LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

ABB Error 41638 — Not allowed task activation

Error

ABB 41638 (“Not allowed task activation”): “Not allowed task activation” is an ABB IRC5 event of major severity.

Updated 2026-10-23 · LogrobotLM reference

What it means

“Not allowed task activation” is an ABB IRC5 event of major severity.

Related codes

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →