S120 homing with sin/cos encoder

Hi all 

I have a project with an S120 CU310-2 PN drive, a 1FK7 motor equipped with a sin/cos encoder and an SMC20. For information I program with technological objects in position axis. How can I do a referencing using overtorque detection?

I have already made a test without success with the "MC_Torquelimiting" block with the mode setting at 1. I do not know why but when I activate the block with the "Enable" input, the axis is immediately blocked with the output "InClamping" on True. Except that the torque value never exceeds the limit (0.1 Nm, normal torque value 0.01 Nm) value of the "MC_Torquelimiting" block.