Distributed DCS control device and method

Abstract

The invention relates to the technical field of distributed DCS control, in particular to distributed DCS control equipment and a distributed DCS control method. The distributed DCS control equipment comprises a controller group, a server cluster, a monitoring interaction terminal group and a ring network switch group, wherein the controller group comprises a plurality of DCS controllers; the server cluster comprises a plurality of servers; the monitoring interaction terminal group comprises a plurality of monitoring interaction terminals, the looped network switching unit comprises a plurality of switches, the controller group and the server cluster are respectively configured in corresponding independent space areas, and the controller group, the server cluster and the monitoring interaction terminal group are respectively and electrically connected with the looped network switching unit; and each DCS controller performs information interaction with the production operation subsystem of the target operation type through the corresponding switch in the ring network switch unit and independently controls the production operation subsystem. In order to ensure that the server at the data and application level does not fall off, the monitoring interaction terminal is flexible and changeable, and black screen monitoring and downtime monitoring are rejected.

Description

Technical Field

[0001] The present invention belongs to the technical field of distributed DCS control, and in particular relates to a distributed DCS control device and method. Background Art

[0002] The main task of the traditional metallurgical pelletizing automation control system is to collect metering data of the process production, monitor the equipment status and set the execution program according to the logical relationship of the process production. Specifically, through data display and recording, data setting and production operation, it performs continuous adjustment control and logical sequence control of the production process to achieve the purpose of monitoring and controlling the entire production process.

[0003] Specifically, the data collected by the upper computer of the metallurgical pelletizing automation control system is relatively simple and conservative. There are too many bottlenecks in the data collection of the third-party control system, and it is often necessary to convert the gateway protocol to open the data channel or use the OPC server to upload and send data. Usually, the control architecture adopts the HMI-Server-PLC method. The data exchange is relatively efficient and can handle large amounts of data and complex business logic, but this architecture has security drawbacks: in terms of security, the ecological environment of the server is extremely demanding, especially the redundant disaster resistance of the server data is crucial, and there must be no mistakes, otherwise the whole plant monitoring system will be down and directly affect production operations. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a distributed DCS control device and method.

[0005] In a first aspect, according to an embodiment of the present invention, there is provided a distributed DCS control device, comprising:

[0006] A controller group, including multiple DCS controllers;

[0007] Server clusters include multiple servers deployed in different independent spatial areas;

[0008] A monitoring interactive terminal group for monitoring the production status of distributed DCS control equipment, including multiple monitoring interactive terminals;

[0009] A ring network switch group, including multiple switches;

[0010] The controller group and the server cluster are respectively configured in corresponding independent space areas, and the controller group, the server cluster, and the monitoring interactive terminal group are respectively electrically connected to the ring network switch group;

[0011] Each DCS controller exchanges information with the production operation subsystem of the target operation type through the corresponding switch in the ring network switch group and independently controls the production operation subsystem. Each production operation subsystem is respectively configured in a corresponding independent space area, wherein each switch directly electrically connected to each production operation subsystem is independent of each other, and at least part of the monitoring interaction terminals in the monitoring interaction terminal group is configured in the independent space area where the corresponding production operation subsystem is located.

[0012] In some embodiments, the switches in the ring network switch group are configured in an independent space area where the controller group, the server cluster, and the production operation subsystem are located.

[0013] In certain embodiments, the production operation subsystem includes a pre-batch system, a batch mixing system, a dry grinding system, a pelletizing and roasting hot air system, and a screening system.

[0014] In some embodiments, each workshop where the pre-batch system, the batching and mixing system, the dry grinding system, the pelletizing and roasting hot air system, and the screening system are located is equipped with a plurality of switches.

[0015] In some embodiments, the controller group is configured in the instrument equipment room of the main control room. The instrument equipment room of the main control room is configured with a switch for general controller docking and five control units. Each control unit includes a switch and at least one DCS controller electrically connected to the switch. The switch for general controller docking is electrically connected to the DCS controllers in all control units, and the switch in each control unit is electrically connected to the switch in the corresponding production operation subsystem.

[0016] In some embodiments, the server cluster is distributed in a server room, which includes a first server room and a second server room with independent location areas. A switch module is configured in the server room, and the switch module includes two switch units. Each switch unit includes a core switch and an access switch. The servers in the first server room and the second server room are respectively connected to the corresponding access switches in the switch unit, and the core switch in the switch unit is electrically connected to the switch for general docking with the controller.

