Rockwell Automation 22C PowerFlex 400 AC Drive FRN 1.xx - 7.xx - Manual (Page 141)

Troubleshooting 4-7
PowerFlex 400 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22C-UM001I-EN-P
Drive does not respond to changes in speed command.
Motor and/or drive will not accelerate to commanded speed.
Cause(s) Indication Corrective Action
No value is coming from the
source of the command. The drive “Run” indicator is lit
and output is 0 Hz.
•
Check d301 [Control Source] for
correct source.
•
If the source is an analog input,
check wiring and use a meter to
check for presence of signal.
• Check b002 [Commanded Freq]
to verify correct command.
Incorrect reference source is
being selected via remote
device or digital inputs. None • Check d301 [Control Source] for
correct source.
•
Check d302 [Contrl In Status] to
see if inputs are selecting an
alternate source. Verify settings
for
T051 - T054 [Digital Inx Sel].
•
Check P038 [Speed Reference]
for the source of the speed
reference. Reprogram as
necessary.
•
Review the Speed Reference
Control chart on
page 1-28 .
Cause(s) Indication Corrective Action
Acceleration time is excessive. None Reprogram P039 [Accel Time 1] or
A147 [Accel Time 2].
Excess load or short
acceleration times force the
drive into current limit, slowing
or stopping acceleration. None Compare b003 [Output Current] with
A179 [Current Limit 1].
Remove excess load or reprogram
P039 [Accel Time 1] or A147 [Accel
Time 2].
Check for improper
A170 [Boost
Select] setting.
Speed command source or
value is not as expected. None Verify b002 [Commanded Freq].
Check d301 [Control Source] for the
proper Speed Command.
Programming is preventing the
drive output from exceeding
limiting values. None Check P035 [Maximum Freq] to
insure that speed is not limited by
programming.