Delta AL820 fault code meaning

Delta / AL820

Series: ASDA-W3

Drive module (DM) configuration change

servo drive

Meaning:

Possible causes

The number of drive modules differs from that at the previous power-on.
The drive module installation order differs from that at the previous power-on.

Source: ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P776