[0017] In some embodiments, the monitoring interactive terminal group includes: a thin terminal general docking switch and multiple thin terminals configured in the monitoring room of the main control room, and all thin terminals are electrically connected to the core server in the switch unit through the thin terminal general docking switch.

[0018] In a second aspect, according to an embodiment of the present invention, a distributed DCS control method is provided, which is applicable to the distributed DCS control device described in any one of the first aspects, and comprises the following steps:

[0019] Collecting real-time production data of each production operation subsystem through a monitoring interactive terminal that is part of the monitoring interactive terminal group;

[0020] Transmitting the real-time production data to a DCS controller in the controller group through a corresponding switch in the ring network switch group;

[0021] Through the corresponding switches in the ring network switch group, the server cluster receives, stores and processes the data from all DCS controllers, wherein the data of the DCS controllers includes the real-time production data and processing instructions derived from the real-time production data;

[0022] A part of the monitoring interactive terminal group is used to obtain real-time production data from the server cluster and display it, and output operation instructions to the DCS controller through the ring network switch group.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides security protection for real-time production data, ensures that servers at the data and application levels do not fail, monitors interactive terminals flexibly and changesably, and rejects black screen monitoring and downtime monitoring situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the scheme in the embodiment of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 FIG. 4 is a schematic diagram of the structure of a distributed DCS control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0028] At present, the data collected by the upper computer of the metallurgical pelletizing automation control system is relatively simple and conservative. There are too many bottlenecks in the data collection of the third-party control system, and it is often necessary to convert the gateway protocol to open the data channel or use the OPC server to upload and send data. Usually, the control architecture adopts the HMI-Server-PLC method. The data exchange is relatively efficient and can handle large amounts of data and complex business logic, but this architecture has security drawbacks: in terms of security, the ecological environment of the server is extremely demanding, especially the redundant disaster resistance of the server data is crucial, and there must be no mistakes, otherwise the whole plant monitoring system will be down and directly affect production operations.

[0029] In order to overcome the shortcomings of the above-mentioned metallurgical pelletizing automation control system technology, the present invention provides a distributed DCS control device and method, which can provide security for real-time production data, ensure that the servers at the data and application levels are not disconnected, and the monitoring interactive terminals are flexible and changeable, and black screen monitoring and downtime monitoring are rejected.

[0030] like Figure 1 As shown, in some embodiments, the present invention provides a distributed DCS control device, which includes: a controller group 10, a server cluster 20, a monitoring interactive terminal group 30 and a ring network switch group 40.

[0031] Among them, the controller group 10 includes multiple DCS controllers; in some embodiments, the controller group 10 is configured in the instrument equipment room of the main control room for centralized management, which is convenient for operation and maintenance personnel to centrally control the DCS controllers, check the monitoring operation status, etc. The instrument equipment room of the main control room is configured with a controller total docking switch 101 and five control units, each control unit includes a switch and at least one DCS controller electrically connected to the switch, the controller total docking switch 101 is electrically connected to the DCS controllers in all control units, and the switches in each control unit are electrically connected to the switches in the corresponding production operation subsystem.

[0032] In some embodiments, the five control monomers are a first control monomer 1011, a second control monomer 1012, a third control monomer 1013, a fourth control monomer 1014, and a fifth control monomer 1015, wherein the first control monomer 1011 includes a first DCS controller 10111 and a first switch 10112, the second control monomer 1012 includes two second DCS controllers 10121 and a second switch 10122, the third control monomer 1013 includes three third DCS controllers 10131 and a third switch 10132, and the fourth control monomer 1014 includes two fourth A DCS controller 10141 and a fourth switch 10142, and the fifth control unit 1015 includes a fifth DCS controller 10151 and a fifth switch 10152, wherein the models of the first DCS controller 10111, the second DCS controller 10121, the third DCS controller 10131, the fourth DCS controller 10141 and the fifth DCS controller 10151 can all be the same, and the models of the first switch 10112, the second switch 10122, the third switch 10132, the fourth switch 10142 and the fifth switch 10152 can all be the same.

[0033] The server cluster 20 includes multiple servers configured in different independent spatial areas; in some embodiments, the server cluster 20 is configured in a server room, the server room includes a first server room and a second server room with independent location areas, and a switch module 201 is configured in the server room. The switch module 201 includes two switch monomers 2011, each switch monomer 2011 includes two core switches 20111 and two access switches 20112, the core switch 20111 is electrically connected to the access switch 20112, the servers in the first server room and the second server room are respectively connected to the access switches 20112 in the corresponding switch monomers, and the core switch 20111 in the switch monomer 2011 is electrically connected to the switch 101 for the controller to connect to the controller.

[0034] The core server room considers the dual-active room architecture. The core server room of a pellet production line considers redundant construction. The rooms in different physical locations build a set of hyper-converged server system platforms, but the core servers can be arranged in rooms in different physical locations. The use of hyper-converged server cluster platform software can realize a set of control systems for dual-active rooms, ensuring that the second server room can continue to maintain normal production management without any impact when the first server room faces uncontrollable factors such as production accidents, natural disasters, and wars.

[0035] First server room: configure 4 servers 202 to form a hyper-converged server cluster 1;

[0036] Second server room: configure 4 servers 203 to form hyper-converged server cluster 2;

[0037] The use of a hyper-converged server cluster system has the following obvious advantages:

[0038] 1. Data is more secure. The cluster shares a resource pool, backs up data to each other, and has recovery and reconstruction functions.

[0039] 2. The business is safer and more reasonable, resources are allocated according to business demand priorities, and load balancing is achieved.

[0040] 3. Low long-term construction cost, no additional disaster recovery cost, optimized and reduced client resource cost. The system intervals are connected, so different systems can be mixed at will.

[0041] 4. The efficient and intelligent operation mode has achieved cost reduction and efficiency improvement in production and reduced personnel costs to a certain extent.

[0042] The hyper-converged server cluster system includes a historical database server, an intelligent batching server, an intelligent pelletizing server, and a mill full-process material monitoring and control server.

[0043] The hyper-converged server cluster system platform has control management and intelligent analysis functions, and can regularly collect the operating status of the cluster, including: scale, cluster status, storage status, resource status, alarm information, etc. It can monitor and manage multiple clusters in a unified manner, and has the following functions:

[0044] Function 1:

[0045] To ensure the high intelligence of the entire system, the system needs to provide platform intelligent analysis functions, which can collect the running status of the cluster at regular intervals, including: scale, cluster status, storage status, resource status, alarm information, etc. Multiple clusters can be uniformly monitored and managed. The deployment tool (LCM) is a dedicated tool for hyper-converged clusters. Through this dedicated tool, the entire cloud operating system platform can be quickly built in a graphical wizard manner. The deployment tool supports the deployment of network models of external network VLAN and internal data network VLAN. Help users to achieve VLAN isolation of different services and tenants. Effectively provide network reliability and security within the platform. The deployment method of fully redundant symmetric structure ensures that when any node fails or the service stops, the business requests carried by the node are quickly shared by other nodes. The deployment link of LCM can be divided into cluster configuration and node configuration. The configuration of the cluster mainly involves the network of the cluster and the configuration name of the cluster. In the node configuration, the role of each node can be configured as needed. The optional roles are: control, network, computing, and storage. During the deployment process, one node will be selected from all nodes as the deployment node, and the deployment node will send deployment tasks to other nodes. After receiving the deployment task, other nodes execute it and feedback the execution results. The whole process supports idempotent deployment, which allows users to deploy repeatedly. In addition to providing deployment capabilities, LCM also provides basic cluster management capabilities. When you need to stop the cluster, you can log in to LCM through the IP address of any node. With the one-click stop or one-click start capabilities, you can shut down or start the cluster in the most reasonable way.

[0046] Function 2: Resource Management

[0047] This hyper-converged server cluster system does not need to set up and manage storage objects such as RAID, NAS, LUN, and Volume. You only need to set up the virtual disk of the virtual machine to use the storage function. It supports setting alarm thresholds for cluster CPU usage, memory usage, system services, disk read and write rates, disk usage, network throughput, CPU load, etc., and automatically triggers email alarms when the thresholds are exceeded. The storage management platform of the hyper-converged server cluster system maintains high performance in a virtualized environment using all-flash or hybrid disk configurations through optimized I / O paths; Enterprise MLC flash devices are used in resource management platform deployment to ensure that data is not lost in the event of a power outage. Write operations are directed to the flash media of the resource pool in a sequential manner, and copies are written to the flash memory on other nodes to maintain data availability. Later, by collecting thousands of small random write operations from the storage intent log of the hyper-converged cluster, allocating space sequentially on the storage pool, and then performing write operations as several large I / Os, the write operations are degraded to the storage pool in a sequential manner. Performing write operations on the storage pool in a sequential manner can maximize I / O performance and SSD durability.

