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FANUC Alarm MOTN-183 — Invalid MNUTOOLNUM data array

FANUC MOTN-183 (“Invalid MNUTOOLNUM data array”): The current UTOOL number is not correct. First check: Confirm UTOOL number and retry the operation.

Updated 2026-09-17 · LogrobotLM reference

Description

The current UTOOL number is not correct.

Remedy

Confirm UTOOL number and retry the operation.

Related codes

MOTN-181Robot link Version mismatchMOTN-182Failed to get data from masterMOTN-184Invalid MNUTOOL data arrayMOTN-185Protect of ACK BF to be sent

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 →