Delta AL470 fault code meaning

Delta / AL470

Series: ASDA-W3

Auxiliary encoder read/write incomplete warning

servo drive

Meaning: When the drive issues a read/write command program to the encoder, the encoder does not respond within the specified time, causing the program to time out and terminate before completion.

Possible causes

Condition: When the drive issues a read/write command program to the encoder, the encoder does not respond within the specified time, causing the program to time out and terminate before completion. Cause:
Loose encoder wiring or poor contact causes a momentary encoder communication error.
A source of interference causes a momentary encoder communication error.
Encoder error: No response.

Source: ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P769