Opening the feed to the drive is not only undesirable it defeats the whole object of VFD control.
You will not get the advantage of controlled deceleration start/stop etc.
There are configurable low voltage inputs to control start/stop/direction etc, also variable speed or programmable pre-set speed settings.
If you want CNC S & M3/M4/M5 control then you will need power at all times to the drive.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.