National Instruments BridgeVIEW D

Glossary

cluster A set of ordered, unindexed data elements of any data type including

numeric, Boolean, string, array, or cluster. The elements must be all

controls or all indicators.

coercion dot A gray dot on a terminal to indicate that one of two terminals wired together

has been converted to match the data type representation of the other.

connector Part of the VI or function node that contains its input and output terminals,

through which data passes to and from the node.

connector pane Region in the upper right corner of a front panel window that displays the

VI terminal pattern. It underlies the icon pane.

constant See universal constant and user-defined constant.

data flow Programming system consisting of executable nodes in which nodes

execute only when they have received all required input data and produce

output automatically when they have executed.

deadband In process instrumentation, the range through which an input signal can

vary, upon reversal of direction, without initiating an observable change in

output signal. Deadband is usually expressed in percent of range.

See log deadband and update deadband.

device An instrument or controller that is addressable as a single entity and

controls or monitors real-world I/O points. A device is often connected to

the host computer through some type of communication network, or can be

a plug-in device.

device server An application that communicates with and manages a peripheral hardware

device such as a Programmable Logic Control (PLC), remote I/O device or

plug-in device. Device servers pass tag values to the BridgeVIEW Engine

in real time.

discrete tag A two-state (on/off) value representation of a connection to a real-world I/O

point. In BridgeVIEW, this type of tag can be either a one (TRUE) or a zero

(FALSE).