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What could be causing a Port 1 or 2 DPI Loss Fault on my PowerFlex 755T (R,L,S) VFD?

This article provides possible reasons why a PowerFlex 755T (R,L,S) VFD could be showing a Port 2 DPI Loss Fault

Step 1: 

Verify the HIM cable is connected on each end correctly

 

Step 2: 

If you have another HIM, replace the HIM on the faulted VFD to see if the fault goes aways

 

Step 3:

Verify that Port 1 (HIM on the Drive)  or Port 2 (HIM on the Door) Initial Screen Parameter is set to "Status SCN"

NOTE: The PowerFlex 755T Series does not support the Process Screen which normally would show the AMPS, Voltage, Etc..