Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 83)

Creating tags

4–3
Data sources
When defining an analog, digital, or string tag, you must specify a data
source. The data source determines whether the tag receives its values
externally or internally.
Device
A tag with Device as its data source receives its data from a source
external to RSView32. The data can come from a direct
programmable controller driver or from an OPC
® or DDE server.
Tags with Device as the data source count toward the total tag limit
you purchased (150, 300, 1,500, and so on).
Memory
A tag with Memory as its data source receives its data from the
RSView32 internal value table. A memory tag can be used to store
values internally. Tags with Memory as the data source do not count
toward the total tag limit.
Organizing tags
Organizing tags makes database creation faster and simpler. To
organize tags:
establish naming conventions
Naming conventions enable you and operators to use the
RSView32 wildcards most effectively when searching for and
displaying tags during development and runtime.
use folders to group related tags