Network Design; Star Topology; Line Topology; Ring Topology - Danfoss VLT Compact Starter MCD 201 Installation Manual

Network Design

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.
8 8
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
the EtherNet/IP Module connects to another module,
which in turn connects to another module until all devices
are connected.
Illustration 8.2 Line Network Topology
20
EtherNet/IP Module
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
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.
nd
Ethernet port of
NOTICE
The network switch must support loss of line detection.
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st EtherNet/IP Module via a network switch. The 2
Illustration 8.3 Ring Network Topology
nd
MG17M202