0001
NVRAM Error
Allen-Bradley · MicroLogix 1400 Programmable Controllers
What does 0001 mean?
The default program has been loaded into the controller's memory. This typically happens if power was lost during a program download or transfer from a memory module, or if a RAM integrity test failed. This indicates a potential issue with the controller's non-volatile memory or its power supply.
Common Causes
- Power down occurred during a program download to controller memory.
- Power down occurred during program transfer from a memory module.
- RAM integrity test failed.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Redownload or transfer the program to the controller memory.
- 2
Verify that the battery is connected to the controller.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley MicroLogix 1400 Programmable Controllers