Rockwell Automation Publication 1756-UM001M-EN-P - February 2012 97
Communication Networks Chapter 5
ControlLogix ControlNet Module Features
The ControlNet communication modules provide these features:
• Support for messaging, produced/consumed tags, and distributed I/O
• Use a common application layer with DeviceNet and EtherNet/IP
networks
• Requires no routing tables
• Support the use of coax and fiber repeaters for isolation and increased
distance
• Support redundant media (1756-CNBR, 1756-CN2R, and
1756-CN2RXT modules only)
ControlLogix ControlNet Modules
This table lists the available ControlLogix ControlNet modules and their
primary features.
Software for ControlNet Networks
This table lists software that is used with the ControlNet networks and modules.
Table 21 - ControlNet Modules and Capabilities
Module Is used to
1756-CNB • Control I/O modules.
• 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-CNBR • Perform the same functions as a 1756-CNB module.
• Support redundant ControlNet media.
1756-CN2 • Perform the same functions as a 1756-CNB module.
• Provide high-speed I/O bridge functionality; twice the capacity for more demanding
applications.
1756-CN2R • Perform the same functions as a 1756-CN2 module.
• Support redundant ControlNet media.
1756-CN2RXT • Perform same functions as a 1756-CN2R module.
• Operate in extreme environments with -25…70 °C (-13…158 °F) temperatures.
Table 22 - Software for Use with ControlNet Networks
Software Is used to Required/Optional
RSLogix 5000 • Configure ControlLogix projects.
• Define ControlNet communication.
Required
RSNetWorx™ for
ControlNet™
• Configure ControlNet devices.
• Schedule a network.
RSLinx Classic or
Enterprise
• Configure communication devices.
• Provide diagnostics.
• Establish communication between devices.
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