CN106681266B - A redundant switching circuit and method of parallel PLC - Google Patents
A redundant switching circuit and method of parallel PLC Download PDFInfo
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- CN106681266B CN106681266B CN201710025217.1A CN201710025217A CN106681266B CN 106681266 B CN106681266 B CN 106681266B CN 201710025217 A CN201710025217 A CN 201710025217A CN 106681266 B CN106681266 B CN 106681266B
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- 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
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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Abstract
The invention discloses the redundancy switching circuits and method of a kind of parallel connection PLC, the characteristics of for PLC in parallel, a kind of parallel connection PLC switching circuit is designed in conjunction with PLC control program, monitor the condition of the operating status, power supply power supply of two sets of PLC in parallel as execution switching in real time, another set of PLC is state is normal, can safely and reliably disengagement failure PLC power supply in the normal situation of power supply power supply when a set of PLC failure, the hair control operation of guarantee system is gone on smoothly, and realizes the reliable switching of parallel connection PLC.The present invention is in actual use, working properly in multiple carrier rocket PLC launching control systems, can effectively realize the reliable switching control of PLC in parallel.
Description
Technical field
The present invention relates to the redundancy switching circuits and method of a kind of parallel connection PLC, are applied to carrier rocket and test emission control
System.
Background technique
It is operated in the design of carrier rocket Test launch and control system using the hair control that parallel connection PLC completes system, two sets of PLC
Control device parallel connection input and output.In actual use, if the failure of PLC in parallel can only be by way of locally controlling
Cut off its power supply, can not length of run by its dump, control flexibility shortcoming, especially carrier rocket transmitting process carry out to
When the unattended stage, operator can not go to carry out power operation, and there are the hidden danger of safety.
For guarantee parallel connection PLC reliably working state, especially when a set of PLC failure should be able to can length of run be assuredly shut off
Its power supply guarantees that the hair control operation of system is gone on smoothly, needs to be designed PLC in parallel.
Summary of the invention
Technology of the invention solves the problems, such as: in order to overcome the deficiencies of the prior art, providing the redundancy switching electricity of parallel connection PLC a kind of
Road and method, to monitor the condition of the operating status, power supply power supply of two sets of PLC in parallel as execution switching, a set of PLC in real time
When failure another set of PLC state is normal, in the normal situation of power supply power supply can safely and reliably disengagement failure PLC power supply, protect
The hair control operation of card system is gone on smoothly, and realizes the reliable switching of parallel connection PLC.
Technical solution of the invention:
A kind of redundancy switching circuit of parallel connection PLC, including the first power supply, the second power supply, PLC1, PLC2,
PLC1 is in parallel with PLC2, and each PLC includes PLC power module, PLC control module, plc communication module, PLC output module, PLC
Output module, relay KD1, KD2.
The power module of the connection of the power module of first power supply and PLC1, PLC1 is electric by the power supply of the first power supply
Pressure be converted to PLC1 needed for supply voltage, for PLC1 power, the normally-closed contact of relay KD1 be connected on the first power supply with
On the power supply main track of PLC1, the first via input of the input module of the output access PLC1 of the first power supply, the input of PLC1
The output state of the first power supply of module real-time monitoring；The input mould of the first via output access PLC1 of the output module of PLC1
Second tunnel of block inputs, the operating status of the input module real-time monitoring PLC1 of PLC1, and the second tunnel of the output module of PLC1 is defeated
The other end of one end cut-in relay line packet KD2 out, KD2 connects GND；
After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, the first of the output module of PLC1
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC1, indicates the normal operation of PLC1, PLC1 input module
PLC1 operating status position is 1, PLC1 operating status contact closure；The PLC1 input module first via the first power supply of input monitoring
Output, when the output of the first power supply is normal, the first power supply output state position of PLC1 input module is the confession of 1, PLC1
Power supply output contact closure；
After the communication module of PLC1 receives the control signal of long-range switching PLC2 power supply, long-range switch-over control signal is passed
The control module of PLC1 is passed, the control module of PLC1 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 1 of PLC1 is exported, and is connected relay line packet KD2, is connected on
The normally-closed contact KD2 of PLC2 power supply main track is disconnected, cutting PLC2 power supply, and PLC2 is out of service；
The power module of the connection of the power module of second power supply and PLC2, PLC2 is electric by the power supply of the second power supply
Pressure be converted to PLC2 needed for supply voltage, for PLC2 power, the normally-closed contact of relay KD2 be connected on the second power supply with
On the power supply main track of PLC2, the first via input of the input module of the output access PLC2 of the second power supply, the input of PLC2
The output state of the second power supply of module real-time monitoring；The input mould of the first via output access PLC2 of the output module of PLC2
Second tunnel of block inputs, the operating status of the input module real-time monitoring PLC2 of PLC2, and the second tunnel of the output module of PLC2 is defeated
The other end of one end cut-in relay line packet KD1 out, KD1 connects GND；
After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, the first of the output module of PLC2
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates the normal operation of PLC2, PLC2 input module
PLC2 operating status position is 1, PLC2 operating status contact closure；The PLC2 input module first via the second power supply of input monitoring
Output, when the output of the second power supply is normal, the second power supply output state position of PLC2 input module is the confession of 1, PLC2
Power supply output contact closure；
After the communication module of PLC2 receives the control signal of long-range switching PLC1 power supply, long-range switch-over control signal is passed
The control module of PLC2 is passed, the control module of PLC2 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 2 of PLC2 is exported, and is connected relay line packet KD1, is connected on
The normally-closed contact KD1 of PLC1 power supply main track is disconnected, cutting PLC1 power supply, and PLC1 is out of service.
