Just had a quick question with regards to minimum spindle speed when using an external control signal. I'm using this VFD along with a 400hz high speed spindle and I've noticed several recommendations to not run these spindles under a frequency of 120HZ. However, with the min speed set to 120 when I'm using the external signal when the signal is reduced to 0V the spindle still runs at 7200 RPM until I hit the stop button. Is it possible change the parameter to 0hz with the understanding that my program would not call a speed under 7200RPM so spindle can stop when the spindle signal is at 0V without needing to press the stop button.

Is there an operational difference in the signal going to 0V vs the stop button being pressed to make the spindle stop?