十字路*通信号灯PLC控制系统,本文设计了基于PLC控制的交通信号灯控制系统。该系统选用的可编程逻辑控制器是德国西门子公司的S7-200，具有一定的智能性，即可以根据路面车流量大小对十字路口的交通信号灯按高峰期、正常期和晚间几个时段进行分时控制。-Intersection traffic signal control system PLC, the paper design of PLC based control of traffic signal control system. The system is optional programmable logic controller is the German company Siemens S7-200, has a certain intelligence, that is, the road traffic flow based on the size of the traffic lights at the crossroads by the peak of the normal period and the evening for several hours Time control.