Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 81)

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Chapter 4
Creating tags
This chapter describes:
tags and the tag database
the importance of organizing tags
how to create analog, digital, and string tags
Tags and the tag database
In the tag database, you define the data you want RSView32 ™ to
monitor. Each entry in the database is called a tag. A tag is a logical
name for a variable in a device or in local memory (RAM). For
example, a tag can represent a process variable in a programmable
controller.
The current value of a tag, when required, is updated from the device
it is connected to and stored in computer memory—referred to as the
value table—so it is immediately accessible to all parts of RSView32.
For example, graphic displays use tag values to control animation or
update a trend, alarm monitoring compares current tag values to pre–
defined limits, and data logging stores tag values to create a historical
record.