User Manual User Manual

Rockwell Automation Publication 1794-UM010D-EN-E - July 2013 29
Chapter 3
Communicate With Your Module
Overview
Read this chapter to familiarize yourself with configurable features on the
1794-VHSC Very High Speed Counter module
Communication Over the
I/O Backplane
One 1794-AENT or 1794-AENTR EtherNet/IP adapter can interface up to
eight terminal base units with installed FLEX I/O modules, forming a FLEX I/O
system of up to eight slots. The adapter communicates to other network system
components (typically one or more controllers or scanners, and/or programming
terminals) over the EtherNet/IP network. The adapter communicates with its
I/O modules over the backplane.
Data is exchanged scheduled when mapped, or unscheduled using EtherNet/
IP instructions.
For Information About See Page
Communication Over the I/O Backplane
29
I/O Structure 31
Safe State Data 32
Device Actions 32
1794-VHSC — High Speed Counter Module Image
Table Mapping
35
Input Status Word Bits 32
Bit/Word Definitions 37
Configuration Word Definition 42
45900
EtherNet/IP
Adapter
Read
Read
Words
Inputs
Status
Outputs
Configuration
Inputs
Status
Outputs
Configuration
Inputs
Status
Outputs
Configuration
Write
Words
15
0
Write