For some reason UC400ETH doesnt work with the Mach3 default Turn profile although it does work with the Mill profile. I guess its nothing to do with the profiles but just changing the settings in the "Ports and Pins" dialog should get it to work.
Unless I'm wrong, Is this by design or I just have to run through the settings and UC400ETH should work anyway with the turn profile.
I have checked the settings in the Ports and Pins for the turn profile and don't seem to be doing much wrong over there.