Publication 1756-UM001G-EN-P - January 2007
42 Communicate over Networks
ControlLogix DH+ Network Communication Overview
Communicate over a DH+ Network
For the controller to communicate to a workstation or other device
over a DH+ network, use RSLinx software to:
• specify a unique link ID for each ControlLogix backplane and
additional network in the communication path.
• configure the routing table for the 1756-DHRIO module.
The 1756-DHRIO module can route a message through up to four
communication networks and three chassis. This limit applies only to
the routing of a message and not to the total number of networks or
chassis in a system.
Additional Resources
For additional information, consult the ControlLogix Data Highway
Plus - Universal Remote I/O Module User Manual, publication
1756-UM514.
SLC 500 Controller
DH+ Network
Data Collection and
Recipe Management
PLC-5 Processor
ControlLogix
Controller
ControlLogix
Controller
DH+ Network
RSView Station SLC 500 ControllerPLC-5 Controller RSView Station
Workstation
EtherNet/IP Network
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