Siemens SINAMICS S120 Function Manual page 150

Vector control
4.12 Motor data identification and rotating measurement
Note
To set the new controller setting permanently, the data must be saved in a non-volatile
memory.
Carrying out motor identification
● Enter p1910 > 0. Alarm A07991 is displayed.
● Identification starts when the motor is switched on.
● p1910 resets itself to "0" (successful identification) or fault F07990 is output.
● r0047 displays the current status of the measurement.
Rotating measurement (p1960)
Rotating measurement can be activated via p1960 or p1900 = 1.
The main difference of rotating 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 magnetization current of induction motors are measured.
If the rotating measurement is not to be carried out using 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 for 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, with the specified dynamic factor, the
drive cannot operate in a stable manner or the torque ripples are too large, 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. If necessary, the dynamic
response may have to be reduced or Kp/Tn adaptation for the speed controller
parameterized accordingly.
When commissioning induction machines, you are advised to proceed as follows:
● Before connecting the load, a complete "rotating measurement" (without encoder:
● When the load is connected, speed controller optimization should be repeated because
When permanent-magnet synchronous motors are commissioned, with the load connected,
the speed controller should be optimized (p1960 = 2/4).
150
p1960 = 1; with encoder: p1960 = 2) should be carried out. Since the induction machine
is idling, you can expect highly accurate results regarding the saturation characteristic
and the rated magnetization current.
the total inertia load has changed. This is realized by selecting parameter p1960 (without
encoder: p1960 = 3; with encoder: p1960 = 4).
The saturation characteristic recording is automatically deactivated in parameter p1959
during the speed optimization run.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions