Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions - Manual (Page 30)

30 ControlLogix Controller and Memory Board
Publication 1756-IN101L-EN-P - June 2008
Checking the OK Status Indicator
1. Check the color of the OK status indicator.
2. Determine if this is a ControlLogix5555 controller.
If Then Actions
Solid green The controller is OK and its
firmware has been updated. No further actions are required.
However, the revision of firmware
must be compatible with your
version of RSLogix 5000 software.
Flashing red The controller is OK but it requires a
firmware update. Go to Firmware Revisions .
Solid red The memory board of the controller
may not be compatible with the
revision of firmware. Go to the next step.
If Then
No The controller is not operational. Contact your Rockwell
Automation representative or local distributor.
Yes Go to the next step.
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