National Instruments BridgeVIEW - Manual (Page 83)

Chapter 3 Tag Configuration
© National Instruments Corporation 3-25 BridgeVIEW User Manual
How Do You Configure a Tag
to Log Its Data or Events?
While editing a tag, click on the Log Data or Log/Print Events checkbox.
If you want to log historical data or events, the BridgeVIEW Engine must
have these processes enabled. To turn them on, open the Engine Manager
and turn on the processes with the panel buttons, or configure the Engine
to turn on these processes automatically at startup by selecting Configure»
Historical… or Configure»Events… from the Tag Configuration Editor.
You also can enable these parameters programmatically with System VIs
that enable event or historical data logging.
How Do You Set Initial Tag Value at Startup?
While editing a tag, select the Set Initial Value checkbox. Then enter the
initial value in the adjacent Initial Value field.
Scaling
These attributes include what type of scaling to perform on a tag when
communicating with the device server and the expected engineering range
and units for the tag.
Table 3-5, provides descriptions of the scaling configuration attributes,
and indicates the data types to which each attribute applies. For tag
attribute information about the other configuration categories, see
Tables 3-1, 3-2, 3-4, and 3-7.
Table 3-5. Scaling Configuration Attributes
Attribute
Applies to
Data Types Description
Raw Full
Scale analog Determines the full scale (maximum) value used by the server
for a tag.
Raw Zero
Scale analog Determines the zero scale (minimum) value used by the server
for a tag.
Eng Full
Scale analog Determines the full scale (maximum) value used by the
BridgeVIEW Engine and the user application for a tag.
Engineering Full Scale must be greater than Engineering
Zero Scale.