LogrobotLM

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FANUC Alarm LNTK-021 — STOP Invalid track axis number

FANUC LNTK-021 (“STOP Invalid track axis number”): An invalid or uninitialized track axis number (specified by First check: Make sure that this value is properly set to one of the valid values listed under the description for this system variable.

Updated 2026-09-17 · LogrobotLM reference

Description

An invalid or uninitialized track axis number (specified by

Remedy

Make sure that this value is properly set to one of the valid values listed under the description for this system variable.

Related codes

LNTK-019STOP Invalid scale factorLNTK-020STOP Invalid extreme positionLNTK-022STOP No tracking hardwareLNTK-023STOP Bad tracking hardware

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 →