LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm PNT2-120 — Pulse coder position compare error

FANUC PNT2-120 (“Pulse coder position compare error”): The feedback velocity exceeds the specification. First check: Refer to the troubleshooting section in the Electrical Connection and Maintenance Manual.

Updated 2026-08-29 · LogrobotLM reference

Description

The feedback velocity exceeds the specification.

Remedy · Remède

Refer to the troubleshooting section in the Electrical Connection and Maintenance Manual.

Frequently asked · Questions fréquentes

What does FANUC alarm PNT2-120 mean?
FANUC PNT2-120 (“Pulse coder position compare error”): The feedback velocity exceeds the specification.
How do you troubleshoot FANUC alarm PNT2-120?
Refer to the troubleshooting section in the Electrical Connection and Maintenance Manual.

Related codes / Codes liés

PNT2-118Motor overheat occurredPNT2-119Pulse coder communication errorPNT2-121Collision Detection (Hand Broke)PNT2-126Operation mode T1 Selected

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 →