Linkage control method, device and system based on heterogeneous communication of DCS (Distributed Control System) and PLC (Programmable Logic Controller)

Abstract

The invention provides a linkage control method, device and system based on heterogeneous communication of a DCS (Distributed Control System) and a PLC (Programmable Logic Controller). The method comprises the following steps: establishing heterogeneous communication connection between the DCS and the PLC: the DCS is connected with a first field device / valve endpoint, and the PLC is connected with a second field device / valve; establishing communication connection between the DCS and the intelligent server; the DCS obtains real-time operation data of field equipment / valves (including a first field equipment / valve and a second field equipment / valve) and sends the real-time operation data to the intelligent server, and the intelligent server is used for analyzing the real-time operation data according to trademark data, obtaining an optimal operation parameter adjustment strategy of an end point of the field equipment / valve and sending the optimal operation parameter adjustment strategy to the DCS; the DCS sends the received optimal operation parameter adjustment strategy to the PLC; and the DCS and the PLC cooperatively control the field equipment / valve according to the optimal operation parameter adjustment strategy, so that the problem that the DCS and the PLC cannot cooperate in real time in the prior art is solved, and the control of dynamic trademark data is realized.

Description

Technical Field

[0001] The present invention relates to the field of automatic control technology in industrial production, and in particular to a linkage control method, device and system based on heterogeneous communication between DCS and PLC. Background Art

[0002] With the continuous development of factory production scale, the application of automation systems is increasing. The heterogeneous communication and linkage control between its core main control system and existing remote peripheral equipment has become an important factor restricting the improvement of production efficiency.

[0003] Nowadays, it is common for large and medium-sized industrial enterprises to use multiple brands of DCS (Distributed Control System) and PLC (Programmable Logic Controller) products. Due to market competition and other factors, the systems developed by various DCS and PLC manufacturers in the past were often isolated technology islands with no or very poor openness, and it was extremely difficult for them to communicate with each other through the Internet. This situation has brought great difficulties to the autonomous operation, data collection, and linkage control of production equipment.

[0004] To this end, the existing technology has proposed a solution for communication and control between DCS and PLC, but the existing technology mainly focuses on simple communication and program control, and does not consider the problem of DCS and PLC linkage and collaborative control under various working conditions of different brands when applying to chemical production lines. Summary of the invention

[0005] The technical problem to be solved by the present application is that it is difficult for DCS and PLC to coordinate control under different working conditions of different brands, and a linkage control method, device and system based on heterogeneous communication between DCS and PLC are provided.

[0006] In a first aspect, the technical solution of the present application provides a linkage control method based on heterogeneous communication between DCS and PLC, comprising:

[0007] Establishing a heterogeneous communication connection between a DCS and a PLC, wherein: the DCS is connected to a first field device / valve endpoint, and the PLC is connected to a second field device / valve;

[0008] Establish a communication connection between the DCS and the intelligent server; the DCS obtains the operation data of the first field device / valve in real time and receives the operation data of the second field device / valve fed back by the PLC in real time, summarizes the real-time operation data, and sends the real-time operation data to the intelligent server; the intelligent server is used to analyze the real-time operation data according to the brand data, obtain the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve, and send it to the DCS;

[0009] The DCS sends the received optimal operating parameter adjustment strategy of the second field device / valve to the PLC;

[0010] The DCS and the PLC collaboratively control the field equipment / valve according to the optimal operating parameter adjustment strategy, including: the DCS controls the first field equipment / valve according to the optimal operating parameter adjustment strategy of the first field equipment / valve; the PLC controls the second field equipment / valve according to the optimal operating parameter adjustment strategy of the second field equipment / valve.

[0011] The linkage control method based on heterogeneous communication between DCS and PLC described in some solutions also includes:

[0012] The DCS receives the authorization information and controls the operation of the start / stop / load adjustment program of the process corresponding to the preset brand data according to the authorization information.

[0013] The linkage control method based on heterogeneous communication between DCS and PLC described in some solutions also includes:

[0014] The DCS receives the execution result of the optimal operating parameter adjustment strategy of the first field device / valve pair and the execution result of the optimal operating parameter adjustment strategy of the second field device / valve pair fed back by the PLC.

