Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions - Manual (Page 31)

ControlLogix Controller and Memory Board 31
Publication 1756-IN101L-EN-P - June 2008
3. Determine if the memory board has been replaced with a memory
board with a different catalog number.
For example, did you replace a 1756-M13 memory board with a
1756-M23 memory board?
4. Reinstall the previous memory board.
5. Update the firmware of the controller to a revision that is compatible
with the memory board that you intend to install.
See Firmware Revisions .
6. Install the new memory board.
7. Determine the color of the OK status indicator.
If Then
No The controller is not operational. Contact your Rockwell
Automation representative or local distributor.
Yes Go to the next step.
If Then
Solid green No further actions are required. However, the revision of
firmware must be compatible with your version of RSLogix 5000
software.
Solid red The controller is not operational. Contact your Rockwell
Automation representative or local distributor.