Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 14)

14 Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
Chapter 1 About the Module
Routing Limitations The modules can route a message through as many as four communication
networks and three chassis. This limit applies to only the routing of a message
and not to the total number of networks or chassis in a system.
DH+ and CIP Messaging
The modules allow an information exchange between devices, such as
ControlLogix controllers, PLC and SLC controllers.
With these modules, you can exchange information in any of the following
scenarios:
• Between PLC or SLC controllers on different networks
• Between the ControlLogix controllers and a PLC or SLC controller on
different networks
• Between ControlLogix controllers on different networks
The figure shows an example system. Two ControlLogix chassis link Data
Highway Plus networks. Communication between PLC-5® programmable
controllers on different networks is accomplished in the same manner used for
communication within a network.
41275
Data Collection and
Recipe Management Programming
Terminal
ControlLogix
Chassis ControlLogix
Chassis
Data Highway Plus
PLC-5
Data Highway Plus
SLC 500 RSView PLC-5 SLC 500 RSView