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FANUC Alarm PALT-121 — WARN Could not read %s

FANUC PALT-121 (“WARN Could not read %s”): Could not read the unitload .dt file - Data error. First check: Check the motet communication and PTPC status.

Updated 2026-08-29 · LogrobotLM reference

Description

Could not read the unitload .dt file - Data error.

Remedy · Remède

Check the motet communication and PTPC status.

Frequently asked · Questions fréquentes

What does FANUC alarm PALT-121 mean?
FANUC PALT-121 (“WARN Could not read %s”): Could not read the unitload .dt file - Data error.
How do you troubleshoot FANUC alarm PALT-121?
Check the motet communication and PTPC status.

Related codes / Codes liés

PALT-118WARN Cannot use MODIFYPALT-119WARN Stn file not loaded or createdPALT-122WARN Cannot go to DETAIL pagePALT-123WARN Data modification disallowed

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 →