[0048] The path for writing I / O is as follows:

[0049] 1. Write I / O is handled by the local storage management instance closest to the Guest VM.

[0050] 2. Data striping is as wide as possible, and data copies are created. The data and its copies are written to the Juchen storage intent log on the flash media of at least two different nodes through the network.

[0051] 3. Each node confirms that the data has been written to the flash media.

[0052] 4. After all data (including copies) are written to the flash memory, the write I / O confirmation information is returned to the Guest VM.

[0053] 5. The data will eventually be written to the HDD.

[0054] Function 3: Cloud Host Management

[0055] It supports unified management of virtual machines, including power on / off, restart, adding network cards, migration, editing, snapshots and other functions. Among them, online migration of virtual machines refers to migrating a virtual machine from one computing node to another computing node without stopping the service.

[0056] The process of virtual machine online migration is as follows:

[0057] Start the virtual machine on the target node;

[0058] Copy the memory to the virtual machine of the target host (with bandwidth limitations). The virtual machine continues to run on the source node. The entire memory is copied to the target node for the first time, and then the dirty pages are copied iteratively (new memory updates).

[0059] Synchronize virtual machine status, quickly (no bandwidth limit), all device status and dirty pages are copied;

[0060] Complete the migration and broadcast the network location at the target node;

[0061] Virtual machine snapshots are based on QEMU's Quiesce / Unquiesce technology for the Guest file system. During the snapshot phase, the virtual machine file system is silenced for a very short period of time to ensure that no I / O occurs in the virtual machine during this phase to ensure data consistency at the same point in time. There are two types of virtual machine snapshots:

[0062] Scenario:

[0063] First: The virtual machine is in shutdown state;

[0064] Second: The virtual machine is in the running, updating, and non-shutdown state;

[0065] When the virtual machine is in shutdown state, the principle of taking a snapshot of the virtual machine is as follows: each time a snapshot is created, a quota space of the same size as the original disk is allocated, which is reserved for overwriting operations after the snapshot point. After a write operation of "creating a snapshot" is performed, the newly written incremental data will fall into the original disk, and the replaced data of the original disk will be written to the newly added quota space.

[0066] When the virtual machine is in operation, all disks under it are snapshotted online and a memory snapshot is generated. The memory snapshot is to export the memory context of the virtual machine into a file (Image_memory) through Libvirt and then upload it to the image service.

[0067] The present invention also provides a changeable and flexible data interface platform, providing a flexible virtual machine interface for various on-site intelligent panels, operation and maintenance modules, etc., to facilitate real-time dynamic monitoring by operators.

[0068] The monitoring interactive terminal group 30 is used to monitor the production status data of the distributed DCS control equipment, and the monitoring interactive terminal group 30 includes a plurality of monitoring interactive terminals;

[0069] The controller group 10 and the server cluster 20 are respectively configured in corresponding independent space areas, and the controller group 10, the server cluster 20, and the monitoring interactive terminal group 30 are respectively electrically connected to the ring network switch group 40;

[0070] Each DCS controller exchanges information with the production operation subsystem of the target operation type through the corresponding switch in the ring network switch group 40 and independently controls the production operation subsystem. Each production operation subsystem is configured in a corresponding independent spatial area, wherein each switch directly electrically connected to each production operation subsystem is independent of each other.

[0071] In some embodiments, the switches in the ring network switch group 40 are configured not only in the independent space area where the controller group 10 and the server cluster 20 are located, but also in the independent space area where the production operation subsystem is located.

[0072] In some embodiments, the production operation subsystem includes a pre-batch system 501, a batching and mixing system 502, a dry grinding system 503, a pelletizing and roasting hot air system 504, and a screening system 505. The pre-batch system 501, the batching and mixing system 502, the dry grinding system 503, the pelletizing and roasting hot air system 504, and the screening system 505 are respectively located in different and independent workshops.

