Siemens SINAMICS S120 Function Manual page 820

Communication
11.3 Communication via PROFINET IO
Topology rules
Topology rules for RT
● A topology can be, but need not be configured for RT. If a topology has been configured,
the devices must be wired in accordance with the topology.
● Otherwise, the wiring between devices is entirely optional.
Topology rules for IRT
● Mixed operation is not supported by STEP 7 V5.4 SP4, i.e. IRT "high performance"
cannot be combined with IRT "high flexibility" in the same synchronization domain.
● A synchronization domain with IRT "high performance" can contain a maximum of one
IRT "high performance" island. "Island" means that the devices must be interconnected to
match the configured topology. A synchronization master must be positioned in the
relevant island.
● IRT "high flexibility" is subject to the same topology rules as for IRT "high performance",
the only exception being that a topology does not need to be configured. However, if a
topology has been configured, the devices must be wired to match the topology.
Device selection in HW Config
Hardware catalog:
The drive unit from the appropriate device family entry in the hardware catalog must be
configured. For the real-time class IRT, these are all entries as of firmware version V2.5.
GSDML:
GSDML files for devices which contain IRT as of firmware version V2.5.
820
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions