For the control of a permanent-magnet synchronous motor, the pole position – the angle between motor phase U and the field axis of the rotor – must be known. The determination of this angle can be done by a so called "Pole Position Identification (PLI)".

In 0x2C00 (P300.00) the motor control type "Sensorless control (SL PSM) [3]" is selected.

The "Pole position identification (PPI) without movement" function is available for the identification of the pole position for the inverter i5xx.