7. Network Design
The Profinet Module supports star, line and ring topologies.
7.1 Star Topology
In a star network, all controllers and devices connect to a central network switch.
Figure 7-1 Star network topology
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7.
A
7.2 Line Topology
In a line network, the controller connects directly to one port of the first Profinet Module. The second
Ethernet port of the Profinet Module connects to another module, which in turn connects to another
module until all devices are connected.
Figure 7-2 Line network topology
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5.
A
NOTE
The Profinet Module has an integrated switch to allow data to pass through in line topology. The
Profinet Module must be receiving control power from the soft starter for the switch to operate.
NOTE
If the connection between two devices is interrupted, the controller cannot communicate with
devices after the interruption point.
NOTE
Each connection adds a delay to communication with the next module.
The maximum number of devices in a line network is 32. Exceeding this number may reduce
the reliability of the network.
Profinet Module: User Guide
19
Issue: B
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