Assigning parameters for the HMI device in STEP 7   
6.6 Assigning parameters for Media Redundancy Protocol and Isochronous Real-Time 
  KP8, KP8F, KP32F 
94  Operating Instructions, 11/2011, A5E03284305-02 
6.6  Assigning parameters for Media Redundancy Protocol and 
Isochronous Real-Time 
KP8, KP8F and KP32F are designed for MRP and IRT.    
See the STEP 7 Online Help for a description of how to configure MRT and IRT in STEP 7. 
You will find detailed information in the following manual: 
You can find additional information on device names and device number in the manual 
"SIMATIC PROFINET System Description 
(http://support.automation.siemens.com
/WW/view/en/19292127)".