Topology Rules - Siemens SINAMICS Series Operating Instructions Manual

Descriptions of functions
10.5 Communication via PROFINET IO
The reduction ratio between the update cycle of an IO device and the send cycle is set in the
"Properties" of the PROFINET interface for the relevant device.
Note
There is no intersection between the send cycles for the "even" and "odd" ranges!
Send cycles for SINAMICS drive units
A SINAMICS drive unit with PROFINET interface which supports IRT permits send cycle
settings of between 0.25 ms and 4.0 ms in a 250 µs time frame.

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 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.
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SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A