[0073] In some embodiments, the power distribution room of each workshop where the pre-batch system, batching and mixing system, dry grinding system, pelletizing and roasting hot air system and screening system are located is equipped with a number of switches, and these switches are also part of the ring network switch group 40. In some embodiments, the workshop where the pre-batch system 501 is located is equipped with two sixth switches 5021 connected in series, the sixth switch 5021 is electrically connected to the pre-batch system 501, and the pre-batch system 501 forwards its real-time production data through the sixth switch 5021; the workshop where the batching and mixing system 502 is located is equipped with two seventh switches 5022 connected in series, the seventh switch 5022 is electrically connected to the batching and mixing system 502, and the batching and mixing system 502 forwards its real-time production data through the seventh switch 5022; the workshop where the dry grinding system 503 is located is equipped with four seventh switches 5023 connected in series, and the seventh switch 5023 is electrically connected to the batching and mixing system 502. 23 is electrically connected to the dry grinding system 503, and the dry grinding system 503 forwards its real-time production data through the seventh switch 5023; the workshop where the ball making and roasting hot air system 504 is located is equipped with three eighth switches 5024 connected in series, and the eighth switch 5024 is electrically connected to the ball making and roasting hot air system 504, and the ball making and roasting hot air system 504 forwards its real-time production data through the eighth switch 5024; the workshop where the screening system 505 is located is equipped with three ninth switches 5025 connected in series, and the ninth switch 5025 is electrically connected to the screening system 505, and the screening system 505 forwards its real-time production data through the ninth switch 5025.

[0074] The first switch 10112 lays two 16-core optical cables externally and is electrically connected to the two sixth switches 5021 in the distribution room of the pre-batch system 501; the second switch 10122 lays two 16-core optical cables externally and is electrically connected to the two seventh switches 5022 in the distribution room of the batching and mixing system 502; the third switch 10132 lays two 16-core optical cables externally and is electrically connected to the first and last seven switches 5023 in the distribution room of the dry grinding system 503; the fourth switch 10142 lays two 16-core optical cables externally and is electrically connected to the first and last eight switches 5024 in the distribution room of the ball making, roasting and hot air system 504; the fifth switch 10152 lays two 16-core optical cables externally and is electrically connected to the first and last nine switches 5025 in the distribution room of the screening system 505.

[0075] Two optical cables are connected from the instrument equipment room in the main control room to the independent space where each production operation subsystem is located. A ring redundant network is formed through several ring network switches in the room. The DCS controller, frequency conversion soft start, intelligent instruments and other equipment in the independent space can be connected to the ring network switch in a star-shaped access manner. Each production operation subsystem collects and monitors each other without interfering with each other.

[0076] At least part of the monitoring interactive terminals in the monitoring interactive terminal group 30 is configured in the independent space area where the corresponding production operation subsystem is located. The monitoring interactive terminal obtains the real-time production data of the production operation subsystem. The L0-level monitoring interactive terminals are divided into: PT100 thermal resistor, K-type thermocouple, S-type thermocouple, pressure transmission, electromagnetic flowmeter, radar level meter, weighing transmission, electronic belt scale, quantitative feeder and particle size detector, etc. The data collection of each production operation subsystem is simple and efficient, the network configuration is simple, and the security independence is high.

[0077] In some embodiments, the monitoring interactive terminal group 30 includes: a switch 301 for thin terminal general docking configured in the monitoring room of the main control room and multiple thin terminals 302, and all thin terminals 302 are electrically connected to the core switch 20111 in the switch monomer through the switch 301 for thin terminal general docking. With the hyper-converged server cluster as the background, the monitoring interactive terminal adopts the form of a virtual machine thin terminal, uses desktop virtualization technology, and accesses the cluster server background through the network to achieve production monitoring, office management, etc. The configuration cost is low and the management is centralized and advanced. The monitoring interactive terminal is flexible and can switch permissions and expand interfaces at any time to meet production management needs. It meets the various monitoring needs of developers and production managers in the main control room, such as centralized monitoring, extended monitoring, on-site monitoring, and remote monitoring.

