本篇文章简单介绍了西门子S7-200PLC系统在交通灯信号灯系统中的应用,重点介绍比较指令在交通信号灯系统梯形图程序设计当中的巧妙应用.%This article introduces the Siemens S7-200PLC system in the traffic light signal system, focusing on the comparison instruction in the ladder program traffic lights system designs clever applications.
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