ABB Error 0102 — CPU / EPROM fault
ErrorABB 0102 (“CPU / EPROM fault”): PROM checksum error on the I/O computer board. Likely part: CPU / EPROM (CPU / EPROM).
Updated 2026-10-22 · LogrobotLM reference
What it means
PROM checksum error on the I/O computer board.
What to check
- A Replace the EPROMs on the control board.
- B Replace the main computer board.
- Note: Will become PROM error 31601/31602 on S4 and damaged flash on IRC5.
Part to check / replace
ABB 0102 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 →