National Instruments BridgeVIEW 用户手册
Chapter 1 Introduction
© National Instruments Corporation 1-5 BridgeVIEW User Manual
• Attribute Nodes—
you can use to control the appearance and functional characteristics of
controls and indicators. For more information about attribute nodes,
refer to Chapter 13,
controls and indicators. For more information about attribute nodes,
refer to Chapter 13,
.
• Arrays, Clusters and Graphs—An
is a resizable collection of
is a statically sized collection
of data elements of the same or different types. Graphs commonly are
used to display data. For more information about arrays, clusters, and
graphs, refer to Chapter 14,
used to display data. For more information about arrays, clusters, and
graphs, refer to Chapter 14,
.
• VI Server—The VI Server allows you to control when a VI is loaded
into memory, run, and unloaded from memory. For more information
about VI Control VIs, refer to Chapter 15,
about VI Control VIs, refer to Chapter 15,
.
Tag Configuration
A tag value is acquired and/or controlled by a device server that
communicates with the BridgeVIEW Engine and can be read or set by
a VI in your HMI application. Tags can be of the following types: input,
output, Input/Output, or memory. You can configure tags through the
Tag Configuration Editor. A tag configuration consists of its data type,
connection, scaling, operations, and alarms settings. For more information
about this topic, refer to Chapter 3,
communicates with the BridgeVIEW Engine and can be read or set by
a VI in your HMI application. Tags can be of the following types: input,
output, Input/Output, or memory. You can configure tags through the
Tag Configuration Editor. A tag configuration consists of its data type,
connection, scaling, operations, and alarms settings. For more information
about this topic, refer to Chapter 3,
.
Data Type
A tag data type can be analog, discrete, bit array, or string. Analog tags
have continuous values with a specified range (such as 0.0 to 100.0).
Discrete tags have values that are either ON (1) or OFF (0). Bit array tags
are comprised of up to 32 bits, each of which can have an ON (1) or OFF (0)
state. String tags consist of ASCII characters or binary data and can be of
any length.
have continuous values with a specified range (such as 0.0 to 100.0).
Discrete tags have values that are either ON (1) or OFF (0). Bit array tags
are comprised of up to 32 bits, each of which can have an ON (1) or OFF (0)
state. String tags consist of ASCII characters or binary data and can be of
any length.
General
General includes the following tag attributes:
•
Tag name
• Tag description
• Tag group
• Length (for bit array and string tags)