I can confirm that the 97 plugin does NOT work.
Try using the one in post 90 or 97. (Version 95 or 96).
Dan.
With the 97 version, I don't get the message the the VFD is connected when starting UCCNC, and nothing seems to happen.
Reverting back to 95 and it works. Back to 97 and nothing.
One strange thing after going back to 95 is that I no longer get smooth response with the slider. It now has a noticeable delay?
Also, I don't seem to need the PWM Spindle checked. The other day, I actually had Step/Dir Spindle checked. It actually works with either one, or nether one checked.