Rockwell Automation Publication 1756-PM020F-EN-P - January 2019 41
Chapter 2
CIP Services and User-created Tags
This chapter describes processes that CIP clients use when interacting with
Logix 5000 controller data. The processes are:
• Finding the controller-scope tags that are created in a Logix 5000
controller
• Isolating user created tags from system tags and identify structured tags
• Locating the structure template for a specific structure
• Determining the structure makeup of a specific structure
• Determining the data packing of the members of a structure when
accessed as a whole and not member by a member.
• Determining when to refresh the list of tags and structure information
See also
How tags are organized in the controller on page 41
Symbol object on page 42
Template object on page 42
Creating and maintaining a symbol object list on page 44
A client application interacts with the symbol and template objects
associated with tags in Logix 5000 controllers. Through this interaction, the
client application determines:
• What tags are created
• If a tag is structure
• The structure members
• How the data is packed in a message when reading a structure
How tags are organized in
the controller
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