Rockwell Automation RECOMM-ENET EtherNet/IP Communications Module - Manual (Page 60)

6-2 EtherNet/IP Communications Module
Chapter 4, Configuring the Module, and chapter 5, Configuring the
Scanner or Bridge, discuss how to configure the module and
scanner or bridge on the network for these options. The Glossary
defines the different options. This chapter discusses how to use I/O
after you have configured the module and scanner or bridge.
6.2 Understanding the I/O Image
The terms input and output are defined from the scanner’s point of
view. Therefore, Output I/O is data that is output from the scanner
and consumed by the EtherNet/IP module. Input I/O is status data
that is produced by the module and consumed as input by the
scanner. The I/O image table will vary based on the following:
• Size (either 16-bit or 32-bit) of the Reference/Feedback words
and Datalink words used by the drive.
• Configuration of I/O (DPI I/O Config (23)). If all I/O is not enabled,
the image table is truncated. The image table always uses
consecutive words starting at word 0.