ABB Error 31401 — CPU / control board fault
ErrorABB 31401 (“CPU / control board fault”): DMA (Direct Memory Access) memory transfer error on the robot control CPU. Likely part: CPU / Carte Commande (CPU / control board).
Updated 2026-10-22 · LogrobotLM reference
What it means
DMA (Direct Memory Access) memory transfer error on the robot control CPU.
What to check
- Replace the robot control board (robot computer board DSQC).
- Note: Older-generation VME internal bus interface fault.
Part to check / replace
ABB 31401 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
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 →