TL140
Lifetime Supporting Member
Hello all,
I have a slight inconvenience happening to me. I have a Do-More H2 PLC, and upon power-loss, the CPU is staying on longer than the input card, causing it to see a loss of inputs, and then triggering alarms. The alarms cut the critical functions of the machine, and change the mode to OFF mode. I am currently writing a power-up initialization program to set everything back to it's original function before the loss of power because these stations are unmanned and run mostly at night. I thought about putting timers of 20 milliseconds or so on all of my alarms, but that would take quite a bit to do, and I also don't like the feeling of delays on alarms for things like e-stops and such.
Just wanted to hear some thoughts and see if you guys had any other ideas of how to mitigate this problem.
Thanks.
I have a slight inconvenience happening to me. I have a Do-More H2 PLC, and upon power-loss, the CPU is staying on longer than the input card, causing it to see a loss of inputs, and then triggering alarms. The alarms cut the critical functions of the machine, and change the mode to OFF mode. I am currently writing a power-up initialization program to set everything back to it's original function before the loss of power because these stations are unmanned and run mostly at night. I thought about putting timers of 20 milliseconds or so on all of my alarms, but that would take quite a bit to do, and I also don't like the feeling of delays on alarms for things like e-stops and such.
Just wanted to hear some thoughts and see if you guys had any other ideas of how to mitigate this problem.
Thanks.