AL060 alarm in delta ASDA-A2 servo drive indicates The absolute position is lost. This means the battery is replaced when the main power of the servo drive is off.

1. The battery undervoltage or the failure of power supply, the encoder lost the internal record.
2. Check if the voltage of the battery is lower than 2.8V.
3. Do no change or remove the battery when the power is OFF, which is controlled by the servo drive.