Siemens SINAMICS S120 - Page 144

Performing basic parameterization
6.3 Drive axes
142 Getting Started, 12/2018, 6SL3097-5AG30-0BP0
For synchronous motors, the pole position identification (PolID) determines the electrical
pole position that is required for the field-oriented control. Normally, the electrical pole
position is provided with absolute information by a mechanically adjusted encoder.
Note
The content of the "Rotor position synchronization" screen form depends on the encoder
used.
A PolID is not required for the following encoder properties:
● Absolute encoder (e.g. EnDat, DRIVE-CLiQ encoder)
● Encoder with C/D track and number of pole pairs ≤ 8
● Hall sensor
● Resolver with integer ratio from the number of motor pole pairs to the number of encoder
pole pairs
● Incremental encoder with an integer ratio from the number of motor pole pairs to the
number of encoder pulses
Note
Using the Function Manual
Please also refer to the description of the pole position identification provided in the
"
SINAMICS S120 Function Manual Drive Functions". The supplementary conditions for
using
the individual techniques are also described in the appropriate chapter.
Determining the suitable technique for the pole position identification
WARNING
Danger to life caused by the movement of the motor when measuring unbraked motors
When carrying out the measurement for motors that are not braked, the current that flows
can cause the motor to move, which in turn can lead to death or severe injuries.
• Ensure that nobody is present in the hazardous zone and that the mechanical system
can move freely.
Saturation-based
Motion-based
Elasticity-based
Brake available
Possible Not possible Required
Motor can move freely
Possible
Required
Not possible
Motor has no iron
Not possible
Possible
Possible