ABB B5A0 fault code meaning
ABB / B5A0
Series: ACH531, ACQ531, ACQ580
STO event
drive
Meaning: The run/stop safe torque off function is active, indicating loss of the safety circuit signal connected to connector STO.
Possible causes
Source: ACH531 Firmware Manual P134; ACQ531 Firmware Manual P115; ACQ580 Pump Control Program Firmware Manual P190
Series: ACH580, ACS530
STO event
drive
Meaning: Indicates that the run/stop safe torque off function is active, i.e., loss of the safety circuit signal connected to connector STO.
Possible causes
Source: ACH580 HVAC Control Program Firmware Manual P283; ACS530 Firmware Manual P267
Series: ACS180
STO event
drive
Meaning: STO indicates that the run/stop safe torque off function is active, meaning that the safety circuit signal connected to connector STO has been lost.
Possible causes
Source: ACS180 Machinery Control Program Firmware Manual P319
Series: ACS280, ACS580
STO event
drive
Meaning: STO indicates that the run/stop safe torque off function is active, meaning that the safety circuit signal connected to connector STO has been lost.
Possible causes
Source: ACS280 Firmware Manual P339; ACS580 Standard Control Program Firmware Manual P532
Series: ACS380
STO event
drive
Meaning: Indicates that the run/stop Safe torque off function is activated, meaning that the safety circuit signal connected to connector STO is lost.
Possible causes
Source: ACS380 Machinery Control Program Firmware Manual P435
Series: ACS860
DIL event
drive
Meaning: The ground fault drive interlock function is active, for example due to loss of the safety circuit signal connected to connector XDIL.
Possible causes
Source: ACS860 Basic Control Program Firmware Manual P307
Series: ACS880
STO event
drive
Meaning: Indicates activation of the run/stop safe torque off function, for example due to loss of the safety circuit signal connected to connector XSTO.
Possible causes
Source: ACS880 Basic Control Program Firmware Manual P465
Series: ACS880-MARINE
STO event
drive
Meaning: Indicates that the run/stop Safe Torque Off function is active, for example due to loss of the safety circuit signal connected to connector XSTO.
Possible causes
Source: ACS880 Light Marine P322
Series: ACS880-POS
STO event
drive
Meaning: Indicates that the Safe Torque Off function is enabled during run/stop, meaning that the safety circuit signal connected to the XSTO interface is lost.
Possible causes
Source: ACS880 Position Control Program P453
Series: ACS880-WINCH
STO event
drive
Meaning: Indicates that the Safe Torque Off function is enabled during run/stop, meaning that the safety circuit signal connected to the XSTO interface is lost.
Possible causes
Source: ACS880 Winch Control Program P560