Rockwell Automation Allen-Bradley ControlNet 1734-ACNR User Manual page 25

EtherNet/IP Network
EtherNet/IP Bridge in
1794 System
ControlNet Bridge in
Same 1794 System
ControlNet Network
Keep in mind that you can only bridge messages across networks. You
cannot bridge I/O connections from one network to another.
The CompactLogix and FlexLogix controllers'
IMPORTANT
performance degrades significantly if you use the controller
as a bridge. Bridging over the FlexLogix controller should
be targeted toward applications that are not real time
dependent, for example RSLogix 5000 software program
downloads.
In the Configure a Drive on a DeviceNet Network figure, status data can also
be transferred from DeviceNet through the Logix5000 controller to a
RSView32 operator interface. For a FlexLogix controller, map the data into the
DeviceNet I/O image and then use RSLinx OPC from the PC to the
Logix5000 controller over ControlNet. This avoids using the limited bridging
resources of the FlexLogix controller.
The example RSLinx software screen below shows how the EtherNet/IP
bridge links to the ControlNet network:
You can bridge messages across multiple networks, but I/O Control is mostly
restricted to being bridged across only one network. I/O Control from a
ControlLogix controller over ControlNet to a scanner device is supported.
You cannot go through a gateway chassis to control I/O, even though in some
circumstances, RSLogix 5000 software accepts such a configuration in the I/O
Configuration folder.
About the Logix5000 ControlNet Communication Modules
Publication CNET-UM001C-EN-P - November 2005
1-11