Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 52)

52 Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
Chapter 4 Using Programming Software in DH+ Applications
To do this, use the 1756-ENET module to connect to a second ControlLogix
chassis that contains the second 1756-DHRIO or 1756-DHRIOXT module, as
shown in the following figure.
Use RSLogix 5 RSLogix 5 software is required to send read/write message instructions from
PLC-5s in DH+ applications. To send messages, follow these steps:
1. Start the RSLogix 5 software.
2. Begin a new project or open a project.
3. Add a rung to the ladder logic portion of the project.
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PLC-5 Controller
PCCC Messages
1756-ENET Module
Personal Computer Running RSLinx Software
Ethernet
1756-DHRIO Module
1756-DHRIO Module
DH+
CH A
DH+
CIP Message
CH B
IMPORTANT This section offers a brief description of how to send a message via
RSLogix 5 software. For a full description of how to use the software, see
the online help.
Click here to add
a rung.