Owner manual

Rockwell Automation Publication 1756-UM022A-EN-P - November 2012 53
Communicate over Networks Chapter 4
ControlNet Communication
For ControlNet communication, choose a 1756-CNB or 1756-CNBR module
for standard communication, or a 1756-CN2, 1756-CN2R, or 1756-CN2RXT
module for safety communication.
These products are available for ControlNet networks.
The ControlNet communication modules provide the following:
• Support for messaging, produced/consumed safety and standard tags, and
distributed I/O
• They support the use of coax and fiber repeaters for isolation and increased
distance.
Producing and Consuming Data via a ControlNet Network
The GuardLogix controller supports the ability to produce (send) and consume
(receive) tags over ControlNet networks. The total number of tags that can be
produced or consumed is limited by the number of available connections in the
GuardLogix controller.
Table 14 - ControlNet Modules
If your application Select
• Controls standard I/O modules
• Requires an adapter for distributed I/O on ControlNet links
• Communicates with other ControlNet devices (messages)
• Shares standard data with other Logix5000 controllers (produce/consume)
• Bridges ControlNet links to route messages to devices on other networks
1756-CNB
• Performs same functions as a 1756-CNB module
• Also supports redundant ControlNet media
1756-CNBR
• Performs the same functions supported by the 1756-CNB module with higher
performance
• Supports CIP Safety communication
1756-CN2
• Performs same functions as a 1756-CN2 module
• Also supports redundant ControlNet media
1756-CN2R
• Perform the same functions as a 1756-CN2R module
• Operate in extreme environments with -25…70 °C (-13…158 °F) temperatures
1756-CN2RXT
Table 15 - Products for ControlNet Modules
Product Is Used to Required
Studio 5000 environment • Configure the GuardLogix project
• Define ControlNet communication
Yes
RSNetWorx for ControlNet software • Configure the ControlNet network
• Define the network update time (NUT)
• Schedule the ControlNet network
Yes
RSLinx software • Configure devices
• Establish communication between devices
• Provide diagnostics
Yes