Publication 1756-UM001G-EN-P - January 2007
Communicate over Networks 25
Additional Resources
For additional information, consult these publications:
• EtherNet/IP Modules in Logix5000 Control Systems User Manual,
publication ENET-UM001
• Logix5000 Controllers Design Considerations Reference Manual,
publication 1756-RM094
ControlNet Network
Communication
The ControlNet network is a real-time control network that provides
high-speed transport of both time-critical I/O and interlocking data
and messaging data, including uploading and downloading of
programming and configuration data on a single physical-media link.
The ControlNet network’s highly-efficient data transfer capability
significantly enhances I/O performance and peer-to-peer
communication in any system or application.
The ControlNet network is highly deterministic and repeatable and
remains unaffected as devices are connected or disconnected from the
network. This robust quality results in dependable, synchronized, and
coordinated real-time performance.
The ControlNet network often functions as:
• a substitute/replacement for the remote I/O (RIO) network
because the ControlNet network adeptly handles large numbers
of I/O points.
• a backbone to multiple distributed DeviceNet networks.
• a peer interlocking network.
For ControlNet communication, you have two communication
modules from which to choose.
ControlNet Communication Modules
Functions Required
Module
• Control I/O modules.
• Require an adapter for distributed I/O on ControlNet links.
• Communicate with other ControlNet devices (messages).
• Share data with other Logix5000 controllers (produce/consume).
• Bridge ControlNet links to route messages to devices on other networks.
1756-CNB
• Perform same functions as a 1756-CNB module.
• Support redundant ControlNet media.
1756-CNBR
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