说明：  CoDeSys (工业控制) 交通灯教程程序新鲜出炉，用于初学者学习如何使用3S公司的编程平台，我用的版本是beckhoff公司的TwinCAT，大同小异，基本上PLC控制软件都可以使用只需要改下MAIN文件名称就行
(CoDeSys (industrial control), freshly traffic lights tutorial program for beginners to learn how to use the 3S' s programming platform, I used version is beckhoff' s TwinCAT, much the same, basically PLC control software can be used to change only under the MAIN file name on the line)