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FANUC Alarm COPT-021 — WARN Send_PC event parm %s error

FANUC COPT-021 (“WARN Send_PC event parm %s error”): A Send to PC MACRO was called with a parameter that is illegal. First check: Check the MACRO call in the TP program.

Updated 2026-08-29 · LogrobotLM reference

Description

A Send to PC MACRO was called with a parameter that is illegal. The parameter is uninitialized or the wrong data type.

Remedy · Remède

Check the MACRO call in the TP program.

Frequently asked · Questions fréquentes

What does FANUC alarm COPT-021 mean?
FANUC COPT-021 (“WARN Send_PC event parm %s error”): A Send to PC MACRO was called with a parameter that is illegal. The parameter is uninitialized or the wrong data type.
How do you troubleshoot FANUC alarm COPT-021?
Check the MACRO call in the TP program.

Related codes / Codes liés

COPT-011WARN Send_PC Buffer too big for packetCOPT-020WARN Send_PC builtin failedCOPT-022WARN Still waiting for %sCOPT-023WARN Abort wait for %s

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 →