本文介绍了交通红绿灯基本控制形式,针对带绿闪的红绿灯和带数显的红绿控制和实现方法,详细论述了相应的编程方法和技巧。实验证明编制的程序运行可靠,简单实用。 关键词:可编程控制器(PLC);红绿灯;绿闪;数显 Abstract:The basic control methods of traffic light are introduced in the paper. Through introducing the traffic light with shining of green light and the traffic light program with digit displaying, the programming methods and programming technique are discussed in detail. The experiments have shown that the software work reliably, and the software are simple and practical. Key words:Programmable Logic Controller(PLC); traffic light; green shinning; digit displaying