Siemens SINAMICS S120, Function Manual

Page: 255 / 1094

Vector control
5.13 Motor data identification and rotating measurement
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
255
Rotating measurement (p1960 > 0): Sequence
The following measurements are carried out when the enable signals are set and a switch-
on command is issued in accordance with the settings in p1959 and p1960.
● Encoder test
If a speed encoder is used, the direction of rotation and the pulse number are checked.
● Induction motors only:
–
Measurement of the saturation characteristic (p0362 to p0369)
– Measurement of the magnetizing current (p0320) and determination of the offset
voltage of the converter for offset compensation
– Measurement of the saturation of the leakage inductance, for induction motors, and
setting of the current controller adaptation (p0391…p0393)
This measurement is automatically activated with 1LA1 and 1LA8 motors (p0300 = 11,
18) (see p1959.5).
● Speed controller tuning
–
p1470 and p1472, when p1960 = 1 (operation without encoder)
– p1460 and p1462, when p1960 = 2 (operation with encoder)
– Setting the Kp adaptation
● Acceleration precontrol setting (p1496, p1517)
● Setting for ratio between the total moment of inertia and that of the motor (p0342)
Note
To set the new controller setting permanently, the data must be saved in a non-volatile
memory.
WARNING
Unexpected motor motion during motor data identification
Motor movement caused when optimizing the speed controller can result in death, severe
injury or material damage.
• Ensure that nobody is in the hazardous zone - and that the mechanical system can
freely move.
Note
If speed controller tuning is used for operation with encoder, then the closed-loop control
operating mode is automatically changed over to closed-loop speed control without encoder,
so that the encoder test can be carried out.