Rockwell Automation Publication 1756-PM020F-EN-P - January 2019 21
1st Message Request Field Bytes (in hex) Description - Symbolic Segment Addressing
Request Service 4C Read Tag Service (Request)
Request Path Size 06 Request Path is 6 words (12 bytes) long
Request Path 91 0A 54 6F 74 61 6C 43 6F 75 6E 74 ANSI Ext. Symbolic Segment for TotalCount
Request Data 01 00 Number of elements to read (1)
1st 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
16 02 00 00 0000216 = 534 decimal
See also
CIP Services and User-created Tags on page 41
Read a single tag named rate using Symbol Instance Addressing. The tag has
a data type of DINT and a value of 534.
1st 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 8F F6
Logical Segment for Symbol Class ID
Logical Segment for Instance ID of the tag rate
Request Data 01 00 Number of elements to read (1)
1st 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 C4 00 DINT Tag Type Value
16 02 00 00 0000216 = 534 decimal
See also
Read Tag Service on page 20
Services Supported by Logix 5000 Controllers on page 18
Both Symbolic Segment Addressing and Symbol Instance Addressing may
Instance Addressing
Read Tag Service Error Codes
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