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ABB Error 90312 — Safety chain / Axis Computer / Panel Board fault

Error

ABB 90312 (“Safety chain / Axis Computer / Panel Board fault”): Enable 2 Open: the Enable 2 circuit monitoring the Axis Computer is open; the system goes to SYS HALT. Likely part: Chaîne de sécurité / Axis Computer / Panel Board (safety chain / Axis Computer / Panel Board).

Updated 2026-10-22 · LogrobotLM reference

What it means

Enable 2 Open: the Enable 2 circuit monitoring the Axis Computer is open; the system goes to SYS HALT.

What to check

  • Check all connections to the Axis Computer and the safety system cables.
  • Check the continuity of the Enable 2 chain and any connections from a former Multi-Move/slave configuration.
  • Note: Safety chain/hardware link fault. On IRC5 controllers whose configuration has been changed, old slave cabinet wiring can cause Enable 2 to open.

Part to check / replace

ABB 90312 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

90200Limit switch opened by SC90201Limit switch open90202Emergency stop open

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 →