Siemens SINAMICS S120 Function Manual page 428

Communication PROFIBUS DP/PROFINET IO
10.2 Communication via PROFIBUS DP
Figure 10-35 Insert new slot
5. Assign the setpoint slot the type "slave-to-slave communication".
6. Select the Publisher DP address in the "PROFIBUS address" column.
This displays all DP slaves from which actual value data can be requested. It also
provides the possibility of sharing data via slave-to-slave communication within the same
drive group.
7. The "I/O address" column displays the start address for every DO.
Select the start address of the data of the DO to be read. This is 268 in the example.
If the complete data of the Publisher are not read, set this via the "Length" column. You
may also offset the start address for the request so that data can be read out in the
middle of the DO telegram.
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions