The task of PLC communication is to connect PLCs, computers, various field devices, etc. with different geographical locations through communication media, and to complete data transmission, exchange, and processing in a specific communication method according to the prescribed communication protocol. There are two main ways of data communication: parallel communication and serial communication. Parallel communication is a data transmission method based on bytes or words, which requires control lines for data communication in addition to 8 or 16 data lines and a common line. The transmission speed of parallel communication is fast, but the number of transmission lines is large and the cost is high. It is generally used for short-range data transmission. Parallel communication is generally used within PLCs, such as data communication between internal components of PLCs, between PLC hosts and expansion modules, or between close range intelligent modules.

Emerson 1C31166G02 controller Emerson not only draws on the design essence of traditional DCS with “centralized management and decentralized control”, but also retains the inherent flexibility and advantages of traditional PLC. It is suitable for discrete control, sequential control, and continuous control scenarios, achieving high-tech automation at a cost. When installing the base (RACK), after determining the positions of various control components and cable trays inside the control box, the hole positions should be calibrated according to the dimensions shown on the drawing, and the fixing screws should be tightened until the base is firmly secured after drilling. Before installing the power supply module, it is necessary to pay attention to whether the grounding terminal of the power line is connected to the metal casing. If not, it must be connected. Digital control machine tools and machining centers have formed fully automated real-time control systems in modern society. By using highly reliable components to accelerate equipment operation, the control system can quickly use diagnostic solutions to find the cause of mechanical failures and handle them in a timely manner, reducing the loss of electromechanical integrated equipment. But this method requires stopping the operating equipment halfway to identify the cause of the malfunction. But as long as the fault can be promptly identified and repaired, the damage can still be reduced to a certain extent