Hi,
HuanYang are famous for having non-Modbus compliant comms, that's the reason for the special plugin in Mach3
for these VFDs.
The manufacturers must have taken a lot of heat over the non standard comms because they have released later models
which are compliant.....just they are more expnsive....so people still buy the el-cheap ones with this result.
I'll try to find the model identifier, its something like HuanYang nnnn.GM, with the GM, or some other accronym signaling
compliance with the Modbus standard.
Craig