PROFINET IO
User manual 57106_hdb_en_13 61 / 94
Connecting communication nodes to a switch
with more than 2 PROFINET interfaces automat-
ically creates a star-shaped network topology.
If an individual PROFINET device fails, with this
structure it will not lead to failure of the entire net-
work. Only switch failure causes failure of the
subnet.
Ring
To increase the availability, you can connect both
open ends of a line structure using a switch. If
you parameterize the switch as a redundancy
manager, it will make sure that in case of net-
work interruption the data are transmitted via a
functioning network connection.
Tree
Connection of several star-shaped structures
creates a tree-shaped network topology.
Sample network
Fig. 11-1: Sample network
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