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Publication 1768-UM001C-EN-P - November 2007
28 Communicate over Networks
1768-CNB and 1768-CNBR ControlNet Modules
CompactLogix ControlNet communication modules bridge ControlNet links
to route messages to devices on other networks. The modules also monitor
and control I/O modules located remotely from CompactLogix controllers.
The 1768-CNB and 1768-CNBR ControlNet modules:
provide messaging data for configuration and programming.
support operator interfaces and uploading and downloading.
support I/O bridging.
support the transfer of scheduled data via produced/consumed tags.
support unscheduled MSG instruction communication with other
ControlNet nodes.
support local communication network access through the network
access port (NAP).
support redundant media (1768-CNBR module only).
In this example:
the controllers produce and consume tags.
the controllers initiate MSG instructions that send and receive data or
configure devices.
the personal computer uploads or downloads projects to the controllers.
the personal computer configures devices on the ControlNet network
and the network itself.
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