What is the composition of the industrial computer field bus system? How many parts are there?
Industrial computer field bus system (FCS), which is used in the production field and realizes two-way serial digital communication between computerized measurement and control equipment, is also called the bottom control network of open, digital and multi-point communication. It is widely used in automation systems in manufacturing, process industries, buildings, transportation and other fields. The I-controller field bus system is mainly composed of three parts: the field device layer, the process monitoring layer and the information management layer.
The field device layer is applied to the top layer of the entire system, and its main function is to connect field devices, such as distributed I/O, sensors, drivers, actuators, switchgear, etc., to complete the interlocking control of field devices and devices. The master station (PLC, PC, etc.) is responsible for bus communication management and all slave station communication.
The process monitoring layer is located in the middle layer of the control system, and consists of an operation console computer, a console computer or a PLC plus an Ethernet card to form an industrial Ethernet. The transmission speed of the process monitoring layer is not the most important, the important thing is to be able to transmit a large amount of information, and the communication is deterministic and repeatable in the case of high real-time requirements.
The information management layer is at the top layer of the control system and adopts the general TCP/IP protocol. The devices that can be connected to the information layer include controllers, PCs, operator stations, high-speed I/O, other local area network devices, and gateway devices. Access the Internet. The main characteristics of the communication at the information management layer are that the amount of communication data is large, the occurrence of communication is relatively concentrated, high-speed link support is required, and real-time requirements are not high.
