Hey Jeremiah,
that the RUN and SPEED functions cease to be controllable by the VFD’s keypad if you change the settings PD001 and PD002 is expected behaviour.
I don’t know what “VR” means as in the PDF manual I have here, there is no such labeling. What if you change the jumper, does the onboard potentiometer work then?
I heard that the Huanyang VFDs exist in different revisions with undocumented changes and terminal variations.
Do you want it to be controlled by the CNC controller? If so, which one do you own?
For the Huanyang HY to Onefinity Elite with MASSO G3 wiring, see here. For wiring the Huanyang HY to the buildbotics-derived Onefinity Controller of Original/X-50/PRO Series, it’s simply the two-wire interface from RS+ and RS- to corresponding pins 13 and 14 on 25-pin I/O Interface, with PD001 and PD002 set to “2”.