Siemens Sinamics S120 Function Manual page 314

Commissioning
6.10 PROFIsafe communication
4. First create a mounting rail ((0)UR) under HW Config in the left-hand window:
From the standard catalog under SIMATIC 300/RACK-300, drag the mounting rail to the
upper left-hand field (the cursor has a "+" character).
Image 6-27 Creating a mounting rail
314
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated