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Chapter 3 Tag Configuration
BridgeVIEW User Manual 3-2 © National Instruments Corporation
General Attributes
General attributes include data type, maximum length for string and bit
array tags, and the name, description, and tag group of the tag. The
BridgeVIEW system supports four types of tags: analog, discrete, string,
and bit array. These types differ by the inclusion of attributes within the
operations, scaling, and alarm categories. The tag type is fixed when it is
created. You must use the tag name to identify a particular tag. For
information on how to configure the general attribute of a tag, see the
General section later in this chapter.
Connection Attributes
I/O connection attributes describe where the Engine sends or receives
values for the tag and how to access that data. These tags have access rights
of input, output or input/output. To configure the I/O connection attributes
of a tag, refer to the Connection section later in this chapter.
Memory tags are not connected to a real world I/O point. Memory tags
provide more complex monitoring, alarming, or control. For more
information about memory tags, see the What Is a Memory Tag? section
later in this chapter.
Operation Attributes
Operation attributes describe additional functionality that the Engine
performs on a tag or its values. These operations include tasks such as
setting initial values and enabling logging operations. To configure
the operation attributes of a tag, refer to the Operations section later in
this chapter.
Scaling Attributes
Scaling attributes describe what linear scaling function is applied to a tag's
value. Scaling is useful for converting the range of values from measured
units into a calculated range. Only analog (numeric) and Bit Array tags
have Scaling attributes. To configure scaling attributes of a tag, see the
Scaling section later in this chapter.