Expert Functions   
5.2 Extending a PROFIdrive message frame 
  Connection of the SINAMICS S120 to the Technology CPU 
136  Product Information, 09/2011, A5E00480378-04 
12. Close the object properties of the SINAMICS S120 and check whether the newly added 
slots are listed in the address area of the SINAMICS S120. 
 
13. Then save and compile the HW Config hardware configuration.