Rockwell Automation 1769-L16ER-BB1B_L18ER-BB1B_L18ERM-BB1B CompactLogix 5370 L1 Controllers System Quick Start - Manual (Page 66)

66 Rockwell Automation Publication IASIMP-QS024B-EN-P - December 2012
Appendix A Understanding Other Application Options
DLR Network Topology
A DLR network topology is a single-fault-tolerant ring network in which DLR-capable
Rockwell Automation devices use embedded technology and dual EtherNet/IP ports to establish
a network that is resilient to single points of failure, recovers faster when single faults occur, and
does not require switches.
Configuring a DLR network topology requires you to complete a few tasks that do not apply to
using a CompactLogix 5370 L1 controller in a linear or star network topology. For example, a
DLR network topology requires that one supervisor-capable network device be configured as
the active ring supervisor. CompactLogix 5370 L1 controllers are supervisor-capable devices on a
DLR network.
This graphic shows a DLR network topology with a CompactLogix 5370 L1 controller.
0 2 0 1734-AENTR
Module
Status Network
Activity Network
Status Point Bus
Status System
Power Field
Power
POINT I O
Link 1
Activity/
Status
Link 2
Activity/
Status
IP ADDRESS
Kinetix 6500 Drives
CompactLogix 5370 L1
Control System
1794-AENTR FLEX
™
I/O EtherNet/IP
Adapter with FLEX I/O Modules
PanelView Plus Terminal
Connected via a1783-ETAP
EtherNet/IP Tap
Computer Connected via a
1783-ETAP EtherNet/IP Tap
1734-AENTR POINT I/O
EtherNet/IP Adapter with
POINT I/O Modules
Kinetix 350 Drive
Connected via a1783-ETAP
EtherNet/IP Tap