National Instruments BridgeVIEW 用户手册

Glossary

G-4

© National Instruments Corporation

dynamic attributes

Tag attributes that do not require the BridgeVIEW Engine to be restarted 
when they are edited or reconfigured. Examples of dynamic attributes 
include enabling logging operations, alarm attributes, and some scaling 
attributes. See also static attributes.

E

Engine

See BridgeVIEW Engine.

engineering units (EU)

Terms of data measurement, as degrees Celsius, pounds, grams and so on.

error message

An indication of a software or hardware malfunction, or an unacceptable 
data entry attempt.

event

Something that happens to a tag in the BridgeVIEW system. Events include 
tags going into or out of alarm state and the user setting a tag value. 

event driven 
programming

A method of programming whereby the program waits on an event 
occurring before executing one or more functions.

F

For Loop

Iterative loop structure that executes its subdiagram a set number of times. 
Equivalent to conventional code: 

For i = 0 to n – 1, do....

formula node

Node that executes formulas that you enter as text. Especially useful for 
lengthy formulas that would be cumbersome to build in block diagram 
form.

frame

Subdiagram of a Sequence Structure.

free label

Label on the front panel or block diagram that does not belong to any other 
object.

front panel 

The interactive user interface of a VI. Modeled from the front panel of 
physical instruments, it is composed of switches, slides, meters, graphs, 
charts, gauges, LEDs, and other controls and indicators.