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Rockwell Automation Publication 1420-UM001E-EN-P - March 2016 39
Communication Chapter 4
We assume that you are familiar with basic message programming in a Logix
controller. Once you configure the logic, message tag, destination tag, and
message instruction, follow these steps to configure the message. This example
uses a CompactLogix™ controller, revision 20.
1.
Choose the appropriate parameters in the Message Configuration window.
Parameter Choice
Message Type Choose message type CIP Generic.
Service Type Read: Select service type Get Attribute Single (E hex)
Instance See Appendix A for the CIP Instance of the data table to read. In this example, the power
monitor Real-time Metering Values (Voltage and Current) data table is instance 101 (decimal).
Class 4 hex
Attribute 3 hex
Destination Get Attribute Single - This element is the first element of the controller tag that stores the data
being read. The tag is an array of the applicable data type the same length as the Assembly
Instance; in this example, 12 REAL elements.
Source Element Not applicable to a Read
Source Length Not applicable to a Read