【摘要】 文章利用西门子S7-200PLC指令系统进行十字路口交通灯控制的程序设计,给出利用位逻辑指令、顺控指令、比较指令三种不同的设计思路,通过对比,利用比较指令实现的程序,更加简单和容易理解。更多还原

【Abstract】 Based on Siemens S7-200 PLC instruction system for crossroads traffic lights control program design,my paper gives three different design methods which use of bit logic instruction,sequential control instruction and compare instruction.By comparing,the method which using compare instruction is more simple and easy to understand.更多还原