Siemens SIMATIC S7 300 Getting Started page 24

Configuration
4.1 Creating a T station
Step Activity
12 Make sure that the devices are configured as shown in the figure below.
13 Complete the network configuration by calling the Network > Save and compile command.
Select "Compile and check everything" and confirm with "OK".
24
Result
CPU 317T-3PN/DP: Controlling a SINAMICS S120
Getting Started, 10/2013, A5E00480391-06