Data connection system of EDPF-NT + DCS control system and Foxboro Evo DCS control system

Abstract

The utility model discloses a data connection system of an EDPF-NT + DCS control system and a Foxboro Evo DCS control system, which comprises a communication station, an F host configured with the Foxboro Evo DCS control system and an E host configured with the EDPF-NT + DCS control system, a first RJ45 port of the communication station is in communication connection with the E host, a second RJ45 port of the communication station is connected to an FBM232 communication module through an optical cable assembly, and the FBM232 communication module is connected with the Foxboro Evo DCS control system. Wherein the virtual DPU of the communication station is in communication connection with the F host through the virtual I / O card based on a Modbus TCP / IP protocol. A communication station is established on the basis of the existing virtual DPU and virtual I / O card technology, signals on the EDPF NT + DCS control system side are mapped into the virtual DPU and the virtual I / O card through one communication station, the virtual DPU and the virtual I / O card are set as slave stations, a Foxboro Evo DCS control system is set as a master station, communication of the two DCS systems is established through a Modbus TCP / IP communication protocol, and data exchange is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of realizing data transmission between two DCS control systems, in particular to a data connection system between an EDPF-NT+DCS control system and a Foxboro Evo DCS control system. Background Art

[0002] The alumina production process and the thermal power plant production process use Foxboro's Foxboro Evo control system and Guodian Zhishen's EDPF NT+ control system respectively. They are independent of each other and there is no hardware or network link bridge. However, due to production needs, the alumina production process needs to monitor the thermal power plant, or the thermal power plant needs to monitor certain parameters of the alumina production process. The traditional solution is to lay signal cables, add DCS cards, and use hard wiring to access the control system, so as to realize the signal transmission of the two DCS systems and achieve the purpose of monitoring each other's parameters. In this way, the number and distance of signal transmission are limited. On the other hand, the existing virtual DPU and virtual I / O card technologies are relatively mature and can be combined to solve the above problems. Utility Model Content

[0003] The purpose of the invention of the utility model is to provide a data connection system between an EDPF-NT+DCS control system and a Foxboro Evo DCS control system in view of the above-mentioned problems, which can establish a communication station based on the existing virtual DPU and virtual I / O card technology to realize communication data exchange between the two DCS systems without adding DCS cards.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A data connection system for an EDPF-NT+DCS control system and a Foxboro Evo DCS control system comprises a communication station, an F host configured with a Foxboro Evo DCS control system and an E host configured with an EDPF-NT+DCS control system, wherein the communication station is configured with a virtual DPU and a virtual I / O card connected thereto; and further comprises an FBM232 communication module and an optical cable assembly, wherein the communication station is configured with at least two RJ45 ports, the F host is connected with the FBM232 communication module, a first RJ45 port of the communication station is connected to the E host for communication, and a second RJ45 port of the communication station is connected to the FBM232 communication module through an optical cable assembly, wherein the virtual DPU of the communication station is connected to the F host for communication based on a Modbus TCP / IP protocol through a virtual I / O card.

[0006] The FBM232 communication module is configured with an RJ45 port to be connected to a second RJ45 port of the communication station via an optical cable assembly.

[0007] The optical cable assembly includes an optical cable, a 1# optoelectronic transceiver and a 2# optoelectronic transceiver. The RJ45 port of the FBM232 communication module is connected to the I end of the optical cable through the 1# optoelectronic transceiver, and the II end of the optical cable is connected to the second RJ45 port of the communication station through the 2# optoelectronic transceiver.

[0008] The RJ45 ports are all equipped with RJ45 connectors and network cables. Both ends of the network cables are equipped with RJ45 connectors. The RJ45 port of the FBM232 communication module is connected to the 1# optical transceiver through the RJ45 connector and the network cable. The second RJ45 port of the communication station is connected to the 2# optical transceiver through the RJ45 connector and the network cable. The communication station is a computer.