[0015] In some schemes, the linkage control method based on heterogeneous communication between DCS and PLC is described, wherein the intelligent server is used to analyze the real-time operation data according to the brand data, obtain the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve, and send it to the DCS:

[0016] The intelligent server reads the preset values ​​of process requirements and historical production data corresponding to the brand data pre-stored in the database, and compares the real-time operation data with the preset values, and obtains the optimal operating parameter adjustment strategy for the first field equipment / valve and the second field equipment / valve in combination with the historical production data and the comparison result.

[0017] The linkage control method based on heterogeneous communication between DCS and PLC described in some solutions also includes:

[0018] The DCS receives the manually input adjusted brand data and provides the adjusted brand data to the intelligent server.

[0019] In a second aspect, the technical solution of the present application provides a linkage control device based on heterogeneous communication between DCS and PLC, comprising at least one processor and at least one memory, at least one of the memories storing program information, and at least one of the processors reading the program information executes the linkage control method based on heterogeneous communication between DCS and PLC as described in any one of the first aspects.

[0020] In a third aspect, the technical solution of the present application provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the linkage control method based on heterogeneous communication between DCS and PLC as described in any one of the first aspects.

[0021] In a fourth aspect, the technical solution of the present application provides a computer-readable storage medium, in which program information is stored. After the computer reads the program information, the computer executes the linkage control method based on heterogeneous communication between DCS and PLC as described in any one of the first aspects.

[0022] In a fifth aspect, the technical solution of the present application provides a linkage control system based on heterogeneous communication between DCS and PLC, including DCS, PLC and intelligent server, wherein:

[0023] A master control program is set in the DCS to control the first field device / valve according to the brand data and send a control command to the PLC; a slave control program is set in the PLC to control the second field device / valve according to the control command;

[0024] The DCS receives the operation data sent by the first field device / valve and the operation data of the second field device / valve fed back by the PLC, summarizes them to obtain real-time operation data, and sends the brand data and the real-time operation data to the intelligent server;

[0025] The intelligent server analyzes the real-time operation data according to the brand data, obtains the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve and sends it to the DCS;

[0026] The DCS sends the received optimal operating parameter adjustment strategy of the second field device / valve to the PLC; the DCS controls the first field device / valve according to the optimal operating parameter adjustment strategy of the first field device / valve;

[0027] The PLC adjusts the strategy to control the second field device / valve according to the optimal operating parameter of the second field device / valve.

[0028] The linkage control system based on heterogeneous communication between DCS and PLC described in some solutions also includes:

[0029] A database connected to the intelligent server for storing preset process requirements and historical production data corresponding to all grade data;

[0030] The intelligent server reads the process requirement preset values ​​and historical production data corresponding to the brand data from the database and then analyzes the real-time operation data.

[0031] Compared with the prior art, the above technical solution provided by the present invention has at least the following effects:

[0032] The linkage control method, device and system based on heterogeneous communication between DCS and PLC provided by the present invention establish a heterogeneous communication connection between DCS and PLC: DCS is connected to a first field device / valve endpoint, and PLC is connected to a second field device / valve; a communication connection between DCS and an intelligent server is established; DCS obtains real-time operation data of field devices / valves (including first field devices / valves and second field devices / valves) and sends it to the intelligent server, and the intelligent server is used to analyze the real-time operation data according to the brand data, obtain the optimal operation parameter adjustment strategy of the field device / valve endpoint and send it to DCS; DCS sends the received optimal operation parameter adjustment strategy to PLC; DCS and PLC cooperate to control the field device / valves according to the optimal operation parameter adjustment strategy, thereby overcoming the problem that DCS and PLC in the prior art cannot cooperate in real time and realizing the control of dynamic brand data. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of a linkage control method based on heterogeneous communication between DCS and PLC according to an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the hardware connection relationship of a linkage control device based on heterogeneous communication between DCS and PLC according to an embodiment of the present invention;

[0035] Figure 3 A structural block diagram of a linkage control system based on heterogeneous communication between DCS and PLC according to an embodiment of the present invention;

[0036] Figure 4 The figure is a schematic diagram of the control process of a linkage control system based on heterogeneous communication between DCS and PLC according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The specific implementation of the present application is further described below with reference to the accompanying drawings.

