184 Rockwell Automation Publication 750-UM006C-EN-P - March 2022
Chapter 6 Troubleshooting
Adequate Performance Notes
1. Drive Integrity Check
a. Is the Motor spinning?
b. Is it the mechanical brake releasing?
c. Is the motor wired correctly?
– Use a megger meter to confirm wiring. Disconnect motor from the
drive and use a megger meter to test the motor and check the
electrical continuity within the motor, this is a special type of
ohmmeter used to measure the electrical resistance of insulators.
2. Flux Vector Open Loop Check should yield a speed regulation of +/-
rpm of set point. If not, determine whether the drive startup procedure
was followed: 00:25 [Motor NP Volts], 00:31 [Motor Poles], 00:75
[Flux Current Ref ], 00:76 [Total Inertia].
a. If 00:76 [Total Inertia] is too high, then the gains might be too high.
00:76 [Total Inertia] and 00:636 [Speed Reg BW] create 00:645
[Speed Reg Kp] / 00:647 [Speed Reg Ki] of the speed loop. Values
that are too high create instability. Look at 00:690 [Limited Tqr
Ref ] and 00:945 [At Limit Status] for instability.
b. Check ratio of 00:75 [Flux Current Ref ] / 00:26 [Motor NP
Amps] (Flux/Motor nameplate current)
– Use this link to refer to Knowledgebase articles
rok.auto/knowledgebase
.
Label 3
Label 4
Steps:
Check the last fault code 00:951 [Last Fault Code].
You must address the fault or change parameter /
program to ignore if possible.
Example: Universal feedback device, change xx:09
[FB0 Loss Cfg] from 2 (Fault Minor) or 3 (FltCoastStop)
to 0 Ignore.
Continue
Continue
Go to Label 3
Go to Adequate
Performance Notes
on page 184.
Attempt to jog
from any start source.
Does it run adequately?
Refer to Note 2
.
Does it run
without faults?
No
No
Yes
Yes
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