FANUC Alarm SRVO-069 — SERVO CRCERR alarm (Grp:%d Ax:%d)
FANUC SRVO-069 (“SERVO CRCERR alarm (Grp:%d Ax:%d)”): A serial data change occurred during transfer. First check: 1. Check the shielding for the pulse coder cables to ground. Likely part: Pulsecoder (Pulsecoder (motor encoder)).
Updated 2026-08-29 · LogrobotLM reference
Description
A serial data change occurred during transfer.
Remedy · Remède
1. Check the shielding for the pulse coder cables to ground. The ground wire is the yellow and green wire connected to the robot base. 2. Inspect the pulse coder cable set for breaks, internal robot set, and P1 cable running from the robot to the controller. 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. 3. Replace the pulse coder and remaster the robot. 4. Replace the P1 cable. 5. Replace the internal cable set.
Part to check / replace · Pièce à contrôler / remplacer
FANUC SRVO-069 points to the hardware below — start here before ordering. · SRVO-069 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-069 mean?
- FANUC SRVO-069 (“SERVO CRCERR alarm (Grp:%d Ax:%d)”): A serial data change occurred during transfer.
- How do you troubleshoot FANUC alarm SRVO-069?
- 1. Check the shielding for the pulse coder cables to ground. The ground wire is the yellow and green wire connected to the robot base. 2. Inspect the pulse coder cable set for breaks, internal robot set, and P1 cable running from the robot to the controller. WARNING: By completing the next step you will be altering…
- Which part is involved in FANUC SRVO-069?
- SRVO-069 points to Pulsecoder (Pulsecoder (motor encoder)). 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 →