LogrobotLM

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FANUC Alarm LNTK-027 — STOP Invalid data on LNTK stack

FANUC LNTK-027 (“STOP Invalid data on LNTK stack”): Invalid data was found on the tracking stack. First check: Perform a COLD start of the system.

Updated 2026-08-29 · LogrobotLM reference

Description

Invalid data was found on the tracking stack.

Remedy · Remède

Perform a COLD start of the system. (Cycle power.) Notify FANUC Robotics if problem persists.

Frequently asked · Questions fréquentes

What does FANUC alarm LNTK-027 mean?
FANUC LNTK-027 (“STOP Invalid data on LNTK stack”): Invalid data was found on the tracking stack.
How do you troubleshoot FANUC alarm LNTK-027?
Perform a COLD start of the system. (Cycle power.) Notify FANUC Robotics if problem persists.

Related codes / Codes liés

LNTK-025STOP Illegal encoder multiplierLNTK-026STOP Encoder not enabledLNTK-028STOP LNTK stack underflowLNTK-029STOP LNTK stack overflow

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →