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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

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. 1

    Redownload or transfer the program to the controller memory.

  2. 2

    Verify that the battery is connected to the controller.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

-1Output Error-2Overlap Error-3Undefined Accel/Decel
Source: Allen-Bradley MicroLogix 1400 Programmable Controllers
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