88 Rockwell Automation Publication CNET-UM001F-EN-P - February 2018
Item Description
Remote chassis with any of these configurations:
• PLCs, SLC, or Logix 5000 controllers on a ControlNet or other network
• I/O modules, such as ControlLogix analog module configuration data on a ControlNet or other network
• 1771 block transfer modules
Programming terminal
Local chassis with any of these combinations:
• 1756 ControlLogix controller with a 1756-CN2 or 1756-CN2R communication module in the chassis
• 1756 ControlLogix controller with a 1756-CNB or 1756-CNBR communication module in the chassis
• 1768-L43 CompactLogix controller with a 1768-CNB or 1768-CNBR communication module in the chassis
• 1769-L32C or 1769-L35CR CompactLogix controller
• 1789 SoftLogix controller with a 1784-PCICS communication card
• PowerFlex 700S with DriveLogix controller and a 1788-CNx ControlNet communication card
• Non-Logix 5000 controller or other device connected to ControlNet via a ControlNet scanner card
Important:
The 1769-L32C and 1769-L35CR controllers can produce and consume tags over a ControlNet network to
other Logix 5000 controllers. However, Compact I/O modules that are local to the 1769-L32C and 1769-
L35CR controllers are not accessible to other Logix 5000 controllers.
Make sure of the following:
• The ControlNet modules are connected to a ControlNet network.
• All wiring and cabling are properly connected.
• The communication driver is configured for the programming
workstation.
Follow these guidelines as you work with message instructions.
Table 21 - Guidelines for MSG Instructions
Function Guidelines
For each MSG instruction, create a control
tag.
Each MSG instruction requires its own control tag. This tag contains control
elements for messages, such as DN and EN, error codes, and information to
execute the message, such as destination path and number of words to
transfer:
• Data type = MESSAGE
• Scope = controller
• The tag cannot be part of an array or a user-defined data type
Keep the source or destination data at the
controller scope.
A MSG instruction can access only tags that are in the Controller Tags folder
(controller scope).
Instructions
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