AL201 alarm in delta servo drive indicates an error occurs when loading CANopen data. This means there is an issue in loading CANopen data.

1. If the alarm is cleared when cycling power on the servo drive, it means the data error occurs instantaneously when accessing in the previous time.
2. If the error still exists after cycling power on the servo drive, it means the data in EEPROM is damaged. It has to enter the correct value again.