National Instruments BridgeVIEW 用户手册
Glossary
G-10
© National Instruments Corporation
Tag Monitor
A utility to view the current value of a tag, along with its status and alarm
state.
state.
tag status
A variable that determines the validity of a tag value. A negative status
represents an error, a positive status represents a warning, and a status of
zero represents a good tag value.
represents an error, a positive status represents a warning, and a status of
zero represents a good tag value.
terminal
Object or region on a node through which data passes.
timestamp
The exact time and date at which a tag value was sampled. Tag values are
stored with their timestamps in the RTDB.
stored with their timestamps in the RTDB.
top-level VI
VI at the top of the VI hierarchy. This term distinguishes the VI from its
subVIs.
subVIs.
trend
A view of data over time. Trends can display real-time or historical data.
U
universal constant
Uneditable block diagram object that emits a particular ASCII character or
standard numeric constant, for example,
standard numeric constant, for example,
π
.
update deadband
The range through which a tag value must change before it is updated in the
Real-Time Database.
Real-Time Database.
user
See operator.
user-defined constant
Block diagram object that emits a value you set.
V
VI
See virtual instrument.
VI library
Special file that contains a collection of related VIs for a specific use.
virtual instrument
A program in the graphical programming language G; so-called because it
models the appearance and function of a physical instrument.
models the appearance and function of a physical instrument.