Rockwell Automation Publication 20C-PM001F-EN-P - March 2012 79
Troubleshooting Chapter 3
Stopping the Drive Results in a Decel Inhibit Fault
Technical Support Options
Technical Support Wizards
If you are connected to a drive via DriveExplorer™ or DriveExecutive™, you can
run a Tech Support wizard to gather information that will help diagnose
problems with your drive and/or peripheral device. The information gathered by
the wizard is saved as a text file and can be emailed to your remote technical
support contact. (See W h at You Ne e d W h e n Yo u Ca l l Tec h S upp or t
on page 80
for more information.)
To run a Tech Support wizard in DriveExplorer, select Wizards from the Actions
menu. In DriveExecutive, select Wizards from the To o l s menu. Or, click the
button. Follow the prompts to complete the wizard.
Cause(s) Indication Corrective Action
The bus regulation feature is enabled and
is halting deceleration due to excessive
bus voltage. Excess bus voltage is
normally due to excessive regenerated
energy or unstable AC line input voltages.
Internal timer has halted drive operation.
Decel Inhibit fault
screen.
LCD Status Line
indicates “Faulted”.
1. See Attention statement on page page 8
.
2. Reprogram parameters 161/162 to eliminate any
“Adjust Freq” selection.
3. Disable bus regulation (parameters 161 & 162) and
add a dynamic brake.
4. Correct AC input line instability or add an isolation
transformer.
5. Reset drive.
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