LogrobotLM

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FANUC Alarm SRVO-066 — SERVO CSAL alarm(Group:%d Axis:%d)

FANUC SRVO-066 (“SERVO CSAL alarm(Group:%d Axis:%d)”): The pulse coder ROM checksum data is abnormal. First check: If this alarm occurs along with a SRVO-068 DTERR, SRVO-069 CRCERR, or SRVO070 STBERR, disregard this alarm and refer to the other three alarm remedies. Likely part: Pulsecoder (Pulsecoder (motor encoder)).

Updated 2026-08-29 · LogrobotLM reference

Description

The pulse coder ROM checksum data is abnormal.

Remedy · Remède

If this alarm occurs along with a SRVO-068 DTERR, SRVO-069 CRCERR, or SRVO070 STBERR, disregard this alarm and refer to the other three alarm remedies. Replace the pulse coder or motor and master the robot.

Part to check / replace · Pièce à contrôler / remplacer

FANUC SRVO-066 points to the hardware below — start here before ordering. · SRVO-066 met en cause l'organe ci-dessous : commencez par là.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering. · Touchez une pièce pour tous les codes qui la citent ; vérifiez la variante exacte avant commande.

Frequently asked · Questions fréquentes

What does FANUC alarm SRVO-066 mean?
FANUC SRVO-066 (“SERVO CSAL alarm(Group:%d Axis:%d)”): The pulse coder ROM checksum data is abnormal.
How do you troubleshoot FANUC alarm SRVO-066?
If this alarm occurs along with a SRVO-068 DTERR, SRVO-069 CRCERR, or SRVO070 STBERR, disregard this alarm and refer to the other three alarm remedies. Replace the pulse coder or motor and master the robot.
Which part is involved in FANUC SRVO-066?
SRVO-066 points to Pulsecoder (Pulsecoder (motor encoder)). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

SRVO-064SERVO PHAL alarm(Group:%d Axis:%d)SRVO-065WARN BLAL alarm(Group:%d Axis:%d)SRVO-067SERVO OHAL2 alarm (Grp:%d Ax:%d)SRVO-068SERVO DTERR alarm (Grp:%d Ax:%d)

Same hardware involved / Même matériel en cause

SRVO-038PulsecoderSRVO-061PulsecoderSRVO-063PulsecoderSRVO-069Pulsecoder

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 →