Delta AL121 fault code meaning
Delta / AL121
Series: ASDA-A3, ASDA-B3, ASDA-E3C-E, ASDA-H3
Error in object dictionary Index that PDO needs to access
servo drive
Meaning:
Possible causes
- When the host controller sends PDO to the drive, the object dictionary Index number specified by PDO is incorrect, preventing the drive from identifying it.
Source: ASDA-A3 User Manual (DELTA_IA-ASD_ASDA-A3_UM_SC_20230515) P1179; ASDA-B3 User Manual (DELTA_IA-ASD_ASDA-B3_UM_SC_20250108) P908; ASDA-E3C-E Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-E_UM_SC_20260612) P556; ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P799
Series: ASDA-E3
Index error when accessing PDO
servo drive
Meaning:
Possible causes
- When the host controller sends PDO to the drive, the object dictionary Index number specified by PDO is incorrect, preventing the drive from identifying it.
Source: ASDA-E3 (DELTA_IA-ASD_ASDA-E3_UM_SC_20260313) P633