DS200TBQCG1ABB

描述

如果该变频器的波特率是9600b/s，8个数据位，奇校验，1个停止位。那么首先必须在plc的嵌入C窗口的初始化代码区编程一个通讯口设置语句：Set485Port(9600,o,8,1);仅仅一个语句就完成了对485通讯口的编程。

由于485通讯必须设定主从关系，这里是plc控制多台变频器，所以plc必须设置为主，因此还需在初始化代码区增加一个地址和主从设定语句：SetAddress(1,MASTER);事实上，对于主控制器来说，地址已经失去意义。

通讯口已经设置完毕，下面就是如何根据要求将数据发送给变频器。

对FX2系列的PLC与上拉机的通信实现，提出了一种价格低、体积小的接口方案，讨论了其硬件和软件的设计思想，该接口装置与控制室和实验室环境下运行可靠。

关键词：上位机通信接口可编程控制器

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