Rockwell Automation Publication 750-UM006C-EN-P - March 2022
183
Troubleshooting
Chapter 6
Change Drive Mode:
Change
00:35 [Motor Ctrl Mode]
to 0
(Induction VHz)
Note: Drive will run like a variable speed
starter.
Change Drive Mode:
Change
00:35 [Motor Ctrl Mode]
to 3
(Induction FV) or 6 (PM FV). See PowerFlex
750-Series AC Drives Programming Manual,
publication
Note: Drive runs similar to a motor with a
variable speed starter. For example, there are
no tuning parameters set, encoder feedbacks,
or velocity/portion loops.
Change Feedback:
Change
00:125 [Pri Vel Fdbk Sel]
to
00:137
[Open Loop Feedback]
Note: Flux vector control with no encoder
used.
Flux Vector
Open Loop
Check
Drive
Integrity
Check
Label 2
Label 1
Change Feedback:
Change
00:125 [Pri Vel Fdbk Sel]
to the
original value (use drive parameter backup).
Example: Port 5 Fdbk 0 (50005)
Label 2
Change Feedback:
Change
00:126 [Pri Vel Fdbk Fltr]
for:
Induction Motor change to 2 (100R/S Noise)
Permanent Magnet Motor change to
0 (190R/S Noise)
Check Primary Feedback:
Check
00:135 [Psn Fdbk Sel]
.
Is the primary feedback device set properly?
Adjust accordingly.
Linear Feedback:
If it is a linear feedback device, set the universal
feedback option module
xx
:25 [FB0 Lin CPR] /
xx
:55
[FB1 Lin CPR]
depending on which feedback is used.
Test and Tune:
Set
00:838 [Psn Reg Ki]
to 1/3 of
00:636 [Speed Reg
BW]
. Execute a small move at low speed, observe
performance, and adjust
00:838 [Psn Reg Ki]
,
00:781
[PTP Accel Time]
,
00:782 [PTP Decel Time]
, and
00:787 [PTP S Curve]
to obtain desired performance.
Position
Loop Check
Flex Vector
Closed
Loop Check
Go to Label 4
and use Note
