George--Are you sure of the max RPM? Have you actually checked it with a tach? I found a parameter that had to be changed to get the readout on the VFD to reflect the actual RPM. This is parameter 144 "Rated Motor Revolution" and it seems to mean "per 100HZ". So I set it to 3000 and the readout agrees with my electronic tach.
Prior to the change my readout was showing about half of actual RPM.
Hope this helps.
Edit--"per 100HZ" should read "per 50HZ"