Method of the input module of PLC to the running state real-time monitoring of PLC are as follows:
The second tunnel input of the input module of the first via output access PLC1 of the output module of PLC1, the input mould of PLC1
The operating status of block real-time monitoring PLC1；After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation,
The first via of the output module of PLC1 exports turn on automatically, is linked into the second tunnel of the input module of PLC1, indicates that PLC1 is normal
Operation, the PLC1 operating status position of PLC1 input module are 1, PLC1 operating status contact closure；Make PLC1 operating status contact
For one of the condition of PLC2 power switching, when contact closure, could execute switching；
The second tunnel input of the input module of the first via output access PLC2 of the output module of PLC2, the input mould of PLC2
The operating status of block real-time monitoring PLC2；After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation,
The first via of the output module of PLC2 exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates that PLC2 is normal
Operation, the PLC2 operating status position of PLC2 input module are 1, PLC2 operating status contact closure；Make PLC2 operating status contact
For one of the condition of PLC1 power switching, when contact closure, could execute switching.
Method of the input module of PLC to the power supply real-time monitoring of PLC are as follows:
The first via input of the input module of the output access PLC1 of first power supply, the input module of PLC1 are supervised in real time
The output state of the first power supply is surveyed, when the output of the first power supply is normal, the state of the power supply output of PLC1 input module
The power supply output contact that position is 1, PLC1 is closed；Condition one of of the power supply output contact of PLC1 as PLC2 power switching, touching
Switching could be executed when point closure.
The first via input of the input module of the output access PLC2 of second power supply, the input module of PLC2 are supervised in real time
The output state of the second power supply is surveyed, when the output of the second power supply is normal, the state of the power supply output of PLC2 input module
The power supply output contact that position is 1, PLC2 is closed；Condition one of of the power supply output contact of PLC2 as PLC1 power switching, touching
Switching could be executed when point closure.
The control module of PLC judges the operating status of PLC itself and the method for power supply power supply state are as follows:
In the program of PLC2 power switching, the remotely disconnected PLC2 power supply normally opened contact series connection normally opened touching of PLC1 operating status
Point, the first power supply export normally opened contact, and when PLC1 normal operation, the output of the first power supply are normal, remotely disconnected PLC2 is supplied
After electric normally-closed contact is connected, the line packet for disconnecting PLC2 for electricity output is connected, and the second tunnel of the output module of PLC1 is connected, connect after
The line packet of electric appliance KD1, relay KD1 normally-closed contact are opened, and PLC2 is for electrically disconnected.
In the program of PLC1 power switching, the remotely disconnected PLC1 power supply normally opened contact series connection normally opened touching of PLC2 operating status
Point, the second power supply export normally opened contact, and when PLC2 normal operation, the output of the second power supply are normal, remotely disconnected PLC1 is supplied
After electric normally-closed contact is connected, the line packet for disconnecting PLC1 for electricity output is connected, and the second tunnel of the output module of PLC2 is connected, connect after
The line packet of electric appliance KD2, relay KD2 normally-closed contact are opened, and PLC1 is for electrically disconnected.
A kind of redundancy switching method of parallel connection PLC, specific steps are as follows:
(1) startup power supply is powered for PLC:
The power module of the connection of the power module of first power supply and PLC1, PLC1 is electric by the power supply of the first power supply
Supply voltage needed for pressure is converted to PLC1 is powered for PLC1；
The power module of the connection of the power module of second power supply and PLC2, PLC2 is electric by the power supply of the second power supply
Supply voltage needed for pressure is converted to PLC2 is powered for PLC2；
(2) power supply and PLC self-operating state are monitored in real time:
After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, the first of the output module of PLC1
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC1, indicates the normal operation of PLC1, PLC1 input module
PLC1 operating status position is 1, PLC1 operating status contact closure；The PLC1 input module first via the first power supply of input monitoring
Output, when the output of the first power supply is normal, the first power supply output state position of PLC1 input module is the confession of 1, PLC1
Power supply output contact closure；
After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, the first of the output module of PLC2
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates the normal operation of PLC2, PLC2 input module
PLC2 operating status position is 1, PLC2 operating status contact closure；The PLC2 input module first via the second power supply of input monitoring
Output, when the output of the second power supply is normal, the second power supply output state position of PLC2 input module is the confession of 1, PLC2
Power supply output contact closure；
(3) remote control signal is received, PLC power switching is carried out:
After the communication module of PLC1 receives the control signal of long-range switching PLC2 power supply, long-range switch-over control signal is passed
The control module of PLC1 is passed, the control module of PLC1 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 1 of PLC1 is exported, and is connected relay line packet KD2, is connected on
The normally-closed contact KD2 of PLC2 power supply main track is disconnected, cutting PLC2 power supply, and PLC2 is out of service；
After the communication module of PLC2 receives the control signal of long-range switching PLC1 power supply, long-range switch-over control signal is passed
The control module of PLC2 is passed, the control module of PLC2 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 2 of PLC2 is exported, and is connected relay line packet KD1, is connected on
The normally-closed contact KD1 of PLC1 power supply main track is disconnected, cutting PLC1 power supply, and PLC1 is out of service.
The program of PLC power switching are as follows:
In the program of PLC2 power switching, the remotely disconnected PLC2 power supply normally opened contact series connection normally opened touching of PLC1 operating status
Point, the first power supply export normally opened contact, and when PLC1 normal operation, the output of the first power supply are normal, remotely disconnected PLC2 is supplied
After electric normally-closed contact is connected, the line packet for disconnecting PLC2 for electricity output is connected, and the second tunnel of the output module of PLC1 is connected, connect after
The line packet of electric appliance KD1, relay KD1 normally-closed contact are opened, and PLC2 is for electrically disconnected.
In the program of PLC1 power switching, the remotely disconnected PLC1 power supply normally opened contact series connection normally opened touching of PLC2 operating status
Point, the second power supply export normally opened contact, and when PLC2 normal operation, the output of the second power supply are normal, remotely disconnected PLC1 is supplied
After electric normally-closed contact is connected, the line packet for disconnecting PLC1 for electricity output is connected, and the second tunnel of the output module of PLC2 is connected, connect after
The line packet of electric appliance KD2, relay KD2 normally-closed contact are opened, and PLC1 is for electrically disconnected.
Compared with prior art, the present invention has the following advantages:
(1) present invention is directed to the characteristics of parallel connection PLC, designs a kind of parallel connection PLC switching circuit in conjunction with PLC control program, real
When two sets in parallel PLC of monitoring the condition that switches as execution of operating status, power supply power supply, when a set of PLC failure is another set of
PLC state is normal, in the normal situation of power supply power supply can safely and reliably disengagement failure PLC power supply, guarantee system hair control behaviour
It goes on smoothly, realizes the reliable switching of parallel connection PLC.
(2) a kind of redundancy switching circuit for parallel connection PLC that the present invention designs is applied in multiple carrier rocket PLC launching control systems
In, it is in actual use, working properly, it can effectively realize the reliable switching control of PLC in parallel.
Detailed description of the invention
Fig. 1 is circuit diagram of the present invention；
Fig. 2, Fig. 4 are PLC power switching schematic diagram of the present invention；
Fig. 3, Fig. 5 are that PLC state of the present invention judges schematic diagram；
Fig. 6 is the method for the present invention flow chart.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
A kind of redundancy switching circuit of parallel connection PLC, as shown in Figure 1, include the first power supply, the second power supply,
PLC1, PLC2, PLC1 is in parallel with PLC2, and each PLC includes PLC power module, PLC control module, plc communication module, PLC defeated
Enter module, PLC output module, relay KD1, KD2.
The power module of the connection of the power module of first power supply and PLC1, PLC1 is electric by the power supply of the first power supply
Pressure be converted to PLC1 needed for supply voltage, for PLC1 power, the normally-closed contact of relay KD1 be connected on the first power supply with
On the power supply main track of PLC1, the first via input of the input module of the output access PLC1 of the first power supply, the input of PLC1
The output state of the first power supply of module real-time monitoring；The input mould of the first via output access PLC1 of the output module of PLC1
Second tunnel of block inputs, the operating status of the input module real-time monitoring PLC1 of PLC1, and the second tunnel of the output module of PLC1 is defeated
The other end of one end cut-in relay line packet KD2 out, KD2 connects GND；
After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, the first of the output module of PLC1
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC1, indicates the normal operation of PLC1, PLC1 input module
PLC1 operating status position is 1, PLC1 operating status contact closure；The PLC1 input module first via the first power supply of input monitoring
Output, when the output of the first power supply is normal, the first power supply output state position of PLC1 input module is the confession of 1, PLC1
Power supply output contact closure；
After the communication module of PLC1 receives the control signal of long-range switching PLC2 power supply, long-range switch-over control signal is passed
The control module of PLC1 is passed, the control module of PLC1 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 1 of PLC1 is exported, and is connected relay line packet KD2, is connected on
The normally-closed contact KD2 of PLC2 power supply main track is disconnected, cutting PLC2 power supply, and PLC2 is out of service；
The power module of the connection of the power module of second power supply and PLC2, PLC2 is electric by the power supply of the second power supply
Pressure be converted to PLC2 needed for supply voltage, for PLC2 power, the normally-closed contact of relay KD2 be connected on the second power supply with
On the power supply main track of PLC2, the first via input of the input module of the output access PLC2 of the second power supply, the input of PLC2
The output state of the second power supply of module real-time monitoring；The input mould of the first via output access PLC2 of the output module of PLC2
Second tunnel of block inputs, the operating status of the input module real-time monitoring PLC2 of PLC2, and the second tunnel of the output module of PLC2 is defeated
The other end of one end cut-in relay line packet KD1 out, KD1 connects GND；
After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, the first of the output module of PLC2
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates the normal operation of PLC2, PLC2 input module
PLC2 operating status position is 1, PLC2 operating status contact closure；The PLC2 input module first via the second power supply of input monitoring
Output, when the output of the second power supply is normal, the second power supply output state position of PLC2 input module is the confession of 1, PLC2
Power supply output contact closure；
After the communication module of PLC2 receives the control signal of long-range switching PLC1 power supply, long-range switch-over control signal is passed
The control module of PLC2 is passed, the control module of PLC2 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 2 of PLC2 is exported, and is connected relay line packet KD1, is connected on
The normally-closed contact KD1 of PLC1 power supply main track is disconnected, cutting PLC1 power supply, and PLC1 is out of service.
The input module of PLC is to the method for the running state real-time monitoring of PLC, as shown in Figure 2, Figure 4 shows:
The second tunnel input of the input module of the first via output access PLC1 of the output module of PLC1, the input mould of PLC1
The operating status of block real-time monitoring PLC1；After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation,
The first via of the output module of PLC1 exports turn on automatically, is linked into the second tunnel of the input module of PLC1, indicates that PLC1 is normal
Operation, the PLC1 operating status position of PLC1 input module are 1, PLC1 operating status contact closure；Make PLC1 operating status contact
For one of the condition of PLC2 power switching, when contact closure, could execute switching；
The second tunnel input of the input module of the first via output access PLC2 of the output module of PLC2, the input mould of PLC2
The operating status of block real-time monitoring PLC2；After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation,
The first via of the output module of PLC2 exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates that PLC2 is normal
Operation, the PLC2 operating status position of PLC2 input module are 1, PLC2 operating status contact closure；Make PLC2 operating status contact
For one of the condition of PLC1 power switching, when contact closure, could execute switching.
Method of the input module of PLC to the power supply real-time monitoring of PLC are as follows:
The first via input of the input module of the output access PLC1 of first power supply, the input module of PLC1 are supervised in real time
The output state of the first power supply is surveyed, when the output of the first power supply is normal, the state of the power supply output of PLC1 input module
The power supply output contact that position is 1, PLC1 is closed；Condition one of of the power supply output contact of PLC1 as PLC2 power switching, touching
Switching could be executed when point closure.
The first via input of the input module of the output access PLC2 of second power supply, the input module of PLC2 are supervised in real time
The output state of the second power supply is surveyed, when the output of the second power supply is normal, the state of the power supply output of PLC2 input module
The power supply output contact that position is 1, PLC2 is closed；Condition one of of the power supply output contact of PLC2 as PLC1 power switching, touching
Switching could be executed when point closure.
The control module of PLC judges the operating status of PLC itself and the method for power supply power supply state is, such as Fig. 3, Fig. 5 institute
Show:
In the program of PLC2 power switching, the remotely disconnected PLC2 power supply normally opened contact series connection normally opened touching of PLC1 operating status
Point, the first power supply export normally opened contact, and when PLC1 normal operation, the output of the first power supply are normal, remotely disconnected PLC2 is supplied
After electric normally-closed contact is connected, the line packet for disconnecting PLC2 for electricity output is connected, and the second tunnel of the output module of PLC1 is connected, connect after
The line packet of electric appliance KD1, relay KD1 normally-closed contact are opened, and PLC2 is for electrically disconnected.
In the program of PLC1 power switching, the remotely disconnected PLC1 power supply normally opened contact series connection normally opened touching of PLC2 operating status
Point, the second power supply export normally opened contact, and when PLC2 normal operation, the output of the second power supply are normal, remotely disconnected PLC1 is supplied
After electric normally-closed contact is connected, the line packet for disconnecting PLC1 for electricity output is connected, and the second tunnel of the output module of PLC2 is connected, connect after
The line packet of electric appliance KD2, relay KD2 normally-closed contact are opened, and PLC1 is for electrically disconnected.
