Tag: major-fault

All the articles with the tag "major-fault".

• Allen-Bradley CompactLogix Major Fault 0x04 - I/O Configuration Fault Fix

  27 May, 2026

  Diagnose and fix Allen-Bradley CompactLogix major fault 0x04 (I/O Configuration Fault). Covers module identification, electronic keying, backplane issues, and recovery.

• Allen-Bradley CompactLogix Watchdog Timeout 0x08 - Fix Guide

  27 May, 2026

  Diagnose and fix Allen-Bradley CompactLogix major fault 0x08 (watchdog timeout). Covers task optimization, infinite loops, AOI issues, and recovery steps.