66 Rockwell Automation Publication 1756-PM020F-EN-P - January 2019
Message Request Field Bytes (in hex) Description
Request Path
20 6B
25 00 97 8A
28 00
28 01
29 00 01 01
Logical Segment for Symbol Class ID
Logical Segment for Instance ID for tag profile
Member Segment for 0
Member Segment for 1
Member Segment of 257
Request Data 01 00 Number of elements to read (1)
Message Reply Field Bytes (in hex) Description
Reply Service CC Read Tag Service (Reply)
Reserved 00
General Status 00 Success
Extended Status Size 00 No extended status
Reply Data C4 00 DINT Tag Type Value
F0 02 00 00 0x000002F0 = 752 decimal
See also
Atomic Members of Predefined Data Types on page 63
Read the accumulated value of a timer named dwell3 (dwell3.ACC).
Message Request Field Bytes (in hex) Description - Symbolic Segment Addressing
Request Service 4C Read Tag Service (Request)
Request Path Size 07 Request Path is 7 words (14 bytes) long
Request Path 91 06 64 77 65 6C 6C 33
91 03 61 63 63 00
ANSI Ext. Symbolic Segment for dwell3
ANSI Ext. Symbolic Segment for ACC
Request Data 01 00 Number of elements to read (1)
Message Reply Field Bytes (in hex) Description - Symbolic Segment Addressing
Reply Service CC Read Tag Service (Reply)
Reserved 00
General Status 00 Success
Extended Status Size 00 No extended status
Reply Data C4 00 DINT Tag Type Value
25 02 00 00 0x00000252 = 549 decimal
See also
Atomic Members of Predefined Data Types on page 63
Example 6 (Symbolic Segment
Addressing Method)
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