Rockwell Automation 20D PowerFlex 700S Drive Ph I Control, Frames 1...11 User Manual
Page 160
4-6
Troubleshooting
16
Inv OLoad Pend
The drive's operating point is approaching the intermittent current
rating limitation. If output current remains at or above present levels,
an Inverter Overload condition will occur.
Operation of the Inverter Overload function is configured with the
following parameters:
• 336 [Service Factor]
• 337 [Mtr I2T Curr Min]
• 338 [Mtr I2T Spd Min]
• 339 [Mtr I2T Calibrat]
Reduce the load on the drive
17
Inv OLoad Trip
The drive's operating point has exceeded the intermittent current
rating and a foldback to the continuous rating in parameter 400
[Rated Amps] has occurred.
Operation of the Inverter Overload function is configured with the
following parameters:
• 336 [Service Factor]
• 337 [Mtr I2T Curr Min]
• 338 [Mtr I2T Spd Min]
• 339 [Mtr I2T Calibrat]
Reduce mechanical load
18
Ext Fault Input
A digital input has detected an external fault.
Enter a value of 11 “Aux Fault” or 12 “AuxFault Inv” in one of the
following parameters to configure an input to detect an external fault:
• 838 [Digin 1 Sel]
• 839 [Digin 2 Sel]
• 840 [Digin 3 Sel]
19
DSP Memory Error
Flash memory does not match the SRAM memory
20
DSP Device Error
A DSP (VPL) interrupt task has not been completed in the allotted
time.
21
Err Inertia Test
Not Used
22
Over Frequency Fault Encoderless algorithm fails to converge on correct speed. Two
possible causes:
Velocity regulator is attempting to run below motor’s slip speed
Frequency regulator “pulls out” and commanded motor frequency
slows to maximum frequency limit.
23
MC Commissn Fail
The drive has failed to complete either the Motor Autotuning
procedure or the Power Circuits Diagnostics test. Parameters 552
[MC Diag Error 1], 553 [MC Diag Error 2], and 554 [MC Diag Error 3]
display Motor Autotuning and Power Circuit Diagnostic faults.
24
DC Bus Overvolt
Bus voltage has exceeded 815V dc in 400volt class drives or 405V
dc for 200 volt class drives.
1. Verify the AC Line.
2. Verify that either Par 414 [Brake/Bus Cnfg],
the brake or bus regulator is enabled.
3. Verify that Par 128 [Regen Power Lim] is set
properly.
4. If Par 414, bit 0 [Brake Enable] is set, verify
braking resistor is properly sized.
26
Ground Fault
A current to earth exceeds 35% of the peak drive rating
Check the motor and external wiring to the
drive output terminals for a grounded condition.
27
Inst Overcurrent
Instantaneous motor current exceeds 214% of rating
28
VPL/MC Comm Fail
A communication failure has occurred between the Velocity Position
Loop (VLP processor and the Motor Control (MC) processor on the
main control board. Possible causes are:
• MC has failed to complete or pass diagnostic tests This is
Indicated when Fault Test Point 16 equals 1. This test point is
viewed in parameter 330 [Fault TP Data] when parameter 329
[Fault TP Sel] equals 16 “VPL Handshak”.
• VPL has not detected MC handshake activity for over 32 ms. This
is Indicated when Fault Test Point 16 equals 1. This test point is
viewed in parameter 330 [Fault TP Data] when parameter 329
[Fault TP Sel] equals 15 “MC Handshake”.
• MC has not detected VPL handshake activity for over 32 ms.
No.
Name
Description
Action