Delta AL0A7 fault code meaning
Delta / AL0A7
Series: ASDA-H3
Communication error between the power module and drive module
servo drive
Meaning: Communication error between the power module and drive module.
Possible causes
- Condition: Communication error between the power module and drive module. Cause:
- The wiring between the power module and drive module is open.
- Interference causes a communication error.
- Drive module internal communication master setting error.
- Incorrect setting of the station number rotary switch on the front of the power supply module.
- More than two power supply modules are connected in series via CN3.
Source: ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P797
Series: ASDA-W3
Communication error between power supply module (PM) and control module (CM)
servo drive
Meaning: Communication error between the power supply module and the control module.
Possible causes
- Condition: Communication error between the power supply module and the control module. Cause:
- Interference causes a communication error.
- The connection between the power supply module or control module and the backplane is loose.
- The backplane is damaged.
Source: ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P755