I am planning on just manually turning the the spindle on and off but I am concerned with how finicky the vfd can be sometimes. What is the easiest way to tell mach that the spindle is running or not? The only thing I am concerned about is the spindle faulting out for some reason and the machine just keeps going because it does not know the spindle has stopped. I am using a hitachi wj200vfd with the ebay special 2.2kw

I'm not really interested in controlling the spindle with mach I do not really need that I just want to be safe and not end up with a machine crash scenario because of a faulted spindle.