Rockwell Automation 23P PowerFlex Digital DC Drive User Manual
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Rockwell Automation Publication 20P-UM001K-EN-P - July 2014
Appendix C
Application Notes
Troubleshooting Crane Setup - Encoderless
The following faults commonly occur during drive commissioning.
F4 “AC Undervoltage”
•
If the mains supply is still present, reduce the undervoltage level at P481
[UnderVolt Thresh].
F5 “Arm Overvoltage”
•
Verify the parameter settings as stated in Set Up the Drive on page
F94 “TrqProve Spd Band” (Speed deviation fault)
•
This fault is active only when TorqProve is enabled.
•
The speed loop tuning is not correct. Increase P434 [Spd Reg BW] or P43
[Total Inertia]. If theses values are too high the regulator will become
unstable.
•
P1008 [Spd Reg Fdbk] should follow P113 [Ramp Out] as closely as
possible.
•
The drive is going into current limit. The drive is undersized or
acceleration / deceleration is set too fast.
•
The brake is not opening. Check for faulty brake operation.
For more fault information, refer to Chapter 4 Troubleshooting, starting on page