Quote Originally Posted by Neale View Post
The Huanyang VFD is controlled by the CSMIO and I have been assuming
My Siemens VFDs have Stop and E-Stop wired inputs, it's this input and not a peripheral device which should be relied upon to implement the E-Stop.
Most good E-Stop switches have at least two circuits to facilitate direct control of the nastiest component of a machine, if it's all nasty then it usually operates a mains cut off but for most lathes and mills killing the spindle removes the most risk, the motor cannot start while the wired E-Stop to the VFD is active.