[0009] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0010] The utility model discloses a data connection system between an EDPF-NT+DCS control system and a Foxboro Evo DCS control system. A communication station is established based on the existing virtual DPU and virtual I / O card technology. A communication station is used to map the signal on the EDPF NT+DCS control system side into a virtual DPU and a virtual I / O card and set them as a slave station. The Foxboro Evo DCS control system is set as a master station. The Modbus TCP / IP communication protocol is used to establish communication between the two DCS systems to realize data exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a system block diagram of the data connection system of the utility model. DETAILED DESCRIPTION

[0012] Example 1

[0013] See also Figure 1 , a data connection system between an EDPF-NT+DCS control system and a Foxboro Evo DCS control system of this embodiment includes an F host configured with a Foxboro Evo DCS control system and an E host configured with an EDPF-NT+DCS control system.

[0014] In order to realize data exchange between two different DCS systems, we analyzed two commonly used communication protocols:

[0015] 1. OPC is an interoperability standard for secure data exchange used in the automation industry and other industries. It is platform independent and ensures seamless transmission of information between devices from multiple manufacturers.

[0016] 2. Modbus TCP / IP protocol is a standard in the field of industrial communication systems. It is an application layer messaging protocol used in conjunction with Ethernet to achieve client / server communication between devices connected on different types of networks. It is used to implement MODBUS data transmission on TCP / IP networks. MODBUS is a universal communication protocol used to connect different types of devices, such as sensors, controllers, and instruments, to achieve real-time data exchange. The protocol has the following advantages:

[0017] 1) Network adaptability: MODBUS TCP / IP protocol is based on TCP / IP protocol stack and can communicate in various network environments, including Ethernet, LAN and WAN;

[0018] 2) Flexibility: MODBUS TCP / IP protocol supports point-to-point and multi-point transmission modes, can communicate between single devices and multiple devices, and is suitable for systems of different scales and complexities;

[0019] 3) Real-time: When transmitting data through a TCP / IP network, the MODBUS TCP / IP protocol can achieve real-time data transmission, quickly respond to requests, and achieve efficient data transmission;

[0020] 4) Simplified configuration: MODBUS TCP / IP protocol uses IP address and port number to identify devices and communication channels. Through simple configuration, fast connection and communication of devices can be achieved.

[0021] 3. The main difference between the two protocols in practical applications lies in the different application environments:

[0022] Modbus TCP / IP protocol and OPC communication protocol are both communication protocols used in the field of industrial automation, but they have some differences. Modbus TCP / IP protocol is a communication protocol based on the TCP / IP protocol stack. It uses a client / server model to achieve communication. Modbus TCP / IP protocol is a network layer protocol. It is only responsible for the infrastructure of network communication, that is, the sending and receiving of data packets in the network. It provides a universal and standardized communication method that can connect different networks and devices. Its main function is to ensure that data can be transmitted between various networks and devices, and that the data transmission is reliable and orderly. The OPC protocol is mainly used for data transmission and communication between devices in the field of industrial automation. It is based on Microsoft's COM / DCOM technology and is a device-to-device (C / S mode) protocol. The OPC protocol mainly focuses on the data format and transmission of the application layer. It defines a standard interface and protocol so that different devices can interact with each other through this interface and protocol, and provide more data access functions and security protection measures.

[0023] Through comparative research, it is found that OPC is an application layer protocol with complex application configuration and unstable real-time data exchange, which is not suitable for communication at the DCS control layer. Modbus TCP / IP is a network layer protocol with simple network configuration and stable and reliable real-time data exchange, which is suitable for communication at the DCS control layer. Therefore, the Modbus TCP / IP protocol is used to realize data exchange between the EDPF-NT+DCS control system and the Foxboro Evo DCS control system.

