Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 141)

Rockwell Automation Publication 1756-UM514C-EN-P - June 2014 141
Connecting a ControlLogix Controller to Remote I/O Chapter 11
Scan 1771 Remote I/O
Adapters through a
1756-DHRIO or
1756-DHRIOXT Module in a
Remote Chassis In this application, a ControlLogix controller scans remote FLEX I/O modules
through a 1756-DHRIO or 1756-DHRIOXT module in a remote chassis over a
ControlNet network. The following figure illustrates the steps you follow to use
this application.
Configure the 1756-DHRIO or 1756-DHRIOXT Module Switches
In this application, channel B on the 1756-DHRIO or 1756-DHRIOXT
module must be set for RIO. Channel A can be used for remote I/O or DH+,
regardless of the usage assigned to channel B.
Configure the switches on the 1756-CNB modules to the correct node addresses.
The 1756-CNB module in system number 1 uses node address 01 and the
1756-CNB module in system number 2 uses node address 23.
1756-CNB
Network Address: 01 ControlLogix Controller
1771 I/O
Rack Number: 025
Starting Group 0
1/4 Rack
41421
ControlLogix Chassis 1 ControlLogix Chassis 2
1756-CNB
Network Address: 23 1756-DHRIO