A kind of redundancy switching method of parallel connection PLC, as shown in fig. 6, specific steps are as follows:
(1) startup power supply is powered for PLC:
The power module of the connection of the power module of first power supply and PLC1, PLC1 is electric by the power supply of the first power supply
Supply voltage needed for pressure is converted to PLC1 is powered for PLC1；
The power module of the connection of the power module of second power supply and PLC2, PLC2 is electric by the power supply of the second power supply
Supply voltage needed for pressure is converted to PLC2 is powered for PLC2；
(2) power supply and PLC self-operating state are monitored in real time:
After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, the first of the output module of PLC1
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC1, indicates the normal operation of PLC1, PLC1 input module
PLC1 operating status position is 1, PLC1 operating status contact closure；The PLC1 input module first via the first power supply of input monitoring
Output, when the output of the first power supply is normal, the first power supply output state position of PLC1 input module is the confession of 1, PLC1
Power supply output contact closure；
After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, the first of the output module of PLC2
Road exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates the normal operation of PLC2, PLC2 input module
PLC2 operating status position is 1, PLC2 operating status contact closure；The PLC2 input module first via the second power supply of input monitoring
Output, when the output of the second power supply is normal, the second power supply output state position of PLC2 input module is the confession of 1, PLC2
Power supply output contact closure；
(3) remote control signal is received, PLC power switching is carried out:
After the communication module of PLC1 receives the control signal of long-range switching PLC2 power supply, long-range switch-over control signal is passed
The control module of PLC1 is passed, the control module of PLC1 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 1 of PLC1 is exported, and is connected relay line packet KD2, is connected on
The normally-closed contact KD2 of PLC2 power supply main track is disconnected, cutting PLC2 power supply, and PLC2 is out of service；
After the communication module of PLC2 receives the control signal of long-range switching PLC1 power supply, long-range switch-over control signal is passed
The control module of PLC2 is passed, the control module of PLC2 judges the operating status and power supply power supply state of PLC itself, two states
When normal, the second tunnel of output module of the control module control PLC 2 of PLC2 is exported, and is connected relay line packet KD1, is connected on
The normally-closed contact KD1 of PLC1 power supply main track is disconnected, cutting PLC1 power supply, and PLC1 is out of service.
The present invention is directed to the characteristics of parallel connection PLC, designs a kind of parallel connection PLC switching circuit in conjunction with PLC control program, supervises in real time
Control the condition that the operating status of two sets PLC in parallel switches as execution, another set of PLC is normal in state when a set of PLC failure
In the case where can safely and reliably disengagement failure PLC power supply, the hair control operation of guarantee system go on smoothly, and that realizes parallel connection PLC can
By switching.
Specific embodiment
It is in parallel using the identical PLC of two sets of configurations in the design of certain carrier rocket Test launch and control system: PLC1, PLC2,
Every set PLC configures PLC power module, PLC control module, plc communication module and PLC output module, PLC output module.Often
Set PLC passes through communication module, receives long-range control signal and is remotely controlled.
In PLC program design, the input all the way of PLC output module correspond in program %I variable all the way, inputs connect all the way
%I variable normally-closed contact is connected in logical corresponding program；The output all the way of PLC output module corresponds in program %Q variable all the way, journey
%Q variable connects corresponding PLC output module and exports connection all the way in sequence.
Relay KD1 normally-closed contact is sealed in PLC1 power supply main track, it is normally closed to seal in relay KD2 in PLC2 power supply main track
Contact, relay KD1 receive the output module control of PLC2, and relay KD2 receives the output module control of PLC1.PLC1 output
The first via output of module is connected to the second tunnel of input module, the line packet of the second road output control relay KD2.PLC2 exports mould
The first via output of block is connected to the second tunnel of input module, the line packet of the second road output control relay KD1.
As shown in Figure 1, the first power supply, the second power supply are respectively that PLC1, PLC2 power, the first power supply,
The output of second power supply is coupled with the first via of the input module of PLC1, PLC2；The output of first power supply is normal
When, the normally-closed contact %I00350 of the first via of the input module of corresponding PLC1 is connected；The output of second power supply is normal
When, the normally-closed contact %I00462 of the first via of the input module of corresponding PLC2 is connected.
In PLC1 programming, program shown in attached drawing 2 is write, PLC1 powers on normal operation and connects %Q00016, %
Q00016 connects the first via output of PLC1 output module, and the PLC1 output module first via is connected to the second of PLC1 input module
Road, corresponding input variable %I00349 is connected in the second distance sequence of PLC1 input module, i.e. PLC1 starts normal operation
Afterwards, %I00349 is connected.
In PLC1 programming, program shown in attached drawing 3 is write, the series connection PLC1 fortune in the program of long-range disconnected PLC2 power supply
Row instruction %I00349 normally opened contact and the first power supply export %I00350 normally opened contact, and PLC1 normal operation, first supply
When power supply output is normal, %I00034 normally-closed contact is connected after the long-range disconnected PLC2 power supply of connection, the output line that the PLC2 that breaks powers
It wraps %Q00255 to connect, the second tunnel of PLC1 output module is connected, and the line packet of relay KD2, relay KD2 normally-closed contact are connected
It opens, PLC2 is for electrically disconnected.
