I am wondering if anybody can tell me the how IsMoving reacts after an EStop is triggered.
When an EStop is triggered, i assume Mach3 decelerates all the axises at the maximum rate, and when the axis is stopped, then resets IsMoving.

Can any of the brain experts confirm this?

I would like to set an output when an estop triggers and reset the output after short delay on the IsMoving is reset.

Estop does NOT deaccelerate the axis it simply dumps the buffer . You will loose positon . 

(;-) TP

NEVER push the big red button while moving, unless you really really really need it to stop!