ABB Error 0081 — I/O bus fault
ErrorABB 0081 (“I/O bus fault”): Corrupted or erroneous data read from the I/O bus. Likely part: I/O bus (I/O bus).
Updated 2026-10-22 · LogrobotLM reference
What it means
Corrupted or erroneous data read from the I/O bus.
What to check
- Check the I/O logic board and make sure the computer board is mechanically locked in place.
- Note: Replaced by cabinet fieldbus communication faults on IRC5.
Part to check / replace
ABB 0081 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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 →