User manual

Publication ENET-UM001I-EN-P - January 2010 61
Configure a Supervisor on a Device-level Ring Network Chapter 5
Example Device-level Ring Topology
Supervisor Node
A DLR network requires at least one node to be configured as ring supervisor.
Currently, two Rockwell Automation products support the ring supervisor
functionality.
• 1756-EN2TR, ControlLogix EtherNet/IP 2-port module
• 1783-ETAP, 1783-ETAP1F, and 1783-ETAP2F EtherNet/IP taps
1783-ETAP
1783-ETAP
1783-ETAP
1756-EN2TR 1734-AENTR 1738-AENTR
1756-EN2TR
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.