In PLC2 programming, program shown in attached drawing 4 is write, PLC2 powers on normal operation and connects %Q00088, %
Q00088 connects the first via output of PLC2 output module, and the PLC2 output module first via is connected to the second of PLC2 input module
Road, corresponding input variable %I00461 is connected in the second distance sequence of PLC2 input module, i.e. PLC2 starts normal operation
Afterwards, %I00461 is connected.
In PLC2 programming, program shown in attached drawing 5 is write, the series connection PLC2 fortune in the program of long-range disconnected PLC1 power supply
Row instruction %I00461 normally opened contact and the second power supply export %I00462 normally opened contact, and PLC2 normal operation, second supply
When power supply output is normal, %I00033 normally-closed contact is connected after the long-range disconnected PLC1 power supply of connection, the output line that the PLC1 that breaks powers
It wraps Q00383 to connect, the second tunnel of PLC2 output module is connected, and the line packet of relay KD1 is connected, and relay KD1 normally-closed contact is beaten
It opens, PLC1 is for electrically disconnected.
The present invention is directed to the characteristics of parallel connection PLC, designs a kind of parallel connection PLC switching circuit in conjunction with PLC control program, supervises in real time
Control the operating status of two sets PLC in parallel, the condition that power supply power supply switches as execution, when a set of PLC failure, another set of PLC existed
State is normal, safely and reliably disengagement failure PLC power supply, guarantee system hair control can operate smooth in the normal situation of power supply power supply
It carries out, realizes the reliable switching of parallel connection PLC.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (7)
1. a kind of redundancy switching circuit of parallel connection PLC, which is characterized in that including the first power supply, the second power supply,
PLC1, PLC2, PLC1 is in parallel with PLC2, and each PLC includes PLC power module, PLC control module, plc communication module, PLC defeated
Enter module, PLC output module, relay KD1, KD2；
The power module of the connection of the power module of first power supply and PLC1, PLC1 turns the supply voltage of the first power supply
Supply voltage needed for being changed to PLC1, powers for PLC1, and the normally-closed contact of relay KD1 is connected on the first power supply and PLC1
Power supply main track on, the first power supply output access PLC1 input module the first via input, the input module of PLC1
The output state of the first power supply of real-time monitoring；The input module of the first via output access PLC1 of the output module of PLC1
The second tunnel output of the input of second tunnel, the operating status of the input module real-time monitoring PLC1 of PLC1, the output module of PLC1 connects
Enter the one end relay line packet KD2, the other end of KD2 connects GND；
After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, the first via of the output module of PLC1 is defeated
Turn on automatically out is linked into the second tunnel input of the input module of PLC1, indicates the normal operation of PLC1, PLC1 input module
PLC1 operating status position is 1, PLC1 operating status contact closure；The PLC1 input module first via the first power supply of input monitoring
Output, when the output of the first power supply is normal, the first power supply output state position of PLC1 input module is the confession of 1, PLC1
Power supply output contact closure；
After the communication module of PLC1 receives the control signal of long-range switching PLC2 power supply, long-range switch-over control signal is passed to
The control module of PLC1, the control module of PLC1 judge the operating status and power supply power supply state of PLC itself, and two states are just
The second tunnel of output module of the control module control PLC 1 of Chang Shi, PLC1 exports, and connects relay line packet KD2, is connected on PLC2
The normally-closed contact KD2 of power supply main track is disconnected, cutting PLC2 power supply, and PLC2 is out of service；
The power module of the connection of the power module of second power supply and PLC2, PLC2 turns the supply voltage of the second power supply
Supply voltage needed for being changed to PLC2, powers for PLC2, and the normally-closed contact of relay KD2 is connected on the second power supply and PLC2
Power supply main track on, the second power supply output access PLC2 input module the first via input, the input module of PLC2
The output state of the second power supply of real-time monitoring；The input module of the first via output access PLC2 of the output module of PLC2
The second tunnel output of the input of second tunnel, the operating status of the input module real-time monitoring PLC2 of PLC2, the output module of PLC2 connects
Enter the one end relay line packet KD1, the other end of KD1 connects GND；
After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, the first via of the output module of PLC2 is defeated
Turn on automatically out is linked into the second tunnel of the input module of PLC2, indicates the normal operation of PLC2, the PLC2 of PLC2 input module
Operating status position is 1, PLC2 operating status contact closure；The PLC2 input module first via the second power supply of input monitoring is defeated
Out, when the output of the second power supply is normal, the second power supply output state position of PLC2 input module is the power supply of 1, PLC2
Power supply output contact closure；
After the communication module of PLC2 receives the control signal of long-range switching PLC1 power supply, long-range switch-over control signal is passed to
The control module of PLC2, the control module of PLC2 judge the operating status and power supply power supply state of PLC itself, and two states are just
The second tunnel of output module of the control module control PLC 2 of Chang Shi, PLC2 exports, and connects relay line packet KD1, is connected on PLC1
The normally-closed contact KD1 of power supply main track is disconnected, cutting PLC1 power supply, and PLC1 is out of service.