[0024] As mentioned above, Modbus TCP / IP is used as the communication protocol; on one side, a communication station (computer) is used to map the signal on the EDPF NT+DCS control system side into a virtual DPU (controller) and a virtual I / O (input / output) card, and set it as a slave station, that is, the communication station (computer) is used to virtualize the EDPF NT+DCS control system into a controller and several I / O (input / output) cards to be used; on the other side, the Foxboro Evo DCS control system is set as the master station, and the Modbus TCP / IP communication protocol is used to establish communication between the two DCS systems to achieve data exchange. In this way, the number and distance of signal transmission are not only limited, but also no additional DCS cards are required, and no additional hardware investment is required.

[0025] like Figure 1As shown, the spare core of the original optical cable is used as the physical link, and Modbus TCP / IP is used as the communication protocol to connect the two DCS systems. The Foxboro Evo DCS control system host is connected to the 1# optoelectronic transceiver through the FBM232 communication module, the 2# optoelectronic transceiver is connected to the communication station, and the EDPF-NT+DCS control system host is connected to the communication station through network A or network B. The Foxboro Evo DCS control system configures the FBM232 module and sets it as the master station; the EDPF-NT+DCS control system establishes a virtual DPU and a virtual I / O card in the communication station and sets it as a slave station, and associates the signals to be sent and received with a channel of the virtual I / O card, thereby realizing signal transmission between the two systems.

[0026] This method is used to achieve interconnection between the two systems. There is no need to re-lay optical cables, add cables, or add DCS cards. The signal transmission volume is large, the transmission distance is long, the speed is fast, stable and reliable, the network configuration is simple, and it fully meets the needs of production control.

[0027] It should be pointed out that the examples of the above-mentioned embodiments can be preferably combined with one or more of them according to actual needs, and multiple examples use a set of drawings to illustrate the combined technical features, which will not be described one by one here.

[0028] The above description is a detailed description and illustration of the preferred feasible embodiments of the utility model, but these descriptions are not intended to limit the scope of protection required by the utility model. All equivalent changes or modified changes completed under the technical teachings suggested by the utility model should fall within the scope of patent protection covered by the utility model.

Claims

1. A data connection system between an EDPF-NT+DCS control system and a Foxboro Evo DCS control system, comprising a communication station, an F host configured with a Foxboro Evo DCS control system, and an E host configured with an EDPF-NT+DCS control system, wherein the communication station is configured with a virtual DPU and a virtual I / O card connected thereto; characterized in that: It also includes an FBM232 communication module and an optical cable assembly. The communication station is configured with at least two RJ45 ports. The F host is connected to the FBM232 communication module. The first RJ45 port of the communication station is connected to the E host for communication. The second RJ45 port of the communication station is connected to the FBM232 communication module through an optical cable assembly. The virtual DPU of the communication station is connected to the F host for communication based on the Modbus TCP / IP protocol through a virtual I / O card.

2. The data connection system between the EDPF-NT+DCS control system and the Foxboro Evo DCS control system according to claim 1 is characterized by: The FBM232 communication module is configured with an RJ45 port to connect to a second RJ45 port of the communication station through an optical cable assembly.

3. The data connection system between the EDPF-NT+DCS control system and the Foxboro Evo DCS control system according to claim 2 is characterized by: The optical cable assembly includes an optical cable, a 1# optoelectronic transceiver and a 2# optoelectronic transceiver. The RJ45 port of the FBM232 communication module is connected to the I end of the optical cable through the 1# optoelectronic transceiver, and the II end of the optical cable is connected to the second RJ45 port of the communication station through the 2# optoelectronic transceiver.

4. The data connection system between the EDPF-NT+DCS control system and the Foxboro Evo DCS control system according to claim 3 is characterized by: The RJ45 ports are all equipped with RJ45 connectors and network cables, and both ends of the network cables are connected with RJ45 connectors. The RJ45 port of the FBM232 communication module is connected to the 1# optoelectronic transceiver through the RJ45 connector and the network cable, and the second RJ45 port of the communication station is connected to the 2# optoelectronic transceiver through the RJ45 connector and the network cable.

5. A data connection system between an EDPF-NT+DCS control system and a Foxboro Evo DCS control system according to any one of claims 1 to 4, characterized in that: The communication station is a computer.

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