FANUC Alarm SRVO-023 — SERVO Stop error excess(G:%d A:%d)
FANUC SRVO-023 (“SERVO Stop error excess(G:%d A:%d)”): A excessive servo positional error occurred when the motor stopped. First check: 1. Check whether the applied load exceeds the rating. Likely part: Servo amplifier (Servo amplifier).
Updated 2026-08-29 · LogrobotLM reference
Description
A excessive servo positional error occurred when the motor stopped.
Remedy · Remède
1. Check whether the applied load exceeds the rating. If so, reduce the applied load. If an excessive load is applied, the torque required for acceleration, deceleration, and so forth exceeds the maximum available torque of the motor. Therefore, it might prove impossible to correctly respond to an issued command, resulting in the output of this alarm. 2. Check each interphase voltage of the three-phase voltage (200 VAC) applied to the servo amplifier. If the voltage is found to be 170 VAC or below, check the input power supply voltage. A sub-standard voltage, applied to a servo amplifier, results in a lower-than-normal torque. Therefore, it might prove impossible to correctly respond to an issued command, thus resulting in the output of this alarm. Check phase-to-phase voltage across the three pins of connector CRM38A or CRM38B of the servo amplifier. 3. If the input power supply voltage is found to be 170 VAC or higher, replace the servo amplifier. 4. Check the motor power cables (RM1, RM2, RM3) for damage, to cable or pins, and that the connector is securely connected. WARNING: By completing the next step you will be altering the positional reference for the robot since you are replacing hardware. You must slowly verify all positional data and touch-up any paths or points that have changed. Otherwise, you could injure personnel or damage equipment. 5. Replace the motor, and remaster the robot.
Part to check / replace · Pièce à contrôler / remplacer
FANUC SRVO-023 points to the hardware below — start here before ordering. · SRVO-023 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-023 mean?
- FANUC SRVO-023 (“SERVO Stop error excess(G:%d A:%d)”): A excessive servo positional error occurred when the motor stopped.
- How do you troubleshoot FANUC alarm SRVO-023?
- 1. Check whether the applied load exceeds the rating. If so, reduce the applied load. If an excessive load is applied, the torque required for acceleration, deceleration, and so forth exceeds the maximum available torque of the motor. Therefore, it might prove impossible to correctly respond to an issued command,…
- Which part is involved in FANUC SRVO-023?
- SRVO-023 points to Servo amplifier (Servo amplifier). Confirm the real cause against the robot backup before replacing a part.
Related codes / Codes liés
Same hardware involved / Même matériel en cause
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 →