Allen-Bradley PowerFlex 40P User Manual

Troubleshooting 4-5
F91 Encoder Loss Requires differential encoder.
One of the 2 encoder channel
signals is missing.
1. Check Wiring.
2. If P038 [Speed Reference] = 9
“Positioning” and E216 [Motor
Fdbk Type] = 5 “Quad Check”
swap the Encoder channel inputs
(see page 1-18
) or swap any two
motor leads.
3. Replace encoder.
F100 Parameter
Checksum
➁
The checksum read from the
board does not match the
checksum calculated.
Set P041 [Reset To Defalts] to
option 1 “Reset Defaults”.
F111 Enable
Hardware
DriveGuard Safe-Off Option
(Series B) board is installed and
the ENBL enable jumper has not
been removed.
1. Remove the ENBL enable
jumper.
2. Cycle power.
DriveGuard Safe-Off Option
(Series B) board has failed.
1. Remove power to the drive.
2. Replace DriveGuard Safe-Off
Option (Series B) board.
Hardware Enable circuitry has
failed.
Replace drive.
F122 I/O Board Fail
➁
Failure has been detected in the
drive control and I/O section.
1. Cycle power.
2. Replace drive if fault cannot be
cleared.
(1)
See page 4-1 for a description of fault types.
No. Fault
Type
(1)
Description Action

Allen-Bradley PowerFlex 40P Specifications

General

Brand	Allen-Bradley
Model	PowerFlex 40P
Category	Controller
Language	English