Cause : Excessive Deviation of Position Command comes when the deviation of position command exceeds the allowable setting value. 

AL009 alarm in delta servo drive indicates Excessive Deviation of Position Command. This means the maximum position deviation is set too low.

1. Check the setting value of parameter P2-35 (The warning condition of excessive position deviation).
2. Check if the setting value is appropriate.
3. Check the torque limit value.
4. Check the external load.