[0038] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the application.

[0039] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0040] At present, in the fields of chemical plants, fine chemical plants and manufacturing production lines (hereinafter referred to as plants), the integrated dynamic management and control of on-site PLC and central control room DCS has always been a major difficulty. Since PLC and DCS mostly use communication-only mode, the plant site relies on manual operation, which often leads to a large workload in terms of start-up and shutdown, daily operation and abnormal handling (hereinafter referred to as working conditions). In serious cases, production accidents may occur due to omissions or misoperation. Furthermore, since PLC and DCS only have a communication relationship and there is no reliable heterogeneous communication and control method, the data of the process end brand cannot be dynamically used for automatic control of working conditions such as start-up and shutdown, daily operation and abnormal handling.

[0041] The solution in the embodiment of the present invention is based on the actual working conditions at the process end, and provides a linkage control solution based on heterogeneous communication between DCS and PLC. By collecting preset brand data and real-time production data, the intelligent server analyzes and monitors risks, establishes a DCS and PLC heterogeneous communication architecture, develops an automatic control solution on the DCS side, and operates the valves, equipment and control loops on the DCS and PLC sides in a linkage manner, ultimately realizing the execution of each brand data and the control and protection under various working conditions.

[0042] The embodiment of the present invention provides a linkage control method based on heterogeneous communication between DCS and PLC, which is applied to the control system of chemical equipment, fine chemical equipment and manufacturing production line, such as Figure 1 As shown, the method includes:

[0043] S10: Establishing a heterogeneous communication connection between the DCS and the PLC, wherein: the DCS is connected to a first field device / valve endpoint, and the PLC is connected to a second field device / valve.

[0044] After the heterogeneous communication connection between DCS and PLC is successfully established, the DCS side can read and control the second field device / valve on the PLC side (as shown in the figure, DCS and PLC can control different field devices / valves respectively, and the field device / valve controlled by DCS is defined as the first field device / valve, and the field device / valve controlled by PLC is defined as the second field device / valve). And according to the brand data, the DCS side can send a preset data packet to the PLC side through the main program control, activate the brand slave program on the PLC side to adjust the control state of the second field device / valve in the communication, automatically prepare for the field adjustment of different brands and different working conditions, and feed back the execution results of the second field device / valve to the DCS. The DCS itself can directly obtain the execution results of the first field device / valve controlled by the DCS, so that the DCS can obtain the operating data of all field devices / valves, and thus obtain real-time operating data.

[0045] Heterogeneous communication can be implemented using conventional industrial communication methods, and the data packet can be in the following format: PLC bit number + data header + 32-bit brand data + 128-bit control command + register address + data tail + check bit; the DCS side main program sends a data packet of control command according to this format to notify the PLC to prepare. After receiving the data packet, the PLC will feedback the received instruction, fault code and other related information.

[0046] S20: Establish a communication connection between the DCS and the intelligent server; the DCS obtains the operating data of the first field device / valve in real time and receives the operating data of the second field device / valve fed back by the PLC in real time, summarizes the real-time operating data, and sends the real-time operating data to the intelligent server; the intelligent server is used to analyze the real-time operating data according to the brand data, obtain the optimal operating parameter adjustment strategy of the first field device / valve and the second field device / valve, and send it to the DCS.

[0047] The operation of the intelligent server can be realized based on intelligent models such as Transformer neural network development, or based on other big data training models. Through the historical operation of relevant brand data, learning and training, it can determine the optimal operating parameters corresponding to any real-time operation data. The optimal operating parameter adjustment strategy includes the control parameter adjustment strategy of the first field equipment / valve and the second field equipment / valve, which may include the sequence and control parameters of valve and equipment operation.

[0048] S30: The DCS sends the received optimal operating parameter adjustment strategy of the second field device / valve to the PLC.

[0049] As a result, both the DCS and PLC obtain the optimal operating parameter adjustment strategy for the field devices / valves they control accordingly.

[0050] S40: The DCS and the PLC cooperatively control the field device / valve according to the optimal operating parameter adjustment strategy, including: the DCS controls the first field device / valve according to the optimal operating parameter adjustment strategy of the first field device / valve; the PLC controls the second field device / valve according to the optimal operating parameter adjustment strategy of the second field device / valve.

[0051] DCS and PLC can execute in sequence according to the valve and equipment operation sequence and control parameters recommended in the optimal operating parameter adjustment strategy. DCS controls and PLC controls the second field equipment / valve, thereby realizing linkage control and completing the established production tasks.

[0052] The above scheme of the present embodiment establishes a heterogeneous communication relationship between DCS and PLC, makes intelligent analysis and decision updates based on brand data and real-time operation data of the production process, applies DCS and PLC bilateral linkage and collaborative control, coordinates the operation status of multiple terminals such as DCS, PLC, field equipment / valves, and intelligent servers, and finally realizes the execution of various brand data and the control and protection under various working conditions, realizes the established production tasks, overcomes the problem of DCS and PLC being unable to collaborate in real time in the prior art, and realizes the control of dynamic brand data.

[0053] Furthermore, the linkage control method based on heterogeneous communication between DCS and PLC also includes: DCS receives authorization information, and controls the action of the start / stop / load adjustment program of the process corresponding to the preset brand data according to the authorization information. In this step, the operator can select the working condition that needs to be executed at present according to production needs and input authorization information, such as start / stop, load lifting, abnormal handling, etc. After the operator makes a selection on the DCS side, the master-slave executable programs on the DCS and PLC sides jointly complete the established tasks. Through this solution, it can be ensured that the tasks meet actual needs and can be manually adjusted according to on-site production conditions.

[0054] Preferably, the linkage control method based on heterogeneous communication between DCS and PLC also includes: DCS receives the execution result of the optimal operating parameter adjustment strategy for the first field device / valve, and the execution result of the optimal operating parameter adjustment strategy for the second field device / valve fed back by PLC. That is, PLC feeds back command execution status, field process and equipment signal and other related information to DCS, and the specific data format can be determined according to the requirements of the heterogeneous communication architecture. Through this solution, the DCS side can act as the main control side to coordinate and dispatch PLC to control the second field device / valve, and can also obtain the operating data of the second field device / valve from the PLC side. DCS can master complete operating information of field equipment / valves.

[0055] In some schemes, the intelligent server is used to analyze the real-time operation data according to the brand data, obtain the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve and send it to the DCS: the intelligent server reads the process requirement preset value and historical production data corresponding to the brand data pre-stored in the database, and the intelligent server compares the real-time operation data with the preset value, and obtains the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve in combination with the historical production data and the comparison result. In specific implementation, a learning model can be set in the intelligent server, and the preset data, historical production data, etc. of various brand data are stored in the database. The learning model retrieves the preset data and historical production data recorded in the database for learning and training, so as to determine how to optimize the adjustment and control of the equipment / valve under any real-time operation data, and give the optimal operation parameters, automatically update the dynamic brand adjustable data, so as to intelligently generate the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve. After the optimal operating parameter adjustment strategy is sent to the DCS, the DCS can update the main program. After the main program is updated, the corresponding control commands will also be updated, that is, the control commands sent to the PLC side are updated, and then the slave program on the PLC side is updated, so that both the DCS side and the PLC side can control the field equipment / valves according to the latest optimal operating parameter adjustment strategy.

[0056] The linkage control method based on heterogeneous communication between DCS and PLC in some schemes also includes: DCS receives the adjusted brand data input manually, and provides the adjusted brand data to the intelligent server. In this scheme, the process personnel can provide the adjusted brand data to DCS. For example, if the brand data initially input is wrong and needs to be changed and adjusted, the adjusted brand data can be input manually at this time. The DCS can configure an interface for manual input of information. According to the adjusted brand data, the DCS side start-stop main program sends a preset data packet to the PLC side slave program, activates the PLC side brand slave program to adjust the control state of the on-site point, and automatically presets parameters for different brands and different working conditions; the main program runs the sequential control program, executes the DCS side action at different steps, sends command instructions to the PLC side (PLC executes the PLC side action), and finally completes the start-stop task. Through this application, it is possible to ensure the accuracy of the brand data and ensure the accurate execution of the task.

