Hi,
Mach4 has a very good Modbus plugin, in my opinion light years ahead of the Mach3 Modbus plugin.
If I understand correctly many early model Huanyang VFDs did not follow a strict Modbus protocol at that was why it was
necessary to have the royaumedeole.fr plugin.
More recent models of Huanyang VFDs are Modbus compliant. If memory serves correctly the models that are Modbus
compliant are appened with the letters "GM" or similar.
Do you know what model of VFD you have? Is it a Modbus compliant one?
Craig