36 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Chapter 4 Configuring Modules for Communication on a Remote I/O Network
Add a 1756-DHRIO Module
The 1756-DHRIO module provides two configurable channels that can either
send and receive messages over DH+ or scan remote I/O devices. When a
channel is configured for remote I/O, the 1756-DHRIO module is designed to
function as a remote I/O scanner for a ControlLogix controller. I/O data is
exchanged between the 1756-DHRIO module and:
• remote adapters on the remote I/O link
• the ControlLogix controller
• remote block transfer modules
Use the following steps to add a 1756-DHRIO module to your RSLogix 5000
project.
1. Start the RSLogix 5000 software.
2. Begin a new project or open an existing project offline.
3. Add the 1756-DHRIO Module to the project.
A. Right-click on I/O Configuration folder
in the controller organizer and select
New Module from the pull-down menu.
B. Click the + to the nonisolated left of the
Communications group to display the
communication modules available.
C. Select the series of 1756-DHRIO
module you are using in your
configuration.
D. Click OK.
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