CN112346397A - Simulation method of distributed control system, distributed processing unit and distributed control system - Google Patents
Simulation method of distributed control system, distributed processing unit and distributed control system Download PDFInfo
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- CN112346397A CN112346397A CN201910728473.6A CN201910728473A CN112346397A CN 112346397 A CN112346397 A CN 112346397A CN 201910728473 A CN201910728473 A CN 201910728473A CN 112346397 A CN112346397 A CN 112346397A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- 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
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1105—I-O
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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]
Abstract
The simulation method of the distributed control system specifically comprises the following steps: a plurality of clamping pieces are added in the decentralized processing unit to serve as simulation clamping pieces, logic is generated in the logic controller, and the simulation clamping pieces can achieve simulation functions, wherein the simulation functions comprise field device simulation and corresponding technological process simulation. And connecting the signal of each simulation card and the corresponding basic card for realizing the control and monitoring functions. Simulation of the decentralized control system is achieved by means of an operator station. The simulation method of the distributed control system provided by the invention can simulate the field equipment and the process with lower use cost. The invention also relates to a corresponding decentralized processing unit and a decentralized control system.
Description
Technical Field
The present invention relates to a simulation method, and more particularly, to a simulation method for a distributed control system, and a distributed processing unit and a distributed control system using the simulation method.
Background
A Distributed Control System (DCS) is widely used in industrial Control. In order to improve the operation and maintenance level of the operator, the DCS generally incorporates a simulation function to train the operator. Existing DCS generally employ physical simulation or otherwise configure a simulation system to implement the simulation function. The physical simulation can only be simulated to the level of field equipment generally, and the simulation of the process cannot be realized, and the additional simulation system can increase the use cost.
Disclosure of Invention
The invention aims to provide a simulation method of a distributed control system, which can simulate field equipment and a technological process at lower cost.
It is another object of the present invention to provide a decentralized processing unit of a decentralized control system, which enables the decentralized control system to simultaneously implement control and monitoring functions, as well as simulation functions for field devices and processes, at a lower cost.
It is a further object of the present invention to provide a decentralized control system which enables both control and monitoring functions, as well as simulation of field devices and processes, at a lower cost.
The invention provides a simulation method of a distributed control system, which specifically comprises the following steps:
adding a plurality of clamping pieces as simulation clamping pieces in the decentralized processing unit, and generating logic in the logic controller to enable the simulation clamping pieces to realize a simulation function, wherein the simulation function comprises the simulation of field equipment and the simulation of a corresponding technological process; connecting each simulation card piece and a corresponding basic card piece for realizing the control and monitoring functions by signals; simulation of the decentralized control system is achieved by means of an operator station.
According to the simulation method of the distributed control system, a plurality of clamping pieces are added in the same distributed processing unit, new logics are divided, the original clamping pieces and logics are used for achieving the original control and monitoring functions, and the added clamping pieces and logics are used for achieving simulation of field equipment and corresponding technological processes. And correspondingly connecting the two parts of the clamping pieces by signals, and feeding the simulated field equipment and the process back to an operator station to realize simulation. The simulation method of the distributed control system simultaneously realizes the functions of control and monitoring and the functions of field equipment and process simulation through the same original distributed processing unit, improves the training effect and reduces the use cost.
In an exemplary embodiment of the simulation method, the step of generating logic in the logic controller to enable the analog card to realize the analog function specifically includes: logic is generated in a logic controller of the decentralized processing unit to establish a field device mathematical model and a corresponding process model, and then the field device mathematical model and the process mathematical model are associated with the simulation card.
In an exemplary embodiment of the simulation method, the simulation method further comprises the steps of: and performing functional configuration on the simulation card to realize the simulation of field equipment and a technological process.
In an exemplary embodiment of the simulation method, the step of functionally configuring the simulation card specifically includes: and (4) carrying out functional configuration on the simulation card piece by using engineering design software at an engineer station.
In an exemplary embodiment of the simulation method, the steps of signal connection between each analog card and the corresponding basic card for implementing the control and monitoring functions are specifically as follows: the output end of the basic card is connected to the input end of the simulation card by a signal wire through a terminal board, and the input end of the basic card is connected to the output end of the simulation card.
