that's the way i would like to have my set up . a separate estop that drops out the power supply which in turn drops out the drives.
my limits and home switches combined and informing mach 3 when they are triggered.
so if i'm reading you correctly then the limit switch when triggered is also wired to the enable on the drive thereby disabling the drives so that's when the override is required? or i can use the limit switch trigger input to MACH 3 to stop the motors and use the Auto Limit Overide feature. ?
l