Check the ok led – Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions Manuel d'utilisation
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