ABB Error 50311 — Cannot activate Mechanical Unit in task

ABB 50311 (“Cannot activate Mechanical Unit in task”): “Cannot activate Mechanical Unit in task” is an ABB IRC5 event of major severity.

Updated 2026-10-23 · LogrobotLM reference

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 →