Steady-state simulation to produce motor characteristic 'torque vs slip'.
  asm.torque         motor mechanical torque
  asm.motor.slip     slip (negative: motor, positive: generator mode)
       slip <  -1    motor breake mode
  -1 <  slip <  0     motor drive mode
       slip >  0     generator mode
Plot torque vs slip:
plot 'asm.torque', then right-click 'asm.motor.slip' and choose 'Independent variable': 'asm.motor.slip'.