2. a kind of redundancy switching circuit of parallel connection PLC as described in claim 1, which is characterized in that the input module pair of PLC
The method of the running state real-time monitoring of PLC are as follows:
The second tunnel input of the input module of the first via output access PLC1 of the output module of PLC1, the input module of PLC1 are real
When monitor PLC1 operating status；After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, PLC1's
The first via of output module exports turn on automatically, is linked into the second tunnel input of the input module of PLC1, indicates that PLC1 is normally transported
Row, the PLC1 operating status position of PLC1 input module are 1, PLC1 operating status contact closure；The contact conduct of PLC1 operating status
One of the condition of PLC2 power switching, when contact closure, could execute switching；
The second tunnel input of the input module of the first via output access PLC2 of the output module of PLC2, the input module of PLC2 are real
When monitor PLC2 operating status；After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, PLC2's
The first via of output module exports turn on automatically, is linked into the second tunnel of the input module of PLC2, indicates that PLC2 is operated normally,
The PLC2 operating status position of PLC2 input module is 1, PLC2 operating status contact closure；PLC2 operating status contact is as PLC1
One of condition of power switching, when contact closure, could execute switching.
3. a kind of redundancy switching circuit of parallel connection PLC as described in claim 1, which is characterized in that the input module pair of PLC
The method of the power supply power supply real-time monitoring of PLC are as follows:
The first via input of the input module of the output access PLC1 of first power supply, the input module real-time monitoring of PLC1 the
The output state of one power supply, when the output of the first power supply is normal, the mode bit of the power supply output of PLC1 input module is
1, PLC1 power supply output contact closure；Condition one of of the power supply output contact of PLC1 as PLC2 power switching, contact is closed
Switching could be executed when conjunction；
The first via input of the input module of the output access PLC2 of second power supply, the input module real-time monitoring of PLC2 the
The output state of two power supplies, when the output of the second power supply is normal, the mode bit of the power supply output of PLC2 input module is
1, PLC2 power supply output contact closure；Condition one of of the power supply output contact of PLC2 as PLC1 power switching, contact is closed
Switching could be executed when conjunction.
4. a kind of redundancy switching circuit of parallel connection PLC as described in claim 1, which is characterized in that the method for PLC power switching
Are as follows:
In the PLC2 power switching the step of, remotely disconnected PLC2 power supply normally opened contact series connection PLC1 operating status normally opened contact, the
One power supply exports normally opened contact, and when PLC1 normal operation, the output of the first power supply are normal, remotely disconnected PLC2 power supply is normally closed
After contact is connected, the line packet for disconnecting PLC2 for electricity output is connected, and the second tunnel of the output module of PLC1 is connected, and connects relay
The line packet of KD1, relay KD1 normally-closed contact are opened, and PLC2 is for electrically disconnected；
In the PLC1 power switching the step of, remotely disconnected PLC1 power supply normally opened contact series connection PLC2 operating status normally opened contact, the
Two power supplies export normally opened contact, and when PLC2 normal operation, the output of the second power supply are normal, remotely disconnected PLC1 power supply is normally closed
After contact is connected, the line packet for disconnecting PLC1 for electricity output is connected, and the second tunnel of the output module of PLC2 is connected, and connects relay
The line packet of KD2, relay KD2 normally-closed contact are opened, and PLC1 is for electrically disconnected.
