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FANUC Alarm CPMO-090 — Invalid MainChn ID (G: %d^2)

FANUC CPMO-090 (“Invalid MainChn ID (G: %d^2)”): Internal Error: Main Channel Id is invalid. First check: The system might have been corrupted.

Updated 2026-08-29 · LogrobotLM reference

Description

Internal Error: Main Channel Id is invalid.

Remedy · Remède

The system might have been corrupted. This might have been caused by any of a number of reasons including: Incorrect loading and setup loading incompatible options, mixing software version when adding options and other memory corruption problems. The following is a list of possible remedies:

Frequently asked · Questions fréquentes

What does FANUC alarm CPMO-090 mean?
FANUC CPMO-090 (“Invalid MainChn ID (G: %d^2)”): Internal Error: Main Channel Id is invalid.
How do you troubleshoot FANUC alarm CPMO-090?
The system might have been corrupted. This might have been caused by any of a number of reasons including: Incorrect loading and setup loading incompatible options, mixing software version when adding options and other memory corruption problems. The following is a list of possible remedies:

Related codes / Codes liés

CPMO-086Cycle power: EXT JBFs (G:%d^2)CPMO-087EXT pt.valid.ext=0 (G:%d^2)CPMO-091Invalid JBF MainChn ID (G: %d)CPMO-092JF NewLastAng Mismatch (G: %d^2)

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 →