Rockwell Automation 1769-L31 CompactLogix Controller Installation Instructions - Manual (Page 26)

26 1769-L31 CompactLogix Controller
Publication 1769-IN069C-EN-P - May 2008
OK Off No power is applied.
Flashing red If the controller is new, the controller requires a firmware update.
If the controller is not new, a major fault occurred.

To clear the fault, either:
 turn the keyswitch from Prog to RUN to PROG.
 go online with RSLogix 5000 software.
Solid red The controller detected a nonrecoverable fault, so it cleared the
project from memory. Follow these steps to recover.
1. Cycle power to the chassis.
2. Download the project.
3. Change to RUN mode.
If the OK status indicator remains solid red, contact your
Rockwell Automation representative or local distributor.
Solid green Controller is OK.
Flashing green The controller is storing or loading a project to or from
nonvolatile memory.
Indicator Status Description