Delta AL411 fault code meaning
Delta / AL411
Series: ASDA-H3
Encoder communication failure
servo drive
Meaning:
Possible causes
- Communication failure with the second encoder RS-485.
Source: ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P809
Series: ASDA-W3
Auxiliary encoder open circuit
servo drive
Meaning: Communication failure with the communication-type auxiliary encoder.
Possible causes
- Condition: Communication failure with the communication-type auxiliary encoder. Cause:
- Incorrect CN2 or CN5 wiring.
- Loose CN2 or CN5 connector.
- Faulty CN2 or CN5 wiring.
- Encoder communication is interrupted by interference.
- Encoder damaged.
- Communication cable too long.
- Error in the backplane or the connector between the drive module and the backplane.
Source: ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P765