ATS soft starter range, acceleration time terminology is referred to as “Rise time of starter torque between 0 and
nominal value of torque Tn”. It means for set value of acceleration time, motor nominal torque will be reached.
Acceleration time setting is torque ramp gradient.

Motor acceleration with set numeric value of ACC doesn't mean motor will start during this period but  the start duration
depends on the load, on the current limitation, on the control mode (Torque control mode or voltage control mode).