Siemens SIMATIC PROFINET Function Manual page 224

Functions
5.9 Standard machine projects
Line 8: Port interconnection 2, local port.
Line 9: Port interconnection 2, partner port
Line 10: Port interconnection 3, local port.
Line 11: Port interconnection 3, partner port.
Figure 5-90 Data block with data record for port interconnections
Interconnection not listed in data block
If the partner port was configured as "Setting partner by user program" in the port properties
and this port is not listed in the data record or data block resp., then the CPU sets this port to
the setting "any partner". If no data record is transmitted at all, the CPU sets this "any
partner" setting for all program-controlled assignments.
Additional information
For information on the basic structure of the data record and on using the instruction
"ReconfigIOSystem" see the STEP 7 online help.
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PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG