64 Rockwell Automation Publication 1756-PM020F-EN-P - January 2019
Message Reply Field Bytes (in hex) Description - Symbolic Segment Addressing
Extended Status Size 00 No extended status
Reply Data C3 00 INT Tag Type Value
2A 00 0x002A= 42 decimal
See also
Atomic Members of Predefined Data Types on page 63
Read a single integer tag named parts.The tag has a data type of INT and a
value of 42.
Message Request Field Bytes (in hex) Description - Symbol Instance Addressing
Request Service 4C Read Tag Service (Request)
Request Path Size 03 Request Path is 3 words (6 bytes) long
Request Path 20 6B
25 00 82 25
Logical Segment for Symbol Class ID
Logical Segment for Instance ID for tag parts
Request Data 01 00 Number of elements to read (1)
Message Reply Field Bytes (in hex) Description - Symbol Instance Addressing
Reply Service CC Read Tag Service (Reply)
Reserved 00
General Status 00 Success
Extended Status Size 00 No extended status
Reply Data C3 00 INT Tag Type Value
2A 00 002A = 42 decimal
See also
Atomic Members of Predefined Data Types on page 63
Write the value of 14.5 to the 6th element of an array of REALs named
setpoints(setpoints[5]).
Message Request Field Bytes (in hex) Description - Symbolic Segment Addressing
Request Service 4D Write Tag Service (Request)
Request Path Size 07 Request Path is 7 words (14 bytes) long
Request Path 91 09 73 65 74 70 6F 69 6E 74 73 00 28 05 ANSI Ext. Symbolic Segment for setpoints and
…the Member segment for 5
Request Data CA 00 REAL Tag Type Value
01 00 Number of elements to write (1)
00 00 68 41 0x41680000 = 14.5 decimal
Example 2 (Symbol Instance
Addressing Method)
Example 3 (Symbolic Segment
Addressing Method)
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