Motor Data Identification - Siemens Sinamics S120 Function Manual

3.12

Motor data identification

Description
The motor data identification (MotID) is used as tool to determine the motor data, e.g. of
third-party motors and can help to improve the torque accuracy (k
system must have been commissioned for the first time as basis for using motor data
identification. To do this, either the electrical motor data (motor data sheet) or the rating plate
data must be entered and the calculation of the motor/control parameters (p0340) must have
been completed.
Commissioning involves the following steps:
1. Enter the motor data or the rating plate data and the encoder data
2. Complete calculation of the motor and control data as starting value for the motor data
3. Carry out a static measurement (p1910)
4. For synchronous motors: Carry out an angular commutation calibration (p1990) and if
5. Carry out a rotating measurement (p1960)
Note
Completion of the individual identification runs can be read via parameters r3925 to r3928.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
identification (p0340 = 3, if motor data, p0340 = 1, if rating plate data were entered)
required, fine synchronization by passing the zero mark (refer to r1992). Absolute
encoders do not have to be finely synchronized. For fine synchronization, also refer to
Chapter "Pole position identification" under "pole position correction with zero marks".
Before starting the rotating measurement, the speed controller setting should be checked
and optimized (p1460, p1462 and p1470, p1472).
It is preferable if the rotating motor data identification is carried out with the motor de-
coupled from the mechanical system. This therefore means that only the motor moment
of inertia is determined. The total moment of inertia with mechanical system can be
subsequently identified with p1959 = 4 and p1960 = 1. The stress on the mechanical
system can be reduced by parameterizing the ramp-up time (p1958), using direction
limiting (p1959.14/p1959.15) or using the current and speed limit. The higher the selected
ramp-up time, the less accurate the moment of inertia determined.
Servo control
3.12 Motor data identification
estimator). The drive
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