Hi,
there have been a few posts about the early model Huanyang VFDs that require a special plugin.
To my knowledge no-one has written a similiar plugin for Huanyang/Mach4.
The latest model Huanyng VFDs ARE standard ModBus, I think the models are appended with a suffix -GM, or GS or
similar. Clearly Huanyang must have been getting flak because of their non standard interface.
I personally have always had good success with Delta VFDs.
Craig