ControlLogix T07:C41 after replacing controller, what to check?
I'm getting a Major Fault T07:C41 on my ControlLogix controller after replacing the old one. The memory card came from the old controller. What should I check first?
A Major Fault T07:C41 indicates a 'Load Type Mismatch' where the controller failed to load from nonvolatile memory because the project on the memory card was saved for a different controller type. This typically occurs after a controller or memory card replacement. The controller's status display will show 'Major Fault T07:C41'.
Likely causes and checks
1Controller replaced with a different catalog number
- Points to it
- The project on the memory card was saved for the previous controller, which had a different catalog number than the newly installed controller.
- Check
- Compare the catalog number of the installed controller with the controller type specified in the project on the memory card.
2Memory card from another machine
- Points to it
- The memory card was moved or reused from a different system, and the project stored on it is not compatible with the current controller.
- Check
- Confirm which project is on the memory card before attempting to load or overwrite it.
Next check: If the controller catalog number matches the project, ensure the memory card itself is not from a different machine or system. If it is, download the correct project to the controller and store it on the memory card, or replace the controller with one of the correct type.
Related questions
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