How can I set the "slip" value when I use Asychronous Machine SI units to simulate induction motor

My project is to simulate an induction motor with broken rotor bars. But I don't have much background knowledge of Electrical and Electronics Engineers. I use Asychronous Machine SI Units and a 3-phase programable voltage source to implement an induction machine. But I cannot find any field to set the "slip" value.

By the way, could someone tell me how to implement "full-load" and "half-load"? Could I only change the input load-Torque value like Torque=40 is "full-load" and Torque=20 is "half-load" ?

Thanks a lot in advance!!