ABB 0021 fault code meaning

ABB / 0021

Series: ACL30

Safe torque off function activated

drive

Meaning: The safe torque off function is active, i.e., safety circuit signal 1 for the connection between X6:1 and X6:3 is lost, while the drive is stopped and parameter 46.05 STO DIAGNOSTIC is set to Alarm or No.

Possible causes

Source: ACL30 Elevator Drive User Manual P277

Series: ACS310, ACS350

Current measurement

drive

Meaning: Internal drive fault.

Possible causes

Source: ACS310 User Manual P297; ACS350 User Manual P252

Series: ACS355

Internal drive fault

drive

Meaning: Internal drive fault.

Possible causes

Source: ACS355 User Manual P345