CN204462766U - The intelligent electric of support loop Redundant Control controls executive system - Google Patents
The intelligent electric of support loop Redundant Control controls executive system Download PDFInfo
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- CN204462766U CN204462766U CN201420863517.9U CN201420863517U CN204462766U CN 204462766 U CN204462766 U CN 204462766U CN 201420863517 U CN201420863517 U CN 201420863517U CN 204462766 U CN204462766 U CN 204462766U
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Abstract
The utility model belongs to electric operator control technology field, the intelligent electric relating to a kind of support loop Redundant Control controls executive system, the driving circuit comprising master control micro-control unit and be connected with master control micro-control unit, signal processing circuit and electronic moment testing circuit, it is characterized in that: also comprise auxiliary micro-control unit, man-machine display interface, position transmitter, Modbus loop redundancy communication card, power module are connected with auxiliary micro-control unit respectively with low-power consumption treatment circuit; Connected by RS-232 between described master control micro-control unit and auxiliary micro-control unit.The compatible original switching value of the utility model and 4-20mA analog quantity communication function; Intelligent electric actuating mechanism can carry out combination in any to Analog control signal and Modbus loop redundancy control signal; Loop Redundant Control is the control technology of DCS system maturation, improves the high reliability of intelligent electric actuating mechanism.
Description
Technical field
The utility model belongs to intelligent electric actuating mechanism control technology field, and particularly a kind of intelligent electric of support loop Redundant Control controls executive system.
Background technology
Electric operator is one of large main instrument of automatic field three, along with the aggravation of manufacturing industry competition, manufacturer pursues the reliability of production equipment more, in some system of the industry robotizations such as oil, chemical industry, metallurgy, light industry, food, building materials, environmental protection, require that control device has high reliability, especially those control the equipment of key production process, often need to adopt redundant configuration.Redundant Control makes system operationally not by the impact of local single failure, can realize on-line maintenance; Meanwhile, when trouble unit off-line is repaired, also influential system does not normally run, thus can reach the object improving system reliability and reduce crash rate.Rational Redundancy Design will improve the reliability of system greatly, effectively avoids the economic loss that the stopping production that causes because control system breaks down or device damage cause.Therefore research and develop the analogue technique that both can use 4-20mA, the intelligent electric actuating mechanism of the support loop Redundant Control of field bus communication technology also can be used to have very large realistic meaning.
Summary of the invention
The technical problems to be solved in the utility model is the problem that cannot realize loop Redundant Control and high reliability for existing intelligent electric actuating mechanism, proposes the intelligent electric control executive system that a kind of support loop controls.
The technical solution of the utility model is: a kind of intelligent electric of support loop Redundant Control controls executive system, the driving circuit comprising master control micro-control unit and be connected with master control micro-control unit, signal processing circuit and electronic moment testing circuit, it is characterized in that: also comprise auxiliary micro-control unit, man-machine display interface, position transmitter, Modbus loop redundancy communication card, power module are connected with auxiliary micro-control unit respectively with low-power consumption treatment circuit; Connected by RS-232 between described master control micro-control unit and auxiliary micro-control unit.
The above auxiliary micro-control unit selects PIC18F87K90, is with two enhancement mode USART serial communication modules, can connect one piece of Modbus loop redundancy communication card.
The micro-control unit of the above Modbus loop redundancy communication card selects PIC18F25K22, is with two enhancement mode USART serial communication modules, and supports relay function.
The beneficial effects of the utility model are: (1) compatible original switching value and 4-20mA analog quantity communication function; (2) intelligent electric actuating mechanism also can realize Modbus loop Redundant Control, and supports relay function, can carry out combination in any to Analog control signal and Modbus loop redundancy control signal; (3) loop Redundant Control is the control technology of DCS system maturation, improves the high reliability of intelligent electric actuating mechanism, thus further increases the availability of support loop redundancy control system.
Accompanying drawing explanation
Fig. 1 is that the intelligent electric of the utility model support loop Redundant Control controls executive system theory diagram;
Fig. 2 is that the intelligent electric of the utility model support loop Redundant Control controls executive system messaging diagrams;
Fig. 3 is the utility model typical loop redundancy control system schematic diagram;
Fig. 4 is that the utility model loop fault connects transition diagram;
Fig. 5 is the utility model Modbus loop redundant card slave station initialization procedure figure.
Embodiment
Fig. 1 is that the intelligent electric of support loop Redundant Control controls executive system theory diagram.The intelligent electric of support loop Redundant Control controls executive system, the driving circuit 3, signal processing circuit 10 and the electronic moment testing circuit 12 that comprise master control micro-control unit 8 and be connected with master control micro-control unit 8, it is characterized in that: also comprise auxiliary micro-control unit 9, man-machine display interface 2, position transmitter 4, Modbus loop redundancy communication card 6, power module 7 are connected with auxiliary micro-control unit 9 respectively with low-power consumption treatment circuit 11; Connected by RS-232 between described master control micro-control unit 8 and auxiliary micro-control unit 9 and exchange data.Whole control divides two micro-control units to realize, and master control micro-control unit 8 is responsible for the control and protection part of system, and auxiliary micro-control unit 9 is responsible for display, operation, counting and low power consumption control.Assist and exchange data with RS-232 between micro-control unit 9 and loop redundancy communication card 6.Driving circuit 3 also comprises the control circuit of solid-state relay and composition thereof; Power module 7 provides power supply for main control microprocessor 8 and support microprocessor 9.
Switching value and 4-20mA analog input signal send master control micro-control unit 8 after signal processing circuit 10 processes, electronic moment testing circuit 12 output signal send master control micro-control unit 8, master control micro-control unit 8 is sent after the position detection signal process that auxiliary micro-control unit 9 receiving position transmitter is sent here, signal from signal processing circuit 10 compares computing with the simulating signal from position transmitter 4 through master control micro-control unit 8, driving circuit 3 is output a control signal to according to both deviations, driving circuit 3 exports control three phase electric machine 5 and moves, the stroke of three phase electric machine 5 feeds back to auxiliary micro-control unit 9 by position transmitter 4 simultaneously and forms closed-loop control.Meanwhile, Modbus loop redundancy communication card and the communication of loop control unit master station, outer signals also processes rear feeding by Modbus loop redundancy communication card 6 and assists micro-control unit 9.Man-machine interface 2 setup parameter exports auxiliary micro-control unit 9, and this auxiliary micro-control unit 9 output state value shows to man-machine interface 2.
The utility model is by arranging Modbus loop redundancy communication card 6, master control micro-control unit 8, auxiliary micro-control unit 9, the position detection signal that 4-20mA analog input signal send master control micro-control unit 8 and the position transmitter 4 received from auxiliary micro-control unit 9 to send here through signal processing circuit 10 processes through master control micro-control unit 8, compare computing, driving circuit 3 is output a control signal to according to both deviations, realize the location of intelligent electric actuating mechanism and drive motor 5 moves, the stroke of motor 5 feeds back to auxiliary micro-control unit 9 by position transmitter 4 simultaneously and forms closed-loop control, simultaneously, Modbus loop redundancy communication card 6 is by the data of in running order loop redundancy communication interface from loop control unit master station, be transmitted to auxiliary micro-control unit 9 on intelligent electric actuating mechanism body to process, the result of process sends to loop control unit master station (messaging diagrams as shown in Figure 2) through in running order loop redundancy communication interface.In the utility model, when Long-distance Control source is set to Modbus loop redundancy communication, primary variables, control information, other procedure parameters, device configuration, calibration and configuration info are are all received and dispatched by loop redundancy communication card 6 by micro-control unit 9 auxiliary on intelligent electric actuating mechanism body.
Master control micro-control unit 8 of the present utility model inner integrated 8 Channel 12-Bit ADC converters, 2 channel voltage type, 12 DAC converters, many peripheral chips can be saved up to data XRAM storer in 62KB in-chip FLASH/EEROM storer, 4KB in-chip FLASH/EERAM storer and 2KB sheet, greatly simplify hardware circuit design.
Auxiliary micro-control unit 9 of the present utility model can select PIC18F87K90.PIC18F87K90 has a series of serial communication peripheral hardware, comprising two enhancement mode USART serial communication modules, can connect one piece of Modbus loop redundancy communication card; 24 12, tunnel A/D converters; LP WatchDog Timer (WDT); Band LCD driver; Many peripheral chips can be saved up to the FLASH memory of 128KB, the RAM storer of 4KB, greatly simplify hardware circuit design.
The micro-control unit of loop redundancy communication card 6 of the present utility model can select PIC18F25K22, and comprising two enhancement mode EUSART serial communication modules, this serial communication module can carry out the RS-232 communication of standard, and supports relay function; 10 A/D converters; LP WatchDog Timer (WDT); The data EPPROM storer of the FLASH storer of 32KB, the RAM storer of 1.5KB and 256Byte.
Loop redundant communication system adopts paired cable to connect each field control unit successively, sends signal and returns, form a two-wire loop with a two-wire cable from master station.Each field apparatus all possesses the communication channel of redundancy in both direction.Use binary channels communication that whole system can be protected when a channel communications fault, prevent whole system from occurring collapse.Data transmit use generally accepted Modbus RTU communications protocol, meanwhile, product support relay function, namely during in-site installation without the need to extra repeater.
As shown in Figure 3, when normally working, namely port A and port B also can be used as receiver as transmitter to typical loop redundancy control system.When port A is as transmitter, port B is receiver, now, from the Modbus request data frame that master station sends, and " entering " from port A " going out " to port B, then " the entering " from port B " going out " to port A.In like manner, when port B is as transmitter, port A is receiver, now, from the Modbus request data frame that master station sends, and " entering " from port B " going out " to port A, then " the entering " from port A " going out " to port B.
Usually, cable adopts the connected mode of two-wire loop, like this any one loop damage or be short-circuited, the fault such as open circuit time all can not affect the proper communication in another loop.If there is on-the-spot circuit or field module fault, system can by failure bypass or isolation, simultaneously can the normal control of all other parts of keeping system.Such as, if do not have to arrive the field unit be positioned at after fault from the signal of main website initiation, we can select another road in redundant loop through having carried out the communication work of other field unit signal, as shown in Figure 4.
Control system of the present utility model is when normally powering on, Modbus loop redundancy communication card and 4-20mA analog signal input card carry out initialization respectively, communicate if control mode is long-range Modbus, before Modbus loop redundancy communication card in loop control unit master station and loop redundancy communication interface exchanges data, main website must define slave station parameter and this slave station of configuration, namely completes slave station (loop redundancy communication card) power up initialization process.Slave station (loop redundancy communication card) initialization procedure is as shown in Figure 5: first loop control unit main website checks that Modbus loop redundancy communication card (slave station) of loop redundancy communication interface is whether in bus, if this loop redundancy communication card is in running order, then main website checks loop redundancy communication card preparation by request slave station diagnostic data, when when in running order loop redundancy communication card report, it is ready to, slave station supplemental characteristic and configuration data are sent to this Modbus loop redundancy communication card by main website, whether main website asks the diagnostic data of slave station ready to be sure of this loop redundancy communication card again.After completing parametrization and configuration data contrast, main website starts and in running order loop redundancy communication card circulation exchanging user data.
When in running order loop redundancy communication is stuck in proper communication, inner house dog WDT can be started communication process is monitored, once WDT overflows, represent that this loop redundancy communication cartoon news break down.WDT time-out can force device to reset, and system can be restarted.
The utility model adds loop redundancy communication and controls on the basis of intelligent electric actuating mechanism switching value and 4-20mA analog quantity communication function, support the Modbus communication of redundancy, and support relay function, combination in any can be carried out to Analog control signal and loop redundancy control signal, typical case is set to: control section is realized by traditional analog amount, and information feed back and fault diagnosis etc. are realized by loop redundancy control signal.The same with original field bus type intelligent electric actuating mechanism, the utility model can set whole parameters by Infrared remote controller, as control mode, output alarm switching configuration, contact are arranged, also carries out remote monitoring and setting by fieldbus.In addition, loop the technique on redundant control is the control technology of DCS system maturation, is convenient to design the loop redundancy control system with high reliability.
Claims (3)
1. the intelligent electric of a support loop Redundant Control controls executive system, the driving circuit comprising master control micro-control unit and be connected with master control micro-control unit, signal processing circuit and electronic moment testing circuit, it is characterized in that: also comprise auxiliary micro-control unit, man-machine display interface, position transmitter, Modbus loop redundancy communication card, power module are connected with auxiliary micro-control unit respectively with low-power consumption treatment circuit; Connected by RS-232 between described master control micro-control unit and auxiliary micro-control unit.
2. the intelligent electric of support loop Redundant Control controls executive system according to claim 1, it is characterized in that: described auxiliary micro-control unit selects PIC18F87K90, be with two enhancement mode USART serial communication modules, one piece of Modbus loop redundancy communication card can be connect.
3. the intelligent electric of support loop Redundant Control controls executive system according to claim 2, it is characterized in that: the micro-control unit of described Modbus loop redundancy communication card selects PIC18F25K22, be with two enhancement mode USART serial communication modules, and support relay function.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111903028A (en) * | 2018-03-16 | 2020-11-06 | 孔斯贝格海运公司 | Redundant power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111903028A (en) * | 2018-03-16 | 2020-11-06 | 孔斯贝格海运公司 | Redundant power supply system |
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