 12 insert the power supply line of electric force.
Be provided with the second relay K M2 between PLC electric power loop 111 and the sensor electrical resource loop 112.Concrete, the control section KM2 ' of second relay is arranged on the dc output end of power supply changeover device of sensor electrical resource loop 112 parallelly connectedly, and the controlled Partial K M2 of second relay is arranged on the PLC electric power loop 111.The electric power thus supplied that detects each sensor in the sensor electrical resource loop 112 as the control section KM2 ' of second relay is (sensor electrical resource loop 112 normally powers on) just often; The controlled Partial K M2 of second relay is closed, to carry out the electrifying condition inspection of PLC electric power loop 111.
Be provided with the first relay K M1 between PLC electric power loop 111 and the output control electric power loop 113.Concrete; The control section KM1 ' of first relay is arranged on the PLC electric power loop 111; The controlled Partial K M1 of first relay is arranged on the output control electric power loop 113; The control section KM1 ' of first relay, the controlled Partial K M2 of second relay are in series with an emergency stop switch and are connected, and the series arm parallel connection that they form inserts PLC electric power loop 111.The electric power thus supplied that detects PLC electric power loop 111 as the control section KM1 ' of first relay just often, promptly PLC electric power loop 111 has powered on, Programmable Logic Controller C is in readiness, the controlled Partial K M1 of first relay is closed.
At control section 11 before main circuit 12 output voltages; Carry out the sensor electrical resource loop electro-detection on electro-detection and the voltage output end that powers on detection, the PLC electric power loop successively; Make when having only three conditions that satisfy simultaneously that the PLC electric power loop powers on, emergency stop switch is in release conditions, probe power has powered on; The controlled Partial K M1 of first relay can be closed, and when above-mentioned three conditions had one not satisfy, the controlled Partial K M1 of first relay can automatic cutout; The output action of automation equipment M stops, and guarantees the action safety of automation equipment M according to this.
Selectable; Also can be be arranged on the sensor electrical source circuit 112 parallelly connectedly by the controlled Partial K M2 of emergency stop switch SB1, second relay, the safety control circuit that the control section KM1 ' of first relay forms; And the control section KM2 ' of second relay is arranged on the PLC electric power loop; Like this; At control circuit 11 before main circuit 12 output voltages, will carry out successively electro-detection on the PLC electric power loop, sensor electrical resource loop power on detect and voltage output end on electro-detection.
Claims (5)
1. PLC control system with automatic protection functions; It is characterized in that; Comprise the main circuit (12) that includes controlled automation equipment (M), the feed circuit conducting of control main circuit (12) and the control circuit (11) of disconnection; Wherein, Control circuit (11) comprises PLC electric power loop (111), sensor electrical resource loop (112), the output control electric power loop (113) of the power supply line of electric force that inserts the PLC control system respectively, and it also comprises a security control loop that is formed by electrical detecting element on first and the series connection of second inductive switch, in the two any one of security control loop access PLC electric power loop (111), sensor electrical resource loop (112).
2. the PLC control system with automatic protection functions according to claim 1; It is characterized in that; PLC electric power loop (111) is inserted in described security control loop parallelly connectedly, sensor electrical resource loop (112) be provided be used to control second inductive switch second on electrical detecting element.
3. the PLC control system with automatic protection functions according to claim 1 is characterized in that, is provided with first inductive switch that is controlled by electrical detecting element on first in the described output control electric power loop (113).
4. the PLC control system with automatic protection functions according to claim 1 is characterized in that described security control loop also is in series with an emergency stop switch.
5. the PLC control system with automatic protection functions according to claim 1; It is characterized in that; The voltage output end of described PLC electric power loop (111) is connected with electrical detecting element on the 3rd, is connected with the 3rd inductive switch that is controlled by electrical detecting element on the 3rd on the main circuit (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120576427 CN202615179U (en) | 2011-12-25 | 2011-12-25 | PLC control system possessing automatic protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120576427 CN202615179U (en) | 2011-12-25 | 2011-12-25 | PLC control system possessing automatic protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202615179U true CN202615179U (en) | 2012-12-19 |
Family
ID=47348864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120576427 Expired - Fee Related CN202615179U (en) | 2011-12-25 | 2011-12-25 | PLC control system possessing automatic protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202615179U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720404A (en) * | 2012-06-22 | 2012-10-10 | 何安棋 | Combined safeguard door lock |
| CN103197591A (en) * | 2013-04-03 | 2013-07-10 | 天津长荣印刷设备股份有限公司 | Self-checking circuit of preventing misoperation of wiring and working method thereof |
| CN103995494A (en) * | 2014-05-22 | 2014-08-20 | 中国石油化工股份有限公司 | Pressure protection system for key equipment of chemical engineering device |
-
2011
- 2011-12-25 CN CN 201120576427 patent/CN202615179U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720404A (en) * | 2012-06-22 | 2012-10-10 | 何安棋 | Combined safeguard door lock |
| CN103197591A (en) * | 2013-04-03 | 2013-07-10 | 天津长荣印刷设备股份有限公司 | Self-checking circuit of preventing misoperation of wiring and working method thereof |
| CN103197591B (en) * | 2013-04-03 | 2015-08-19 | 天津长荣印刷设备股份有限公司 | A kind of self-checking circuit of anti-wiring maloperation and method of work thereof |
| CN103995494A (en) * | 2014-05-22 | 2014-08-20 | 中国石油化工股份有限公司 | Pressure protection system for key equipment of chemical engineering device |
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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: 20121219 Termination date: 20131225 |