Motor nominal speed: 1470 rpm
Slip=1500-1470=30rpm at point of
100% load.
Output freq.= freq. Reference= 50Hz
at load point 0% = 1500 rpm
at load point 100% = 1470 rpm
WITHOUT COMPENSATION
Needed compensation at the point of 100%: 30rpm/1500*50Hz=1Hz
Output freq.=freq.ref+sompensation==51Hz
With the parameter SLIP COMPENSATION are defined a amount of compenastion, e.g. 100=full compensation=1Hz.
The drive itself calculate required compensation based on motor and slip compensation paramemeters.