I have a Mitsubishi FR720D VFD, PMDX 126 and 107 boards and Mach III software. I think the problem is with some of the VFD settings however I am having problems getting some of the parameters set, I am sure at this point it is a problem with the parameters...just trying to figure out where. I am unable to get PR73 to change to where it should be so I am thinking there is an additional PR that needs to be set I just can't figure out which one.