For beginners in PLC, there will always be some difficulty in writing one click start stop programs that are occasionally mentioned in the industry without understanding the scanning working principle of PLC CPU! Today, we will share the programming of different ways of one key start stop for the 200 series PLC.
1、 Using bit logic instructions combined with PLC working principle to achieve one click start stop program writing 1
2、 Using bit logic instructions combined with PLC working principle to achieve one click start stop program writing 2
3、 Programming of One Key Start Stop Using Logic Operation Reverse Instruction
四、采用逻辑运算异或指令实现一键启停的程序编写
五、复位优先双稳态指令
6、 Using the principle of scanning relationships
七、计数器
There are other ways of writing besides this, but the first two methods are applicable to any brand series of PLCs.