Configuring the Mobile Panel   
6.1 Configuration in WinCC 
  Mobile Panels 2nd Generation 
168  Operating Instructions, 09/2018, A5E33876626-AC 
3.  Click the icon of the controller. 
 
4.  Select "PROFINET interface [X2]" in the properties window. 
5.  Under "Ethernet addresses", click on the "Add new subnet" button. 
6.  Under "IP protocol", assign a unique IP address to the controller in the subnet.