E stop only works when active high is set, which is wrong!

[JAZZCNC]

Sounds to me like you may be using the wrong Input number or not set the port number or something then because mach isn't seeing the pin state change.

If you had the correct pin number then toggling the Active state would work no matter if your inputs used pull up or down resistors.

Not using the correct pin/port number or a Blown input is the only thing that would do this. The fact Mach resets when you toggle Lo active just means your tricking mach into thinking E-stop is there. It's basicly watching that input to go high which never will because you have the wrong Input number or it's dead.!