Rockwell Automation 20L PowerFlex 700L Frame 1X Liquid-Cooled Adjustable Frequency AC Drive - Manual (Page 49)

PowerFlex 700L Frame 1X Drive Installation Instructions – Publication 20L-IN013A-EN-P – June 2009
49
Drive does not respond to changes in speed command.
Motor and/or drive will not accelerate to commanded speed.
Motor operation is unstable.
Cause(s) Indication Corrective Action
No value is coming from the source of
the command. LCD HIM Status Line
indicates “At Speed”
and output is 0 Hz. 1. If the source is an analog input,
check wiring and use a meter to
check for presence of signal.
2. Check Parameter 002
[Commanded Speed] for correct
source.
Incorrect reference source has been
programmed. None 3. Check Parameter 213 [Speed Ref
Source] for the source of the
speed reference.
4. Reprogram Parameter 090
[Speed Ref A Sel] for correct
source.
Incorrect Reference source is being
selected via remote device or digital
inputs. None 5. Check Parameter 209 [Drive
Status 1], bits 12 and 13 for
unexpected source selections.
6. Check Parameter 216 [Dig In
Status] to see if inputs are
selecting an alternate source.
7. Reprogram digital input
Parameters 361…366 to correct
“Speed Sel x” option.
Cause(s) Indication Corrective Action
Acceleration time is excessive. None Reprogram Parameter 140/141 [Accel
Time x].
Excess load or short acceleration
times force the drive into current limit,
slowing or stopping acceleration. None Check Parameter 210 [Drive Status 2]
bit 10 to see if the drive is in Current
Limit.
Remove excess load or reprogram
Parameter 140/141 [Accel Time x].
Speed command source or value is not
as expected. None Check for the proper Speed
Command using Steps 1 through 7
above.
Programming is preventing the drive
output from exceeding limiting values. None Check Parameters 082 [Maximum
Speed] and 055 [Maximum Freq] to
assure that speed is not limited by
programming.
Cause(s) Indication Corrective Action
Motor data was incorrectly entered or
Autotune was not performed. None 1. Correctly enter motor nameplate
data.
2. Perform “Static” or “Rotate”
Autotune procedure.