ABB Error 90781 — Safe Local I/O GPIO input is unstable

ABB 90781 (“Safe Local I/O GPIO input is unstable”): “Safe Local I/O GPIO input is unstable” 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 →