ABB Error 31108 — Serial link RS232 fault
ErrorABB 31108 (“Serial link RS232 fault”): Frame communication error on the serial channel of the I/O computer. Likely part: Liaison Série RS232 (serial link RS232).
Updated 2026-10-22 · LogrobotLM reference
What it means
Frame communication error on the serial channel of the I/O computer.
What to check
- Check the speed/frame parameters.
- Replace the robot computer board.
- Note: Equivalent to the noisy serial port error (71400) on IRC5.
Part to check / replace
ABB 31108 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 →