FANUC Alarm ARC-039 — STOPL … AO is not scaled

Manufacturer wording — STOPL %s^1 AO[%d^2] is not scaled (%s^4,%d^5)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ARC-039 (“STOPL … AO is not scaled”): The named weld analog output signal is not scaled properly. First check: Adjust the weld analog output scaling in the Weld I/O screen using the CONFIG function key.

Updated 2026-09-17 · LogrobotLM reference

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 →