Rotating Measurement And Speed Controller Optimization - Siemens SINAMICS G150 Operating Instructions Manual

Functions, Monitoring, and Protective Functions
9.2 Drive Functions
During motor identification, the drive might set the motor in motion.
The EMERGENCY OFF functions must be fully operational during commissioning. To
protect the machines and personnel, the relevant safety regulations must be observed.
9.2.1.2

Rotating measurement and speed controller optimization

Description
"Rotating measurement" can be activated via p1960 or p1900 = 1.
The main difference between rotating measurement and standstill measurement is speed
control optimization, with which the drive's moment of inertia is ascertained and speed
controller is set. On induction motors, the saturation characteristic and rated magnetization
current are also measured.
If rotating measurement is not to be carried out at the speed set in p1965, this parameter can
be changed before the measurement is started. Higher speeds are recommended.
The same applies to the speed in p1961, at which the saturation characteristic is determined
and the encoder test is carried out.
The speed controller is set to the symmetrical optimum in accordance with dynamic factor
p1967. p1967 must be set before the optimization run and only affects the calculation of the
controller parameters.
If, during the measurement, it becomes clear that the the drive cannot operate in a stable
manner with the specified dynamic factor or that the torque ripples are too great, the
dynamic response is reduced automatically and the result displayed in r1968. The drive must
also be checked to ensure that it is stable across the entire range. The dynamic response
might need to be reduced or Kp/Tn adaptation for the speed controller parameterized
accordingly.
When commissioning induction machines, you are advised to proceed as follows:
● Before connecting the load, a complete "rotating measurement" (without encoder: p1960
● When the load is connected, speed controller optimization should be repeated because
When permanent-magnet synchronous motors are commissioned, the speed controller
should be optimized (p1960 = 2/4) when the load is connected.
424
WARNING
= 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.
the total moment of inertia has changed. This is realized by selecting parameter p1960
(without encoder: p1960 = 3; with encoder: p1960 = 4).
During the speed optimization, the saturation characteristic recording is automatically
deactivated in parameter p1959.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A