Siemens SINAMICS S120 Function Manual page 149

4. First create a mounting rail ((0)UR) under HW Config in the lefthand window:
Figure 7-20 Creating a mounting rail
Safety Integrated
Function Manual, (FHS), 11/2009, 6SL3097-4AR00-0BP0
From the standard catalog under SIMATIC 300/RACK-300, drag the mounting rail to the
upper lefthand field (the cursor has a "+" character).
7.4 Procedure for configuring PROFIsafe communication
Commissioning
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