User manual

Publication 1768-UM001C-EN-P - November 2007
Status Indicators 121
I/O PWR Off Either the controller or the power
supply is not operating properly.
To recover from this fault, perform this procedure.
1. Make sure all modules in the system are installed properly and
fully engaged with each other.
a. If the controller PWR status indicator remains off, proceed to
the next step.
2. Disconnect any 1768 communication or motion modules from
the system.
3. Reinstall the controller directly next to the power supply and
reapply power.
4. If the controller PWR status indicator remains off, replace the
controller.
5. If the controller PWR status indicator on the new controller
remains off, replace the power supply.
Steady
green
The controller is sending power to the
1768 modules as it should.
Normal Operation - No action is required.
Steady red • The controller needs to be replaced.
• If 1768 communication and motion
modules are installed in the system,
one of the 1768 modules needs to
be replaced.
Perform this procedure.
1. Disconnect all of the 1768 communication and motion modules
from the system.
2. Reapply power.
3. Check the controller PWR status indicator.
a. If the status indicator is green, the controller is operating
properly and one of the other 1768 modules needs to be
replaced.
b. To troubleshoot the 1768 modules, see their respective
installation instructions.
c. If the status indicator remains red, replace the controller.
CompactLogix Controller Status Indicators
Indicator Condition Interpretation Recommended Actions