Hello everybody. I was just wondering how to implement the alarm acknowledgement using ladder diagram in PLC. Let's say a latched bit representing an alarm will output a blinking lamp. An acknowledge button could stop the blinking and let the lamp lit, till the alarm becomes normal.

I would appreciate if anyone could help me on this simple matter. I'm quite new to ladder diagrams.

 

Hello
Right before the latch bit, put a"one shot" bit and in the next rung, you should unlatch the alarm.
That "one shot" bit cause the alarm not to go on even though the rung is stil true.
GOOD LUCK