Rockwell Automation Allen-Bradley 856T-B24LC - Page 50

50 Rockwell Automation Publication 856T-UM001B-EN-P - April 2021
Chapter 7 Message Structure and Configuration Example
To open the Message Instruction dialog box, click the blue square box the
Message Instruction.
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 856T-B24LC module.
Item 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 C on page 57
. Identifies
the Index for the Parameter being read.
24
6
Attribute
The Attribute value is 0.
0
7
Source Element
The name of the first tag of the data array to be
written.
Write_Assembly[0]
8
Source Length
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
—
—
1
2
3
4
5
6
7
8
9