How to operate ATV71 drive in Torque Control mode.
ATV71 keeps motor torque on given value (TR1 =Aix, bus). While the torque is provided, it keeps speed within the zone defined by range ( FRH+DBP, FRH-DBN), where FRH is speed reference, at the same time.
So, speed will change within given zone and at the same time drive will try to keep requested output torque.
In case of load changes and gets the motor speed out of the defined speed zone range (FRH-DBN , FRH+DBP) somehow (generator or overload mode), the drive switches to speed regulation mode and remains at this limit speed.