National Instruments BridgeVIEW How Do You Configure Tags?

Chapter 3 Tag Configuration

BridgeVIEW User Manual 3-10 © National Instruments Corporation

How Do You Configure Tags?

When you configure a tag with the Tag Configuration Editor, you define

several attributes for the tag. You can separate these attributes into five

categories: general, connection, operations, scaling, and alarms. Each of

these categories is explained in detail later in this section.

If you import tag configuration information from a spreadsheet, follow

thesame format in your spreadsheet as indicated in the Attribute column

ofeach of the tables listed above. For more information about using

spreadsheets, see the How Do You Use Spreadsheet Files for Tag

Configuration? section in this chapter.

Configuration of a tag varies slightly depending on the data type.

Thefollowing sections discuss the details of tag configuration for each

datatype.

An analog tag is a continuous value representation of a connection to

areal-world I/O point or memory variable. This type of tag can vary

continuously over a range of values within a signal range.

Use an analog tag when you want to express a continuous value

(forexample, 0 to 100).

A discrete tag is a two-state (ON/OFF) value representation of a

connection to a real-world I/O point or memory variable. This type of

tagcan be either a 1(TRUE) or a 0(FALSE).

Use a discrete tag when you want to express a two-state (ON/OFF) value.

A bit array tag is a multi-bit value representation of a connection to a

real-world I/O point or memory variable. This type of tag can be comprised

of up to 32 discrete values.

Use a bit array tag when you have a multi-bit value in which each of the

bitsrepresents a flag or single value that is turned on or off. The maximum

length of a bit array tag is 32.