Is it possible to RESET STO (Safe Torqe Off) via Comms ?


10 July 2023

STO displayed on HMI is not an error. It is the normal state when motor is in safe stop. 
As soon as we remove STO (by deactivating safety signal), the drive can be started again.

STO cannot be removed by communication, it is against the safety requirements.
As the STO is triggered by STO input , the same principle is used for removing STO.
Dedicated inputs must return back to deactivate STO conditions. That means the drive will self-recover when STOA and STOB are restored. 
To start the motor, new run command must be applied.

ATV600 Safety Function Manual : https://www.se.com/au/en/download/document/EAV64334/