ControlLogix L7x T07:C40: Store Failed after download, what to check?
I'm getting a Major Fault Type 7 Code 40 (Store Failed) on my ControlLogix L7x controller. This happens right after I download a project with the 'store-to-nonvolatile-memory' option selected. What should I check first?
A Type 7 Code 40 fault on a ControlLogix controller indicates that storing the project to the nonvolatile memory card failed. This can occur during a project store operation or after a download with the store-to-nonvolatile-memory option enabled. The primary causes are a locked or failed memory card.
Likely causes and checks
1Memory card locked
- Points to it
- On 1756-L7x controllers, the memory card has a physical lock switch. If this switch is in the locked position, the controller cannot write to the card, causing the store operation to fail immediately.
- Check
- Verify the memory card's lock switch is in the unlocked position.
2Memory card failed or worn
- Points to it
- The memory card itself might be faulty, worn out, or incompatible if it's an old card or from another system. This can lead to repeated store failures.
- Check
- Try the store operation again. If it fails a second time, replace the memory card with a Rockwell-approved one.
Next check: After checking the memory card's lock switch and retrying the store, if the fault persists, consider replacing the memory card. Ensure the new card is Rockwell-approved.
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