[0057] The embodiment of the present invention also provides a linkage control device based on heterogeneous communication between DCS and PLC, such as Figure 2As shown, the electronic device includes at least one processor 21 and at least one memory 22, at least one of the memories 22 stores program information, and at least one of the processors 21 reads the program information and executes the linkage control method based on heterogeneous communication between DCS and PLC described in any of the above method embodiments. The device may also include: an input device 23 and an output device 24. The processor 21, the memory 22, the input device 23 and the output device 24 can be connected in communication. The memory 22, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The processor 21 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 22, that is, the linkage control method based on heterogeneous communication between DCS and PLC provided by any of the above schemes is realized. The memory 22 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created according to the use of the linkage control method based on heterogeneous communication between DCS and PLC, etc. In addition, the memory 22 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 22 may optionally include a memory remotely arranged relative to the processor 21, and these remote memories may be connected to a device for executing a linkage control method based on heterogeneous communication between DCS and PLC through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The input device 23 may receive input user clicks, and generate signal inputs related to user settings and function control of the linkage control method based on heterogeneous communication between DCS and PLC. The output device 24 may include a display device such as a display screen. When the one or more modules are stored in the memory 22, when they are run by the one or more processors 21, the linkage control method based on heterogeneous communication between DCS and PLC in any of the above-mentioned method embodiments is executed.

[0058] An embodiment of the present invention further provides a computer program product, including a computer program / instruction, characterized in that when the computer program / instruction is executed by a processor, the linkage control method based on heterogeneous communication between DCS and PLC described in any of the above embodiments is implemented.

[0059] The embodiment of the present invention further provides a computer-readable storage medium, characterized in that the storage medium stores program information, and after the computer reads the program information, it executes the linkage control method based on heterogeneous communication between DCS and PLC described in any one of the above embodiments.

[0060] The embodiment of the present invention also provides a linkage control system based on heterogeneous communication between DCS and PLC, such as Figure 3 As shown, it includes a DCS, a PLC and an intelligent server, wherein a main control program is set in the DCS, and controls the first field device / valve according to the brand data and sends a control command to the PLC; a slave control program is set in the PLC, and controls the second field device / valve according to the control command; the DCS receives the operation data sent by the first field device / valve and the operation data of the second field device / valve fed back by the PLC, summarizes to obtain real-time operation data, and sends the brand data and the real-time operation data to the intelligent server; the intelligent server analyzes the real-time operation data according to the brand data, obtains the optimal operating parameter adjustment strategy of the first field device / valve and the second field device / valve and sends it to the DCS; the DCS sends the received optimal operating parameter adjustment strategy of the second field device / valve to the PLC; the DCS controls the first field device / valve according to the optimal operating parameter adjustment strategy of the first field device / valve; the PLC controls the second field device / valve according to the optimal operating parameter adjustment strategy of the second field device / valve.

[0061] In the system provided by this solution, DCS and PLC establish heterogeneous communication connection, that is, DCS can send control commands to PLC to realize DCS and PLC collaborative control of field equipment / valves, and DCS can also receive real-time operation data of second field equipment / valves fed back by PLC. The intelligent server is used to analyze the operating conditions corresponding to the brand data, obtain the optimal operating parameter adjustment strategy and feed it back to DCS. DCS sends the optimal operating parameter adjustment strategy of the second field equipment / valve to PLC, and operates the field equipment / valves on the DCS and PLC sides in a coordinated manner, finally realizing the execution of each brand data and the control and protection under various working conditions, realizing real-time collaborative control of DCS and PLC and control of dynamic brand data.

