Quote Originally Posted by northbynate View Post
"If the 'charge pump always on" checkbox is not set then the PWM signal is only active if the software is not in reset and inactive if in reset."

That's what I was getting at. In this case if UCCNC goes into reset then the charge pump signal stops right? So that can be used as a way to tell if an e-stop on a wireless mpg has been hit. Thanks again for your help!
Kind of but that then defeats the point of a Charge pump, you want the charge pump working all the time.

Also, not sure it will work, you could end up stuck in a loop, Master relay won't reset because don't see the charge pump signal and you can't activate the Charge pump without resetting the software which won't come out of reset without the master saying it's safe to do so.??? Give it a try.!