Delta AL020 fault code meaning

Delta / AL020

Series: ASDA-A2, ASDA-A2R, ASDA-B2-F, ASDA-B2, ASDA-M

Serial communication timeout

servo drive

Meaning:

Possible causes

Improper timeout parameter setting
No communication command has been received for an extended period. Check the communication cable for loose connections or an open circuit.

Source: ASDA-A2 User Manual (DELTA_IA-ASD_ASDA-A2_UM_SC_20240510) P596; ASDA-A2R User Manual (DELTA_IA-ASD_ASDA-A2R_UM_SC_20200423) P546; ASDA-B2-F User Manual (DELTA_IA-ASDA-B2-F_UM_SC_20180601) P224; ASDA-B2 User Manual (DELTA_IA-ASD_ASDA-B2_UM_SC_20230421) P311; ASDA-M Application Technical Manual (DELTA_IA-ASD_ASDA-M_UM_SC_20180709) P529

Series: ASDA-A2-E

Serial communication timeout

servo drive

Meaning:

Possible causes

Source: ASDA A2-E (EtherCAT) Application Technical Manual (DELTA_IA-ASD_ASDA-A2-E_UM_TC_20221229) P124

Series: ASDA-A3, ASDA-B3, ASDA-E3

Serial communication timeout

servo drive

Meaning: RS-485 communication error.

Possible causes

Condition: RS-485 communication error. Cause:
The Modbus communication timeout setting (P3.004) is incorrect.
The drive has not received a communication command for an extended period (refer to P3.004).

Source: ASDA-A3 User Manual (DELTA_IA-ASD_ASDA-A3_UM_SC_20230515) P1151; ASDA-B3 User Manual (DELTA_IA-ASD_ASDA-B3_UM_SC_20250108) P889; ASDA-E3 (DELTA_IA-ASD_ASDA-E3_UM_SC_20260313) P614

Series: ASDA-E3C-E, ASDA-H3

USB communication timeout

servo drive

Meaning: USB communication error.

Possible causes

Condition: USB communication error. Cause:
The USB communication timeout setting (P3.004) is incorrect.
The drive has not received a communication command for an extended period (refer to P3.004).

Source: ASDA-E3C-E Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-E_UM_SC_20260612) P538; ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P772

Series: ASDA-E3C-L

Serial communication timeout

servo drive

Meaning: RS-485 or RS-232 communication error.

Possible causes

Condition: RS-485 or RS-232 communication error. Cause:
The Modbus communication timeout setting (P3.004) parameter is set incorrectly.
The drive has not received a communication command for an extended period (refer to P3.004).

Source: ASDA-E3C-L Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-L_UM_SC_20260612) P410