[0062] Furthermore, if Figure 3As shown, the system also includes a database that is connected to the intelligent server in communication, and the database is used to store the process requirement preset values ​​and historical production data corresponding to all the brand data; the intelligent server reads the process requirement preset values ​​and historical production data corresponding to the brand data from the database and analyzes the real-time operation data. Among them, (1) represents the control command sent by the DCS to the PLC; (2) represents the command execution status fed back by the PLC, the process and equipment signals of the second field equipment / valve; (3) represents the control command sent by the DCS to the first field equipment / valve; (4) represents the command execution status, field process and equipment signals fed back by the first field equipment / valve; (5) represents the brand data fed back by the DCS to the intelligent server and the real-time operation data of the field equipment / valve; (6) represents the optimal operation parameter adjustment suggestions output by the intelligent server to the DCS; (7) represents the database writing process; (8) represents the database reading process; (9) represents the operator authorization process.

[0063] like Figure 4 As shown, after the intelligent server obtains the brand data and the real-time operation data, it analyzes the real-time operation data according to the brand data to obtain the optimal operation parameter adjustment strategy of the field equipment / valve (including the first field equipment / valve and the second field data / valve). After the DCS side obtains the authorization data (including manually clicking the authorization operation on the DCS), it implements the start / stop / load adjustment program and other operations according to the brand data, calls the control command main program, and the main program controls the first field equipment / valve to execute the control command. The first field equipment / valve sends the execution result to the DCS for the DCS to monitor and complete the main program command. The DCS sends the corresponding control command to the PLC, and the PLC side calls the control command slave program, and the slave program controls the second field equipment / valve to execute the control command. The second field equipment / valve sends the execution result to the PLC, and the PLC sends it to the DCS. Both the PLC and the DCS can monitor and complete the slave program command.

[0064] Reference below Figure 3 and Figure 4 , further illustrating the specific implementation process of using the above system provided in this embodiment to apply to the start and stop process of the RO membrane device.

[0065] In the current start-up and shutdown process control of a certain RO membrane device, 60% of the operations in the start-up and shutdown process are performed on the on-site PLC, and 40% of the operations are performed on the DCS side. The PLC only establishes a communication relationship with the DCS. The on-site parameters of the PLC can be remotely transmitted to the DCS for display, but the specific control actions still need to be adjusted by on-site personnel; the current start-up and shutdown involves dynamic operations at more than 50 points. The general process is that the internal operator adjusts the relevant circuits and equipment on the DCS side, and the external operator constantly runs between the various PLCs on site to adjust the on-site equipment. The internal and external operators communicate with each other through walkie-talkies. The production efficiency is low, and because the control barriers between the central control and the site are not broken, it is easy to make adjustments on site, the control program on the DCS side cannot control the overall situation, and the product quality is affected.

[0066] After adopting the above solution provided by the present invention:

[0067] (1) The DCS and PLC of the RO membrane device establish heterogeneous information communication. The current state where only the relevant parameters on the PLC side can be viewed through the DCS side is changed to the DCS side being able to read and control the second field device / valve on the PLC side, thus establishing a heterogeneous communication relationship.

[0068] (2) The dynamic brand intelligent server classifies the variables input by different brands according to process requirements, dynamically compares the corresponding preset values, real-time production values, and historical production databases, analyzes the mechanism relationship, gives optimal operating parameter adjustment suggestions, and updates them to the main program.

[0069] (3) Receive dynamic brand data from process personnel, and based on the dynamic brand data, the DCS side start-stop main program sends a preset data packet to the PLC side slave program, activates the PLC side brand slave program to adjust the control status of the on-site equipment / valves, and automatically presets parameters for different brands and different working conditions; the main program runs the sequential control program, executes DCS side actions at different steps, sends command instructions to the PLC (PLC executes PLC side actions), DCS controls the first on-site equipment / valve action, PLC controls the second on-site equipment / valve action, and the master-slave program coordinates and links to control all on-site equipment / valves, and finally completes the start-stop task.

[0070] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0071] The above are only the principles and preferred embodiments of the present application. It should be noted that, for ordinary technicians in this field, on the basis of the principles of the present application, several other modifications can be made, which should also be considered as the protection scope of the present application.

