Rockwell Automation Publication 1756-PM020F-EN-P - January 2019 63
Chapter 3
CIP Addressing Examples
The examples in this chapter show:
• Request Path strings for various data accesses using native CIP service
requests and addressing.
• Only a portion of a message frame for requests and responses.
• How various references to atomic data types, arrays, and portions of
arrays are constructed.
Visit http://www.rockwellautomation.com/enabled/guides.html
to download:
• The traffic capture files that contain these services.
• The controller project file used as the target in these examples.
See also
Atomic Members of Predefined Data Types on page 63
Accessing User-Defined Structures on page 69
The examples access tags that return atomic data types.
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 - Symbolic Segment Addressing
Request Service 4C Read Tag Service (Request)
Request Path Size 04 Request Path is 4 words (8 bytes) long
Request Path 91 05 70 61 72 74 73 00 ANSI Ext. Symbolic Segment for parts
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
Predefined Data Types
Example 1 (Symbolic Segment
Addressing Method)
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