This passage introduce what’s the Programmable Logic Controller( Called PLC for short), its production and development, the development of China and the trend of development its distinctive characteristic, its basic structure and the process of work at first.
Then according to the principle and the excellent quality of the PLC, It can use PLC to control different kinds of liquid. This controlling process can make a single circuit or make in succession, it has the function of breaking off the electricity and bearing in memory, it can restore electricity then break off the electricity step to continue moving. At tight time, it can finish one circle at least. Accomplished product and moving belt can distribute to assemble. This procedure also has the ability of preventing bad moving.
Key Words: PLC Sensors Pulse Timer
