Rockwell Automation 193-DNENCATR EtherNet/IP Communications Auxiliary User Manual - Manual (Page 51)

Rockwell Automation Publication 193-UM014B-EN-P December 2011
51
Chapter
7
Automation Controller Communications
Introduction This chapter describes and gives examples of how each type of EtherNet/IP
messaging, I/O messaging and Explicit messaging, is used.
Ethernet Messaging The EtherNet/IP Communications Auxiliary supports two types of EtherNet/IP
messaging.
• I/O Messaging — Used for deterministic EtherNet/IP communications
with ControlLogix™, CompactLogix™, SoftLogix™, and EtherNet/IP
scanners. Its primary use is to read and write I/O data for control purposes.
• Logic Explicit Messaging — Used for non-deterministic communications
in which the data is not critical for control. Logic explicit messages have a
lower priority compared to I/O messages and are used to read and write
non-critical data.
I/O Messaging RS Logix 5000™ software is used to configure I/O messaging between an
automation controller and an EtherNet/IP Communications Auxiliary on an
EtherNet/IP network.
The following example provides the steps necessary to configure a Logix
controller for I/O messaging.
ControlLogix Configuration with Add-On Profiles
An Add-On Profile is available for the EtherNet/IP Communications Auxiliary
and can be used with RSLogix 5000 version 17 and higher. The profile can be
downloaded from:
http://support.rockwellautomation.com/controlflash/LogixProfiler.asp
An existing project can be used or a new project can be created to configure
EtherNet/IP I/O Messaging. To create a new project, perform the following
steps.