Delta AL501 fault code meaning

Series: ASDA-A2-E

STO_A no signal

servo drive

Meaning:

Possible causes

Source: ASDA A2-E (EtherCAT) Application Technical Manual (DELTA_IA-ASD_ASDA-A2-E_UM_TC_20221229) P116

Series: ASDA-A3, ASDA-B3, ASDA-E3C-E, ASDA-H3, ASDA-W3

No SF1 signal (signal lost or error occurred)

servo drive

Meaning:

Possible causes

• The SF1 signal is lost, or the SF1 signal is not synchronized with the SF2 signal and the time difference is 1 seconds or more.

Source: ASDA-A3 User Manual (DELTA_IA-ASD_ASDA-A3_UM_SC_20230515) P1194; ASDA-B3 User Manual (DELTA_IA-ASD_ASDA-B3_UM_SC_20250108) P918; ASDA-E3C-E Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-E_UM_SC_20260612) P565; ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P810; ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P771