Delta AL21B fault code meaning
Delta / AL21B
Series: ASDA-A3, ASDA-H3
Secondary platform - Memory stack out of range
servo drive
Meaning: The configured memory position is out of range when stack control instructions are used.
Possible causes
- Condition: The configured memory position is out of range when stack control instructions are used. Cause: Incorrect use of secondary platform program instructions.
Source: ASDA-A3 User Manual (DELTA_IA-ASD_ASDA-A3_UM_SC_20230515) P1184; ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P803