Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 68)

68 Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
Chapter 5 Messaging Between PLC-5 and SLC 5/04 Controllers
DH+ Messaging: PLC-5
Controllers with One 1756-
DHRIO This application sends a DH+ message from PLC-5 controller A through a
1756-DHRIO module to PLC-5 controller B. Remote DH+ messaging is
required to send the message.
The following figure illustrates the steps you must follow in this application.
Configure the Module Switches
In this example, Channel A and Channel B on the 1756-DHRIO and
1756-DHRIOXT modules must be set for DH+.
Configure a Routing Table for the 1756-DHRIO Module
Use RSLinx to configure a routing table for the modules as shown in the
following figure.
ControlLogix
Chassis
1756-DHRIO
PLC-5/25 Controller A
Node Number: 015
DH+ Link
Link ID 1
PLC-5 Controller B
Node Number: 025
41363
Channel A
Node Number: 010
Channel B
Node Number: 020
DH+ Link
Link ID 2