Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 28)

28 Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
Chapter 2 Using the Data Highway Plus Network
• Assign DH+ node numbers.
• Use the Studio 5000 environment to enter the controller slot or execute
the default for the controller slot for each channel configured for DH+.
Remote DH+ Messaging
Devices use remote DH+ messaging to communicate between devices on
physically separate networks. A device that uses remote DH+ messaging must be
able to perform the following:
• Generate Remote DH+ packets.
• Support Remote DH+ protocol.
• Send and receive messages.
Use remote DH+ messaging when the following conditions apply:
• The message originating device or the message target device is one of the
devices listed in the table on page
25 .
• A DH+ link is in the message’s path from originator to target.
• The message originating device and the message target device are on
separate networks or the message target is in a ControlLogix chassis and
multiple ControlLogix controller targets are in the chassis.
IMPORTANT These configuration steps must be done for each 1756-DHRIO or
1756-DHRIOXT in the your system.