SV1053 Overload Protection (Beta i-Series) fault in Fanuc drive

SV1053 Overload Protection (Beta i-Series) fault in Fanuc drive

Description

SV1053 is an overload alarm specific to the Beta i-Series servo drives. These are cost-effective, compact drives often used for tool changers or auxiliary axes. The alarm functions similarly to the Alpha series OVC (Overcurrent) alarm but uses the Beta series specific detection logic. It indicates that the calculated thermal load on the motor or the drive's transistor module has exceeded the safe curve.

Cause

• Mechanical Bind: Tool changer arm is bent or jammed with chips.
• Brake Failure: The brake on the auxiliary motor is not releasing.
• Parameter: The Beta series drives have very specific parameter settings for "Duty Cycle." If these are not tuned to the machine's actual mass, the alarm trips prematurely.

Solution

1. Check Mechanism: Beta motors are often used in "hidden" areas (magazine, pallet changer). Visually inspect these areas for jams.
2. Check Input Voltage: Beta drives are often more sensitive to input voltage fluctuations than Alpha drives. Ensure stable 200VAC.
3. Cooling: Beta drives often lack internal fans. Ensure the cabinet airflow is sufficient to cool the drive's heatsink.