EL
ErrorLib
Brands
||
  1. Home
  2. Allen-Bradley
  3. Logix 5000
  4. F01C
About·Privacy·Terms

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.

F01C

Disk file write protected or inaccessible (offline only)

Allen-Bradley · Logix 5000

What does F01C mean?

The disk file is write-protected or otherwise not accessible, specifically when operating offline. This prevents modifications or updates to the file.

Common Causes

  • Disk file is write protected or otherwise not accessible (offline only)

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the current user account has full read/write permissions for the project file and its containing directory.

  2. 2

    Inspect the properties of the project file (.ACD) to ensure the 'Read-only' attribute is unchecked.

  3. 3

    Check the available disk space on the local or network drive hosting the project file.

  4. 4

    Verify network connectivity and proper mapping to the shared location if the project file is stored on a network drive.

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

Related Faults

00D0No block-transfer response (timeout)00D1Checksum mismatch in read response00D2Read/Write request/response mismatch
Source: Logix 5000
Open Manual (Page 165)Search more codes in this manual