Siemens SINAMICS S150 NEMA, Operating Instructions Manual

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Functions, monitoring and protective functions
9.3 Drive functions
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
509
WARNING
Unexpected motor movement when identifying the motor
When the motor identification is selected, after commissioning the drive may cause the
motor to move.
• Observe the general safety instructions.
•
Ensure that the EMERGENCY STOP functions are fully functional when commissioning
the drive.
9.3.1.2 Rotating measurement and speed controller optimization
Description
"Rotating measurement" can be activated using p1960 or using p1900 = 1.
The main difference between rotating measurement and standstill measurement is speed
control optimization, with which the drive's moment of inertia is ascertained and speed
controller is set. In addition, the saturation characteristic and rated magnetizing current of
induction motors are measured and so make a significant contribution to improving the
torque accuracy.
If rotating measurement is not to be carried out at the speed set in p1965, this parameter can
be changed before the measurement is started. Higher speeds are recommended.
The same applies to the speed in p1961, at which the saturation characteristic is determined
and the encoder test is carried out.
The speed controller is set to the symmetrical optimum in accordance with dynamic factor
p1967. p1967 must be set before the optimization run and only affects the calculation of the
controller parameters.
If, during the measurement, it becomes clear that the the drive cannot operate in a stable
manner with the specified dynamic factor or that the torque ripples are too great, the
dynamic response is reduced automatically and the result displayed in r1968. The drive must
also be checked to ensure that it is stable across the entire range. The dynamic response
might need to be reduced or Kp/Tn adaptation for the speed controller parameterized
accordingly.
Note
If the dynamic response of the speed controller is reduced excessively because of load
oscillations, the oscillation test can also be deactivated (p1959.4 = 0).