User manual

Publication ENET-UM001I-EN-P - January 2010 63
Configure a Supervisor on a Device-level Ring Network Chapter 5
Ring Node
A ring node is any node that operates on the network to process data that is
transmitted over the network or to pass on the data to the next node on the
network. When a fault occurs on the DLR network, these reconfigure
themselves and relearn the network topology. Additionally, ring nodes can
report fault locations to the active ring supervisor.
Construct the Physical
Network
The first thing you must do to create a new DLR network is physically connect
all necessary devices to the network. However, you should leave at least one
connection unmade, that is, temporarily omit the physical connection between
two nodes on the ring, as the factory default settings of DLR devices are set to
operate in linear/star mode or as ring nodes on existing DLR networks.
The figure below shows an example of a new DLR network with one physical
conn
ection left open.
Example Device-level Ring Topology with One Connection Left Unmade
Last physical
connection is
not made.