ABB Error 90200 — Limit switch opened by SC
ErrorABB 90200 (“Limit switch opened by SC”): Limit switch opened by SC: the robot limit switch has been opened by the Safety Controller following a safety violation. Likely part: Fin de course / Contactor Board / Safety Controller (Fin de course / Contactor Board / Safety Controller).
Updated 2026-10-22 · LogrobotLM reference
What it means
Limit switch opened by SC: the robot limit switch has been opened by the Safety Controller following a safety violation. The system goes to the Guard stop state.
What to check
- Look for the actual violation in the other messages in the log — 90200 is only the consequence.
- Check the cable between the contactor board and the Safety Controller.
- Perform a Confirm Stop by pressing the Motors ON button or by activating the corresponding system input.
- Note: Head of the 902xx "... opened by SC" block. Always read the preceding events: the SC opens on command, it is almost never the fault.
Part to check / replace
ABB 90200 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 →