Supplementary Conditions - Siemens SINAMICS S120 Function Manual

Note
Use default setting
When using standard Siemens motors, the automatically pre-selected setting should be kept.
Determining the suitable method
On the basis of the following table, you can determine the PolID methods that are suitable for
your drive:
Brake available
Motor can move freely
Motor has no iron
Selecting a method
Uncontrolled motor motion as a result of an incorrect control sense of the speed control loop
If a PolID is used to determine the commutation angle, then the commutation angle must be
redetermined each time the control sense is changed. An incorrect commutation angle can
lead to uncontrollable motor movement - and therefore result in death or severe injury.
● Check the commutation angle offset (F7966) after an actual value inversion, and when
The relevant technique can be selected via parameter p1980. The following techniques are
available for pole position identification (PolID):
● Saturation-based 1st + 2nd harmonics (p1980 = 0)
● Saturation-based 1st harmonic (p1980 = 1)
● Saturation-based, two-stage (p1980 = 4)
● Motion-based (p1980 = 10)
● Elasticity-based (p1980 = 20)
Please also observe the list of relevant parameters in Chapter "Important parameters (process-
dependent) (Page 155)".
5.16.1

Supplementary conditions

Supplementary conditions
When selecting a suitable method for PolID, you must observe the following information and
supplementary conditions.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Saturation-based
Possible
Possible
Not possible
WARNING
necessary redetermine the offset (p1990 = 1).
5.16 Pole position identification
Motion-based
Not possible
Required
Possible
Servo control
Elasticity-based
Required
Not possible
Possible
151