5. a kind of redundancy switching method of parallel connection PLC, which is characterized in that specific steps are as follows:
(1) startup power supply is powered for PLC:
The power module of the connection of the power module of first power supply and PLC1, PLC1 turns the supply voltage of the first power supply
Supply voltage needed for being changed to PLC1 is powered for PLC1；
The power module of the connection of the power module of second power supply and PLC2, PLC2 turns the supply voltage of the second power supply
Supply voltage needed for being changed to PLC2 is powered for PLC2；
(2) power supply power supply and PLC self-operating state are monitored in real time:
After the upper electricity operation of PLC1, the control module automatic running of PLC1, when normal operation, the first via of the output module of PLC1 is defeated
Turn on automatically out is linked into the second tunnel input of the input module of PLC1, indicates the normal operation of PLC1, PLC1 input module
PLC1 operating status position is 1, PLC1 operating status contact closure；The PLC1 input module first via the first power supply of input monitoring
Output, when the output of the first power supply is normal, the first power supply output state position of PLC1 input module is the confession of 1, PLC1
Power supply output contact closure；
After the upper electricity operation of PLC2, the control module automatic running of PLC2, when normal operation, the first via of the output module of PLC2 is defeated
Turn on automatically out is linked into the second tunnel of the input module of PLC2, indicates the normal operation of PLC2, the PLC2 of PLC2 input module
Operating status position is 1, PLC2 operating status contact closure；The PLC2 input module first via the second power supply of input monitoring is defeated
Out, when the output of the second power supply is normal, the second power supply output state position of PLC2 input module is the power supply of 1, PLC2
Power supply output contact closure；
(3) remote control signal is received, PLC power switching is carried out:
After the communication module of PLC1 receives the control signal of long-range switching PLC2 power supply, long-range switch-over control signal is passed to
The control module of PLC1, the control module of PLC1 judge the operating status and power supply power supply state of PLC itself, and two states are just
The second tunnel of output module of the control module control PLC 1 of Chang Shi, PLC1 exports, and connects relay line packet KD2, is connected on PLC2
The normally-closed contact KD2 of power supply main track is disconnected, cutting PLC2 power supply, and PLC2 is out of service；
After the communication module of PLC2 receives the control signal of long-range switching PLC1 power supply, long-range switch-over control signal is passed to
The control module of PLC2, the control module of PLC2 judge the operating status and power supply power supply state of PLC itself, and two states are just
The second tunnel of output module of the control module control PLC 2 of Chang Shi, PLC2 exports, and connects relay line packet KD1, is connected on PLC1
The normally-closed contact KD1 of power supply main track is disconnected, cutting PLC1 power supply, and PLC1 is out of service.
6. a kind of redundancy switching method of parallel connection PLC as claimed in claim 5, which is characterized in that the control module of PLC judges
The method of the operating status and power supply output state of PLC itself are as follows:
In the PLC2 power switching the step of, remotely disconnected PLC2 power supply normally opened contact series connection PLC1 operating status normally opened contact, the
One power supply exports normally opened contact, and when PLC1 normal operation, the output of the first power supply are normal, remotely disconnected PLC2 power supply is normally closed
After contact is connected, the line packet for disconnecting PLC2 for electricity output is connected, and the second tunnel of the output module of PLC1 is connected, and connects relay
The line packet of KD1, relay KD1 normally-closed contact are opened, and PLC2 is for electrically disconnected；
In the PLC1 power switching the step of, remotely disconnected PLC1 power supply normally opened contact series connection PLC2 operating status normally opened contact, the
Two power supplies export normally opened contact, and when PLC2 normal operation, the output of the second power supply are normal, remotely disconnected PLC1 power supply is normally closed
After contact is connected, the line packet for disconnecting PLC1 for electricity output is connected, and the second tunnel of the output module of PLC2 is connected, and connects relay
The line packet of KD2, relay KD2 normally-closed contact are opened, and PLC1 is for electrically disconnected.
7. a kind of redundancy switching method of parallel connection PLC as claimed in claim 6, which is characterized in that the method for PLC power switching
Are as follows:
In the PLC2 power switching the step of, remotely disconnected PLC2 power supply normally opened contact series connection PLC1 operating status normally opened contact, the
One power supply exports normally opened contact, and when PLC1 normal operation, the output of the first power supply are normal, remotely disconnected PLC2 power supply is normally closed
After contact is connected, the line packet for disconnecting PLC2 for electricity output is connected, and the second tunnel of the output module of PLC1 is connected, and connects relay
The line packet of KD1, relay KD1 normally-closed contact are opened, and PLC2 is for electrically disconnected；
In the PLC1 power switching the step of, remotely disconnected PLC1 power supply normally opened contact series connection PLC2 operating status normally opened contact, the
Two power supplies export normally opened contact, and when PLC2 normal operation, the output of the second power supply are normal, remotely disconnected PLC1 power supply is normally closed
After contact is connected, the line packet for disconnecting PLC1 for electricity output is connected, and the second tunnel of the output module of PLC2 is connected, and connects relay
The line packet of KD2, relay KD2 normally-closed contact are opened, and PLC1 is for electrically disconnected.
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| CN107479541B (en) * | 2017-09-22 | 2019-09-24 | 武汉微智创大科技有限公司 | A kind of wireless remote timing control switch Standby control method |
| CN116780740B (en) * | 2023-06-15 | 2024-05-07 | 东方空间技术(山东)有限公司 | Rocket launching pad electrical system |
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| JP6051547B2 (en) * | 2012-03-15 | 2016-12-27 | オムロン株式会社 | Control device |
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| CN201118277Y (en) * | 2007-09-04 | 2008-09-17 | 北京鼎汉技术股份有限公司 | Electrical source switching device |
| CN201286030Y (en) * | 2008-06-11 | 2009-08-05 | 谢维 | 10kV complicated electricity supply and distribution control system based on PLC |
| CN202135046U (en) * | 2011-07-12 | 2012-02-01 | 中国西电电气股份有限公司 | Frequency converter control device |
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