8 Network Design
The Ethernet Module supports star, line, and ring
topologies.
8.1 Star Topology
In a star network, all controllers and devices connect to a
central network switch.
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Illustration 8.1 Star Network Topology
8.2 Line Topology
In a line network, the controller connects directly to 1 port
of the first EtherNet/IP Module. The 2
nd
Ethernet port of
the EtherNet/IP Module connects to another module,
which in turn connects to another module until all devices
are connected.
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Illustration 8.2 Line Network Topology
NOTICE
The EtherNet/IP Module has an integrated switch to
allow data to pass through in line topology. The
EtherNet/IP Module must be receiving control power
from the soft starter for the switch to operate.
NOTICE
If the connection between 2 devices is interrupted, the
controller cannot communicate with devices after the
interruption point.
NOTICE
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.
8.3 Ring Topology
In a ring topology network, the controller connects to the
1
st
EtherNet/IP Module via a network switch. The 2
nd
Ethernet port of the EtherNet/IP Module connects to
another module, which in turn connects to another
module until all devices are connected. The final module
connects back to the switch.
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Illustration 8.3 Ring Network Topology
NOTICE
The network switch must support loss of line detection.
Network Design
EtherNet/IP Module
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MG17M202
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Summary of Contents for VLT Compact Starter MCD 201
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