The invention also provides a distributed processing unit which comprises a logic controller, a plurality of basic clamping pieces and a plurality of simulation clamping pieces. Logic for controlling and monitoring the field devices and the process, and for simulating the field devices and the process, is generated within the logic controller. The basic card is respectively in signal connection with the logic controller and can be controlled and monitored through the logic generated by the logic controller. The simulation card is respectively in signal connection with the logic controller, and can simulate the field device and the corresponding technological process through the logic generated by the logic controller. The plurality of analog cards are respectively in signal connection with the plurality of basic cards in a one-to-one correspondence manner.
The distributed processing unit provided by the invention divides the clamping pieces and the logic in the same distributed processing unit, wherein one part of the clamping pieces and the logic are used for realizing the functions of control and monitoring, and the other part of the clamping pieces and the logic are used for realizing the simulation of the field equipment and the corresponding technological process. The two parts of the clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be realized by feeding simulated field equipment and technological processes back to an operator station. The decentralized processing unit enables the decentralized control system to simultaneously realize the functions of control and monitoring, and the functions of field equipment and technological process simulation, so that the training effect is improved, and the use cost is reduced.
In an exemplary embodiment of the decentralized processing unit, the system further comprises a terminal block, and the analog cards are respectively connected with the corresponding basic cards through the terminal block.
The invention also provides a distributed control system which comprises an engineer station, at least one operator station and a plurality of the distributed processing units. The decentralized processing unit, the engineer station and the operator station communicate via an industrial data bus.
According to the distributed control system provided by the invention, the clamping pieces and the logic are divided in each distributed processing unit, part of the clamping pieces and the logic are used for realizing the functions of control and monitoring, and the other part of the clamping pieces and the logic are used for realizing the simulation of the field equipment and the corresponding technological process. The two parts of the clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be realized by feeding simulated field equipment and technological processes back to an operator station. The distributed control system simultaneously realizes the functions of control and monitoring and the functions of field equipment and process simulation, improves the training effect and reduces the use cost.
In an exemplary embodiment of the decentralized control system, one of the decentralized processing units is a steam turbine digital electrohydraulic control system control cabinet.
In one exemplary embodiment of the decentralized control system, the industrial data bus is a field bus.
The above features, technical features, advantages and implementations of the simulation method of the distributed control system, the distributed processing unit and the distributed control system will be further described in the following description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. In the drawings, similar components or features may have the same reference numerals. Wherein the content of the first and second substances,
fig. 1 is a schematic diagram for explaining a configuration of a distributed control system.
FIG. 2 is a flow diagram illustrating one exemplary embodiment of a simulation method for a decentralized control system.
Reference numerals
100 decentralized processing unit
200 operator station
300 engineer station
400 industrial data bus
10 logic controller
20 basic fastener
30 simulation card
40 terminal block
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
Fig. 1 is a schematic diagram for explaining a configuration of a distributed control system, and referring to fig. 1, the distributed control system generally includes an engineer station 300, an operator station 200, and a distributed processing unit 100. The decentralized processing unit 100 can control and monitor the field device through a logic matching card preset in the logic controller. The engineer station 300 is capable of configuring the decentralized processing unit 100 and generating a human machine interface. The operator station 200 is capable of operating the field devices via the human machine interface and monitoring the status of the field devices and the process.
Fig. 2 is a flow chart for explaining an exemplary embodiment of a simulation method of a distributed control system, and referring to fig. 2, the simulation method of the distributed control system specifically includes the following steps:
and step S10, adding a plurality of cards as simulation cards in the decentralized processing unit, and generating logic in the logic controller to enable the simulation cards to realize simulation functions, wherein the simulation functions comprise field device simulation and corresponding technological process simulation.
Before step S10, the distributed processing unit has been configured to implement the control and monitoring functions, the logic controller thereof has previously generated the logic to implement the control and monitoring functions, and as shown in the left-side dashed box in the distributed processing unit 100 of fig. 1, the card for implementing the control and monitoring functions has also been mounted and configured. As shown in the dashed box on the right side of the distributed processing unit 100 in fig. 1, step S10 is to add a simulation clip in the cabinet of the existing distributed processing unit 100 and add new logic to the logic controller, so as to utilize the existing configuration to the maximum extent. In a conventional Logic Controller, for example, a Programmable Logic Controller (PLC), Logic editing is generally performed by a memory in combination with program programming. And generating new logic, namely storing the characteristics of the field equipment and the technical process in a memory of the logic controller in a data form, and programming a program of the logic controller to realize logic call of the data containing the characteristics of the field equipment and the technical process in the memory.
