Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions - Manuel (Page 27)

ControlLogix® Controller and Memory Board 27
Publication 1756-IN101J-EN-P - November 2004
Check the OK LED
1. What color is the OK LED?
2. Is this 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
revision of RSLogix 5000 software.
flashing red The controller is OK but it requires a
firmware update. Go to “Determine Which Firmware
Revisions to Use” on page 10.
solid red The memory board of the controller
may not be compatible with the
revision of firmware. Go to step 2.
If: Then:
No The controller is not operational. Contact your Rockwell
Automation representative or local distributor.
Yes Go to step 3.
42525
OK LED