Rotating Measurement - Siemens SINAMICS S120 Function Manual

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Vector control

6.13 Motor data identification and rotating measurement

To set the new controller setting permanently, the data must be saved in a non-volatile memory.

At the end of the motor data identification, all dependent control parameters are calculated

automatically (p0340 = 3)

To perform the motor data identification, proceed as follows:

1. Activate motor data identification with p1900 = 2 (or p1910 = 1).

Alarm A07991 is displayed.

2. Motor data identification starts the next time that the motor is switched on.

3. After a successful motor data identification, parameter p1900 (or p1910) is reset to "0".

If the identification was not successful, then instead, fault F07990 is output.

4. Parameter r0047 indicates the actual status of the measurement or identification.

Measurement without automatic adaptation of the control parameters (p1909.17)

p1909.17 = 1 can be used, for example, to measure the motor parameters after a motor

replacement, without automatically adapting the control parameters via p0340.

Rotating measurement

● The "Rotating measurement" function is only performed after the motor data identification

Function description

The "Rotating measurement" function can be activated via p1960 or p1900 = 3.

The function contains a speed control tuning with which the drive's moment of inertia is

ascertained and the 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 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.

For induction motors, a similar approach applies for the speed in p1961, at which the saturation

characteristic is determined and the encoder test is carried out.

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Drive functions