Step S20: and functionally configuring the simulation clamping piece to realize the simulation of field equipment and a technological process. In step S10, the simulation card simulates the field device and the process by receiving or transmitting signals, which have the same data characteristics as the signals of the real device and process. However, in the two signals, the corresponding signals may not be equal in value. The functional configuration in step S20 is based on the same data characteristics, and engineering design software is used at the engineer station to generate a comparison relationship between the signal received or sent by the analog card and the signal of the real device and process flow, so that the signal received or sent by the analog card can be connected with the original human-computer interface in the distributed control system. For example, the operator station 200 may be operated to transmit actual control signals corresponding to the field devices, and after conversion, the corresponding analog cards may receive analog control signals having the same data characteristics but different values. The simulated feedback signal corresponding to the simulated process is sent by the simulated cartridge and, after conversion, the real feedback signal having the same data characteristics is received at the operator station 200. Thereby realizing the real simulation of the field device and the technological process. However, in the case where the signal value received or transmitted by the analog card is equal to the signal value of the real equipment and process flow, step S20 may be omitted.
Step S30: and connecting the signal of each simulation card and the corresponding basic card for realizing the control and monitoring functions. The method specifically comprises the following steps: the output end of the basic card is connected to the input end of the simulation card by a signal wire through a terminal board, and the input end of the basic card is connected to the output end of the simulation card. Because the basic card and the simulation card are arranged in the same decentralized processing unit, the basic card and the simulation card can be connected in the simplest and most flexible mode, and the material cost can be saved to the greatest extent.
Step S40: simulation of the decentralized control system is achieved by means of an operator station. As the engineer station configures the decentralized processing unit to realize the functions of control and monitoring and generate the human-computer interface. The operator station thus can continue to operate the simulated field device using the existing human-machine interface and monitor the simulated process without additional configuration.
In an exemplary embodiment, the step of generating logic in the logic controller in step S10 to enable the analog card to realize the analog function specifically includes: logic is generated in the logic controller of the decentralized processing unit to create a mathematical model of the field device and a corresponding mathematical model of the process. Specifically, data characteristics of the field device and the technological process are respectively stored in a memory of the logic controller in the form of function expressions, a program of the logic controller is programmed, and a corresponding logic relationship is established between the function expressions of the field device and the technological process. And then programming the program of the logic controller, distributing the field equipment mathematical model and the corresponding process mathematical model to the input and output ports of the simulation card, and realizing the association between the field equipment mathematical model and the process mathematical model with the simulation card.
The field device mathematical model is used to simulate a field device that is capable of receiving a control signal and simulating a resulting action, and then feeding back a simulated status signal corresponding to the action, such as a mathematical model of a valve that can be switched between open and closed by receiving an open or closed control signal, and then feeding back an open or closed status signal. A mathematical model of a process is used to simulate the process, which is typically influenced by the state of the field device, e.g., the amount of water in a tank, which is influenced by the state of a valve as a field device. The valve is opened to fill water into the water tank, the water amount in the water tank is increased, and the water amount in the water tank is kept unchanged when the valve is closed. The process mathematical model is associated with the field device mathematical model through the logic described above. The simulation card is used for receiving control signals by the field device mathematical model and sending feedback signals by the field device mathematical model and the process mathematical model through being associated with the field device mathematical model and the process mathematical model.
The simulation method of the distributed control system is characterized in that a plurality of clamping pieces are added in the same distributed processing unit, new logics are divided, the original clamping pieces and logics are used for achieving the original control and monitoring functions, and the added clamping pieces and logics are used for achieving simulation of field equipment and corresponding technological processes. And correspondingly connecting the two parts of the clamping pieces by signals, and feeding the simulated field equipment and the process back to an operator station to realize simulation. The simulation method of the distributed control system simultaneously realizes the functions of control and monitoring and the functions of field equipment and process simulation through the same original distributed processing unit, improves the training effect and reduces the use cost.
The invention also provides a decentralized processing unit, which in an exemplary embodiment, with reference to fig. 1, comprises a logic controller 10, a plurality of base cartridges 20 (only one indicated in the figure), and a plurality of analog cartridges 30 (only one indicated in the figure). Logic controller 10 has logic generated therein for controlling and monitoring field devices and processes, as well as for simulating field devices and processes. The basic cards 20 are respectively connected with the logic controller 10 through signals, and can be controlled and monitored through the logic generated by the logic controller 10. The simulation cards 30 are respectively in signal connection with the logic controller 10, and can simulate the field devices and the corresponding processes through the logic generated by the logic controller 10. In the exemplary embodiment, the distributed processing unit further includes a terminal block 40, and the plurality of analog cards 30 are connected to the plurality of signal base cards 20 through the terminal block 40 in a one-to-one correspondence.
