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FANUC Alarm CPMO-064 — MAINCHN is Unknown (G: %d^2)

FANUC CPMO-064 (“MAINCHN is Unknown (G: %d^2)”): Internal Error: Main Channel is neither JBF nor JF First check: Press RESET.

Updated 2026-08-29 · LogrobotLM reference

Description

Internal Error: Main Channel is neither JBF nor JF

Remedy · Remède

Press RESET. If the error is not cleared, document the events that led to the error and call your FANUC or FANUC

Frequently asked · Questions fréquentes

What does FANUC alarm CPMO-064 mean?
FANUC CPMO-064 (“MAINCHN is Unknown (G: %d^2)”): Internal Error: Main Channel is neither JBF nor JF
How do you troubleshoot FANUC alarm CPMO-064?
Press RESET. If the error is not cleared, document the events that led to the error and call your FANUC or FANUC

Related codes / Codes liés

CPMO-062Cycle power: RSINFOs (G: %d^2)CPMO-063MAINCHN is NULL (G: %d^2)CPMO-065Need Abort:GmSTOPPOS MisSynCPMO-066Need Abort:GmRSType MisSyn

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 →