ABB Error 71177 — No response from I/O unit
ErrorABB 71177 (“No response from I/O unit”): “No response from I/O unit” is an ABB IRC5 event of major severity.
Updated 2026-10-23 · LogrobotLM reference
What it means
“No response from I/O unit” 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 →