本章用到的软件是博途15.1,根据实物与指令的结合讲解,PLC选择S7-1200
简单指令:
1、常开触点
PLC中的常开触点对应按钮的常开触点
2、常闭触点
PLC中的常闭触点对应按钮的常闭触点
3、线圈
PLC中的线圈对应接触器及中间继电器的线圈
现有三台电机,要求按顺序启动,逆序停止
第一台电机启动后,第二台电机才能启动,第二台电机启动后第三台电机才能启动。第一台没启动的话,第二台也启动不了。一定是按顺序的。
逆序停止时当三台电机全部启动后,按照逆序停止电机,也就是说第三台电机停止后第二台电机才能停止,第二台电机停止后第一台电机才能停止。
首先画出主回路(简单的画一下,没加热保护,有的断路器是自带保护的)
不用PLC的控制回路
I/O表
程序图
说明
原创文章,作者:cesifu,如若转载,请注明出处:http://www.cesifu.com/article/65747.html
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