Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 73)

Rockwell Automation Publication 1756-UM514C-EN-P - June 2014 73
Messaging Between PLC-5 and SLC 5/04 Controllers Chapter 5
DH+ Messaging: PLC-5
Controllers with Multiple
ControlLogix Chassis This application sends a DH+ message from PLC-5 controller A through
1756-DHRIO and 1756-DHRIOXT modules in separate chassis over
ControlNet to PLC-5 controller B. Remote DH+ messaging is required to send
the message.
The following figure illustrates the steps you must use in this application.
ControlLogix System 1
1756-DHRIO 1756-DHRIO
PLC-5/25 Controller A
Node Number: 015
DH+ Link
Link ID 1
PLC-5/25 Controller B
Node Number: 035
ControlLogix System 2
This can be Ethernet,
ControlNet or DH+
Channel A
Node Number: 010 Channel B
Node Number: 030
ControlNet
Link ID 2
DH+ Link
Link ID 3
1756-CNB
Node Number: 22 1756-CNB
Node Number:23