Table of Contents
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Chapter Objectives
About the ControlNet
Adapter
Communication Over the
FLEX I/O Backplane
ControlNet
Adapter
Network
Allen-Bradley Motors
Input, Output and
Configuration Files for Analog
Modules when used with
ControlNet
In this chapter you will learn about:
ControlNet Adapter
I/O structure
safe state data
communication fault data
idle state behavior
input data behavior upon module removal
The FLEX I/O ControlNet adapters (cat. no. 1794–ACN15 and
–ACNR15) interfaces up to 8 FLEX I/O modules and a ControlNet
processor or scanner. The adapter can support ControlNet real–time
data connections to individual modules or module groups. Each
connection is independent of the others and can be from different
processors or scanners.
One 1794-ACN15 and -ACNR15 ControlNet 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 ControlNet network. The adapter communicates with its I/O
modules over the backplane.
I/O Module
Inputs
Read
Status
Outputs
Write
Configuration
Slot 0
Data is exchanged scheduled (when mapped) or unscheduled (using
CIO instructions).
I/O Module
0
Inputs
Read
Words
Status
Outputs
Write
Words
Configuration
15
Slot 1
6
Chapter
I/O Module
Inputs
Status
Outputs
Configuration
Slot 7
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