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ABB Error 516 — Welding fault

Warning

ABB 516 (“Welding fault”): This code comes in 3 variants (S2/S3). Likely part: Sécurité (safety).

Updated 2026-10-22 · LogrobotLM reference

What it means

This code comes in 3 variants (S2/S3). Main case: Adjustment logic fault: welding not executed or number modified.

What to check

  • Wait until the welding operation is complete.
  • Try again.
  • Note: Legacy welding process logic fault.

Part to check / replace

ABB 516 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

508Floppy disk drive fault509Axis / resolver fault510CPU / PROM fault

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 →