Siemens SINAMICS S120 Function Manual page 147

If a permanent-magnet synchronous motor is being used (p0300 = 2), then with p1900 > 1,
the encoder adjustment (p1990 = 1) is automatically activated. The technique used can be
set in p1980.
Parameter p1960 is set depending on p1300:
● p1960 = 1, when p1300 = 20 or 22 (without encoder)
● p1960 = 2, when p1300 = 21 or 23 (with encoder)
The measurements, parameterized using p1900 are started in the following sequence after
the drive has been enabled:
● Standstill (static) measurement - after the measurement has been completed, the pulses
● Encoder adjustment - after the measurement has been completed, the pulses are
● Rotating measurement - after the measurement has been completed, the pulses are
● After all of the measurements, activated using p1900 have been successfully completed,
Motor identification (p1910)
Motor identification with p1910 is used for determining the motor parameters at standstill
(see also p1960: speed controller optimization):
● Equivalent circuit diagram data p1910 = 1
● Magnetization characteristic p1910 = 3
For control engineering reasons, you are strongly advised to carry out motor identification
because the equivalent circuit diagram data, motor cable resistance, IGBT on-state voltage,
and compensation for the IGBT lockout time can only be estimated if the data on the rating
plate is used. For this reason, the stator resistance for the stability of sensorless vector
control or for the voltage boost in the V/f curve is very important. Motor data identification is
essential if long supply cables or third-party motors are used. When motor data identification
is started for the first time, the following data are determined with p1910 on the basis of the
data on the rating plate:
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
are inhibited and parameter p1910 is reset to 0.
inhibited and parameter p1990 is reset to 0.
inhibited and parameter p1960 is reset to 0.
then this is set to 0.
Note
To set the new controller setting permanently, the data must be saved in a non-volatile
memory (see also "Parameters").
Completion of the individual identification runs can be read via parameters r3925 to
r3928.
The identification runs influence only the current valid motor data set (MDS).
DANGER
During motor identification, the drive may cause the motor to move.
The emergency OFF functions must be fully operational during commissioning. To
protect the machines and personnel, the relevant safety regulations must be observed.
4.12 Motor data identification and rotating measurement
Vector control
147