96 Rockwell Automation Publication 1756-UM001M-EN-P - February 2012
Chapter 5 Communication Networks
The ControlNet network often functions as the following:
• A substitute/replacement for the remote I/O (RIO) network because the
ControlNet network adeptly handles large numbers of I/O points
• A backbone for multiple distributed DeviceNet networks
• A peer interlocking network
Figure 7 - ControlNet Network Overview
In this example, these actions occur via the ControlNet network:
• The controllers produce and consume tags.
• The controllers initiate MSG instructions that do the following:
– Send and receive data.
– Configure devices.
• The workstation is used to do the following:
– Configure both the ControlNet devices and the ControlNet network.
– Download and upload projects from the controllers.
For more information about using ControlNet modules, see ControlNet
Modules in Logix5000 Control Systems User Manual, publication
CNET-UM001
.
ControlNet Network
Distributed I/O
1756-CNB Module (as an
adapter) with 1756 I/O
Modules
1794-ACN15 Adapter with
1794 I/O Modules
Workstation
CompactLogix Controller
FlexLogix Module
1734-ACNR Adapter with
1734 I/O Modules
PanelView Terminal
PLC-5/40C15 Controller
PowerFlex 700S AC Drive with
DriveLogix Software
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