Rockwell Automation 1734-AENTR EtherNet/IP Network Configuration User Manual - Manual (Page 34)

34 Rockwell Automation Publication ENET-UM001L-EN-P - March 2014
Chapter 4 Configure a Supervisor on a Device-level Ring Network
Figure 3 - Example Device-level Ring Topology
DLR Nodes A DLR network uses these types of nodes:
• Supervisor Node
• Ring Node
Supervisor Node
A DLR network requires at least one node to be configured as ring supervisor.
For a list of supervisor-capable modules, see the EtherNet/IP Embedded Switch
Technology Application Guide, publication
ENET-AP005 .
Active Ring Supervisor
When multiple nodes are enabled as supervisor, the node with the numerically
highest precedence value becomes the active ring supervisor; the other nodes
automatically become back-up supervisors.
Comm Adapter
MOD NET LINK 1 LINK 2
X 100 X 10
X 1
LINK 1
LINK 2
1783-ETAP
1783-ETAP
1783-ETAP
1756-EN2TR
1756-EN2TR
1756 I/O Modules
1734-AENTR
1734 I/O Modules 1738-AENTR
1738 I/O Modules
1769-AENTR
1769 I/O Modules
IMPORTANT Out of the box, the supervisor-capable devices have their supervisor function
disabled so they are ready to participate in either a linear/star network
topology, or as a ring node on an existing DLR network.
In a DLR network, you must configure at least one of the supervisor-capable
devices as the ring supervisor before physically connecting the ring. If not, the
DLR network will not work.