Siemens SINAMICS S120 Function Manual page 432

Communication PROFIBUS DP/PROFINET IO
10.2 Communication via PROFIBUS DP
Figure 10-41 Display of the telegram extension
By selecting the item "Communication -> PROFIBUS" for the drive object "SERVO2" in the
object tree you get the structure of the PROFIBUS telegram in receive and transmit direction.
The telegram extension from PZD5 is the portion for slave-to-slave communication.
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions