Siemens SINAMICS V90 Operating Instructions Manual page 258

Tuning
9.4 Real-time auto tuning
Note
The real-time auto tuning may not be performed properly if the following conditions are not
satisfied:
• Accelerate the motor for 100 ms or more with the acceleration torque.
• The acceleration/deceleration torque is 15% or more of the rated torque.
Under operating conditions that impose sudden disturbance torque during
acceleration/deceleration or on a machine that its rigidity is poor, auto tuning may not
function properly, either. In such cases, use the one-button auto tuning or manual tuning to
optimize the drive.
258
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2015, A5E36037884