Rockwell Automation Publication 1766-UM001O-EN-P - September 2021 153
Appendix C
Troubleshoot Your System
Understand the Controller
Status Indicators
The MicroLogix 1400 provides three groups of status indicators:
• the LED status indicators on the top of the controller,
• the status indicators on the LCD
• the I/O status indicators on the LCD.
Together they provide a mechanism to determine the current status of the
controller if a programming device is not present or available.
Controller Status Indicators
Figure 67 - Controller Status Indicator Location
Topic Page
Understand the Controller Status Indicators 153
Controller Error Recovery Model 155
Contact Rockwell Automation for Assistance 159
Controller Status Indicators
Status Indicator Color Indicates
POWER
Off No input power, or power error condition
Green Power on
RUN
Off Not executing the user program
Green Executing the user program in run mode
Green flashing Memory module transfer occurring
FAULT
Off No fault detected
Red flashing Application fault detected
Red Controller hardware faulted
FORCE
Off No forces installed
Amber Forces installed
Amber flashing Forces installed in force files but forcing is disabled.
POWER
RUN
FAULT
FORCE
1400
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