[0078] The switches at the data core layer adopt a dual-switch redundant stack configuration. The network architecture based on the hyper-converged server system platform has extremely high requirements for data switches. Whether it is data capacity, link aggregation, network equipment management and maintenance, or protocol security protection, there are strict requirements for switches. In addition, dual-switch redundant stacks are considered to add a layer of security protection on the basis of selecting reliable hardware switches; the redundant stack switches are as follows:

[0079] Switch 301 for connecting thin terminals;

[0080] Each switch unit 2011 in the first server room and the second server room includes two core switches 20111 and two access switches 20112;

[0081] Switch 101 for general connection of controllers;

[0082] In some embodiments, a distributed DCS control method is provided, which is applicable to a distributed DCS control device, and includes the following steps:

[0083] Collecting real-time production data of each production operation subsystem through a monitoring interactive terminal of a part of the monitoring interactive terminal group 30;

[0084] Transmitting the real-time production data to the DCS controller in the controller group 10 through the corresponding switch in the ring network switch group 40;

[0085] Through the corresponding switches in the ring network switch group 40, the server cluster 20 receives, stores and processes the data from all DCS controllers, where the data of the DCS controllers includes the real-time production data and processing instructions derived from the real-time production data;

[0086] A part of the monitoring interactive terminal group 30 is used to obtain real-time production data from the server cluster 20 and display it, and output operation instructions to the DCS controller through the ring network switch group 40.

[0087] The above is only a specific implementation of the present invention and does not limit the protection scope of the present invention. Any person skilled in the art can easily think of fabrications and changes within the technical scope of the present invention, all of which should be included in the protection scope of the present invention. Therefore, the protection scope of the claims should be taken as the protection scope of the present invention.

Claims

1. Distributed DCS control equipment, characterized in that: include: A controller group, including multiple DCS controllers; Server clusters include multiple servers deployed in different independent spatial areas; A monitoring interactive terminal group for monitoring the production status of distributed DCS control equipment, including multiple monitoring interactive terminals; A ring network switch group, including multiple switches; The controller group and the server cluster are respectively configured in corresponding independent space areas, and the controller group, the server cluster, and the monitoring interactive terminal group are respectively electrically connected to the ring network switch group; Each DCS controller exchanges information with the production operation subsystem of the target operation type through the corresponding switch in the ring network switch group and independently controls the production operation subsystem. Each production operation subsystem is respectively configured in a corresponding independent space area, wherein each switch directly electrically connected to each production operation subsystem is independent of each other, and at least part of the monitoring interaction terminals in the monitoring interaction terminal group is configured in the independent space area where the corresponding production operation subsystem is located.

2. The distributed DCS control device according to claim 1, characterized in that: The switches in the ring network switch group are configured in an independent space area where the controller group, the server cluster and the production operation subsystem are located.

3. The distributed DCS control device according to claim 1, characterized in that: The production operation subsystem includes pre-batch system, batch mixing system, dry grinding system, pelletizing and roasting hot air system and screening system.

4. The distributed DCS control device according to claim 3 is characterized in that: Several switches are configured in each workshop where the pre-batch system, the batching and mixing system, the dry grinding system, the pelletizing and roasting hot air system and the screening system are located.

5. The distributed DCS control device according to claim 4, characterized in that: The controller group is configured in the instrument equipment room of the main control room. The instrument equipment room of the main control room is configured with a switch for controller general docking and five control units. Each control unit includes a switch and at least one DCS controller electrically connected to the switch. The switch for controller general docking is electrically connected to the DCS controllers in all control units, and the switch in each control unit is electrically connected to the switch in the corresponding production operation subsystem.

6. The distributed DCS control device according to claim 5, characterized in that: The server cluster is configured in a server room, which includes a first server room and a second server room with independent location areas. A switch module is configured in the server room, and the switch module includes two switch units. Each switch unit includes a core switch and an access switch. The servers in the first server room and the second server room are respectively connected to the corresponding access switches in the switch unit, and the core switch in the switch unit is electrically connected to the switch for the controller to connect to the controller.

7. The distributed DCS control device according to claim 6, characterized in that: The monitoring interactive terminal group includes: a switch for thin terminal general connection and multiple thin terminals configured in the monitoring room of the main control room, and all thin terminals are electrically connected to the core server in the switch monomer through the switch for thin terminal general connection.

8. A distributed DCS control method, characterized in that: A distributed DCS control device applicable to any one of claims 1 to 7, comprising the following steps: Collecting real-time production data of each production operation subsystem through a monitoring interactive terminal that is part of the monitoring interactive terminal group; Transmitting the real-time production data to a DCS controller in the controller group through a corresponding switch in the ring network switch group; Through the corresponding switches in the ring network switch group, the server cluster receives, stores and processes the data from all DCS controllers, wherein the data of the DCS controllers includes the real-time production data and processing instructions derived from the real-time production data; A part of the monitoring interactive terminal group is used to obtain real-time production data from the server cluster and display it, and output operation instructions to the DCS controller through the ring network switch group.

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