66 Rockwell Automation Publication 42EF-UM001A-EN-P - September 2015
Message Structure and Configuration Example Configuration Examples
The following table identifies the data that are required to complete the Message
Configuration dialog box to Write “Test” to the Application Specific Name in
the 42EF:
Validation of Write
Once the data in the Message Instruction dialog box has been populated; trigger
the rung of logic that contains the message instruction and “Test” is written from
the “Write_Assembly” to the Application Specific Name Parameter Index in the
42EF.
The data is validated by either reading
the value of Index 24 in the sensor or by
viewing the 1734-4IOL configuration. To view the configuration of the
1734-4IOL follow these steps:
1. Click the 1734-4IOL in the IO Configuration.
2. A pop-up box is displayed, advising that changes within the sensor have been
dete
cted. Expand the settings and to see that the Application Specific Name
has changed to Test.
Box Description Value
1 Message Type
The message type is CIP Generic. CIP Generic
2 Service Type
The service type is Custom. Custom
3 Service Code
Established from Service Code Table. 4E
4 Class
The class is 3a3. 3a3
5 Instance
Established from Appendix A.
Identifies the Index for the Parameter being read. 24
6 Attribute
The Attribute value is 0. 0
7 Source Element
Contains the name of the first tag of the data array to be written. Write_Assembly[0]
8 Source Length
This box contains the number of bytes of service data to be sent or received in a
message. Defined in Data Structure Tables.
5 bytes
9 Destination Element
N/A N/A
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