基于PLC的交通信号灯控制设计.docx

communication technological. It has simply structure, conveniently program and high reliability, and

widely uses in industry process and in automatic position control. Because PLC has a strong characteristic

adapting to environment and simultaneously it’s internal timer resources are extremely rich, the signal

lights which is universally used on the present have been controlled accurately, specially to the multi-road

fork control. This passage introduces single crossroads traffic lights control methods for example to

achieving the methods of controlling single crossroads traffic light based on PLC.