AL302 alarm in delta servo drive indicates the synchronized signal of CANopen is sent too fast. This means the synchronized signal of CANopen is sent too fast.

1. Check if synchronized cycle 0x1006 is the same as the setting of controller. 
2. Check if the setting of P3-09 is reasonable. (It is better to use the default value.) 
3. Ensure the correct time sequence of sending packets from the controller.