And the clamping pieces and the logic are divided in the same decentralized processing unit, part of the clamping pieces and the logic are used for realizing the functions of control and monitoring, and the other part of the clamping pieces and the logic are used for realizing the simulation of the field equipment and the corresponding technological process. The two parts of the clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be realized by feeding simulated field equipment and technological processes back to an operator station. The decentralized processing unit enables the decentralized control system to simultaneously realize the functions of control and monitoring, and the functions of field equipment and technological process simulation, so that the training effect is improved, and the use cost is reduced.
The present invention also provides a distributed control system, which comprises an engineer station 300, an operator station 200 and a plurality of the distributed processing units 100. In an exemplary embodiment, one of the decentralized processing units is a steam turbine digital electro-hydraulic control system control cabinet. The decentralized processing unit 100, the engineer station 300 and the operator station 200 communicate via a fieldbus. However, not limited thereto, in other exemplary embodiments, the distributed processing unit 100, the engineer station 300, and the operator station 200 may communicate via other industrial data buses, and the operator station 200 may be provided in plurality according to actual needs.
According to the distributed control system provided by the invention, the clamping pieces and the logic are divided in each distributed processing unit, part of the clamping pieces and the logic are used for realizing the functions of control and monitoring, and the other part of the clamping pieces and the logic are used for realizing the simulation of the field equipment and the corresponding technological process. The two parts of the clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be realized by feeding simulated field equipment and technological processes back to an operator station. The distributed control system simultaneously realizes the functions of control and monitoring and the functions of field equipment and process simulation, improves the training effect and reduces the use cost.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.
Claims (10)
1. The simulation method of the distributed control system is characterized by comprising the following steps of:
adding a plurality of clamping pieces as simulation clamping pieces in the decentralized processing unit, and generating logic in a logic controller to enable the simulation clamping pieces to realize simulation functions, wherein the simulation functions comprise field device simulation and corresponding technological process simulation;
connecting each simulation card piece and a corresponding basic card piece for realizing the control and monitoring functions by signals; and
simulation of the decentralized control system is achieved by means of an operator station.
2. The simulation method of claim 1, wherein the step of generating logic in the logic controller to enable the simulation card to realize the simulation function specifically comprises:
and generating logic in a logic controller of the decentralized processing unit to establish a field device mathematical model and a corresponding process mathematical model, and then associating the field device mathematical model and the process mathematical model with the simulation card.
3. The simulation method of claim 1, further comprising the steps of:
and functionally configuring the simulation clamping piece to realize the simulation of field equipment and a technological process.
4. The simulation method of claim 3, wherein the step of functionally configuring the analog card is specifically:
and carrying out functional configuration on the simulation card piece by using engineering design software at an engineer station.
5. The simulation method of claim 1, wherein the step of signal connection between each analog card and the corresponding basic card for implementing the control and monitoring functions comprises:
connecting the output end of the basic card to the input end of the simulation card by a signal wire through a terminal board, and connecting the input end of the basic card to the output end of the simulation card.
6. A decentralized processing unit, characterized by comprising:
a logic controller (10) having logic generated therein for controlling and monitoring the field devices and the process, and for simulating the field devices and the process;
the basic clamping pieces (20) are respectively in signal connection with the logic controller (10), and can be controlled and monitored through logic generated by the logic controller (10); and
the simulation cards (30) are respectively in signal connection with the logic controller (10), and can simulate field equipment and corresponding technological processes through logics generated by the logic controller (10); the plurality of simulation clamping pieces (30) are respectively in signal connection with the plurality of basic clamping pieces (20) in a one-to-one correspondence mode.
7. A dispersion treatment unit according to claim 6, further comprising a terminal block (40), said analog cards (30) being connected to said base cards (20) corresponding thereto through said terminal block, respectively.
8. A distributed control system, comprising
A station of engineers (300);
at least one operator station (200); and
a number of decentralized processing units (100) according to claim 6 or 7, the decentralized processing units (100), the engineer station (300) and the operator station (200) communicating via an industrial data bus (400).
9. A decentralized control system according to claim 8, wherein one of said decentralized processing units (100) is a steam turbine digital electro-hydraulic control system control cabinet.
10. A decentralized control system according to claim 9, wherein the industrial data bus (400) is a fieldbus.
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