Design of Multi-channel Temperature Control Inspection System Based on PLC

The temperature control system is widely used in the field of industrial control, such as the boiler's temperature control system in Steel, chemical plants and thermal power plants. For the requirements of remote centralized management and security monitor in temperature control system, a temperature control inspection system consisted by down-computer clew and up-computer, is designed in this paper. In this system, a programmable logic controller (PLC) is use as up-computer, multiple AI smart meters are use as down-computer clew. The structure of the system hardware and the interconnection of the various parts are introduced simply, the design and implementation of communication system of down-computer is elaborated in detail, and the part of the communication system program is given. The actual operation shows that the remote monitoring function can be realized and design requirements be satisfied by the application of intelligent instruments of real-time collection, processing and feedback on the site temperature, and high efficiency, high universality and reliable stability are the advantages of the system.