Claims

1. A linkage control method based on heterogeneous communication between DCS and PLC, characterized in that: include: Establishing a heterogeneous communication connection between a DCS and a PLC, wherein: the DCS is connected to a first field device / valve endpoint, and the PLC is connected to a second field device / valve; Establish a communication connection between the DCS and the intelligent server; the DCS obtains the operation data of the first field device / valve in real time and receives the operation data of the second field device / valve fed back by the PLC in real time, summarizes the real-time operation data, and sends the real-time operation data to the intelligent server; the intelligent server is used to analyze the real-time operation data according to the brand data, obtain the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve, and send it to the DCS; The DCS sends the received optimal operating parameter adjustment strategy of the second field device / valve to the PLC; The DCS and the PLC collaboratively control the field equipment / valve according to the optimal operating parameter adjustment strategy, including: the DCS controls the first field equipment / valve according to the optimal operating parameter adjustment strategy of the first field equipment / valve; the PLC controls the second field equipment / valve according to the optimal operating parameter adjustment strategy of the second field equipment / valve.

2. The linkage control method based on heterogeneous communication between DCS and PLC according to claim 1 is characterized in that: Also includes: The DCS receives the authorization information and controls the operation of the start / stop / load adjustment program of the process corresponding to the brand data according to the authorization information.

3. The linkage control method based on heterogeneous communication between DCS and PLC according to claim 1 is characterized in that: Also includes: The DCS receives the execution result of the optimal operating parameter adjustment strategy of the first field device / valve pair and the execution result of the optimal operating parameter adjustment strategy of the second field device / valve pair fed back by the PLC.

4. The linkage control method based on heterogeneous communication between DCS and PLC according to any one of claims 1 to 3, characterized in that: The intelligent server is used to analyze the real-time operation data according to the brand data, obtain the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve, and send it to the DCS: The intelligent server reads the preset values ​​of process requirements and historical production data corresponding to the brand data pre-stored in the database, and compares the real-time operation data with the preset values, and obtains the optimal operating parameter adjustment strategy for the first field equipment / valve and the second field equipment / valve in combination with the historical production data and the comparison result.

5. The linkage control method based on heterogeneous communication between DCS and PLC according to claim 4 is characterized in that: Also includes: The DCS receives the manually input adjusted brand data and provides the adjusted brand data to the intelligent server.

6. A linkage control device based on heterogeneous communication between DCS and PLC, characterized in that: It comprises at least one processor and at least one memory, at least one of the memories stores program information, and at least one of the processors reads the program information and executes the linkage control method based on heterogeneous communication between DCS and PLC as described in any one of claims 1 to 5.

7. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the linkage control method based on heterogeneous communication between DCS and PLC as described in any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, characterized in that: The storage medium stores program information, and after the computer reads the program information, it executes the linkage control method based on heterogeneous communication between DCS and PLC as described in any one of claims 1 to 5.

9. A linkage control system based on heterogeneous communication between DCS and PLC, characterized in that: Including DCS, PLC and intelligent server, including: A master control program is set in the DCS to control the first field device / valve according to the brand data and send a control command to the PLC; a slave control program is set in the PLC to control the second field device / valve according to the control command; The DCS receives the operation data sent by the first field device / valve and the operation data of the second field device / valve fed back by the PLC, summarizes them to obtain real-time operation data, and sends the brand data and the real-time operation data to the intelligent server; The intelligent server analyzes the real-time operation data according to the brand data, obtains the optimal operation parameter adjustment strategy of the first field device / valve and the second field device / valve and sends it to the DCS; The DCS sends the received optimal operating parameter adjustment strategy of the second field device / valve to the PLC; the DCS controls the first field device / valve according to the optimal operating parameter adjustment strategy of the first field device / valve; The PLC adjusts the strategy to control the second field device / valve according to the optimal operating parameter of the second field device / valve.

10. The linkage control system based on heterogeneous communication between DCS and PLC according to claim 9, characterized in that: Also includes: A database connected to the intelligent server for storing preset process requirements and historical production data corresponding to all grade data; The intelligent server reads the process requirement preset values ​​and historical production data corresponding to the brand data from the database and then analyzes the real-time operation data.

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