So I just upgraded my Shapeoko to a Huanyang 110v 800w Spindle and a 110v Huanyang VFD

Have everything wired up, settings in, and it works great with manual control through the VFD. When I switch PD001 to 1 for PWM control I can't get it to respond correctly though.

Shapeoko PWM to VFD VI
Shapeoko PWM Ground to VFD ACM
VFD DCM jumped to VFD FOR

On powerup, the VFD starts the spindle and brings it to 400hz.

The VFD starts the spindle even if the shapeoko PWM is disconnected. But even so I verified a DMM reads that the Shapeoko PWM voltage is being modulated correctly based on spindle RPM in GRBL by Universal G-Code Sender, and reaches the VF. PD070 is set to 1 for 5v.

As you would expect, when the DCM and FOR are disconnected it stops.

Have searched Google, this forum, no luck. Any ideas?