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Understand the ControlNet
Network
1
ControlNet Overview
This chapter defines some basic ControlNet concepts and how the
ControlNet network is used for control.
ControlNet is a real-time control network that provides high-speed transport
of both time-critical I/O and interlocking data and messaging data, including
upload/download 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 where it is used.
ControlNet is highly deterministic and repeatable, and remains unaffected as
devices are connected or disconnected from the network. This ensures
dependable, synchronized, and coordinated real-time performance.
The ControlNet network is most often used in these types of configurations:
• as the default network for the ControlLogix platform.
• as a substitute/replacement for the Remote I/O (RIO) network,
because ControlNet handles large numbers of I/O points well.
• as a backbone to multiple distributed DeviceNet networks.
• as a peer interlocking network.
• instead of Data Highway Plus.
Appendix
Publication CNET-UM001C-EN-P - November 2005
B
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