What SAFE TORQUE OFF Is

Many ABB inverters have a feature called Safe Torque Off or STO, but what is it? Safe Torque Off is a function that prevents the inverter from generating torque in the motor. It ensures that no torque generating energy continues to act on the motor and that the motor cannot be re-started until the STO is removed. What this means is that once the Safe Torque Off is activated the motor will not turn after it…