Siemens SINAMICS G130 - Page 381

Functions, monitoring, and protective functions
9.2 Drive functions
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
381
When commissioning induction machines, you are advised to proceed as follows:
● Before connecting the load, a complete "rotating measurement" (without encoder: p1960
= 1; with encoder: p1960 = 2) should be carried out. Since the induction machine is idling,
you can expect highly accurate results for the saturation characteristic and the rated
magnetization current.
● When the load is connected, speed controller optimization should be repeated because
the total moment of inertia 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 tuning run.
When permanent-magnet synchronous motors are commissioned, the speed controller
should be tuned (p1900 = 3 or p1960 > 0) when the load is connected.
Carrying out the rotating measurement (p1960 > 0)
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.
● Only for induction motors:
– Measurement of the magnetization characteristic (p0362 to p0369)
– Measurement of the magnetization current (p0320) and determination of the offset
voltage of the converter for offset compensation
– Measurement of the saturation of the leakage inductance and setting of the current
controller adaptation (p0391 to p0393)
This is automatically activated with 1LA1 and 1LA8 motors (p0300 = 11, 18) (see
p1959.5).
● Speed controller optimization
– p1470 and p1472, when p1960 = 1 (operation without encoder)
– p1460 and p1462, when p1960 = 2 (operation with encoder)
– Kp adaptation switch-off
● Acceleration pre-control setting (p1496)
● Setting for ratio between the total moment of inertia and that of the motor (p0342)
Note
Non-volatile saving
To set the new controller setting permanently, the data must be saved with p0977 or p0971
in a non
-volatile memory.