National Instruments BridgeVIEW User Manual download pdf (Page 403)

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Appendix A HMI Function Reference

Get Tag Range and Units

Use the Get Tag Range and Units VI to obtain the engineering range for the tag in a cluster

of Minimum, Maximum, and Increment. You can wire this format to a scale attribute node

for a graph, slide, or vessel. Increment is set to 0, which means that BridgeVIEW calculates

the scale increment automatically. units is the tag engineering units.

tag name is the name of the tag about which you want to obtain

information.

error in (no error) is a cluster that describes the error status before this VI

executes. For more information about this control, see the section Errors

Not Reported by the BridgeVIEW Engine in this appendix.

eng range is the range of the tag in engineering units. If you are plotting

data on a chart, waveform graph, XY graph, slide or vessel, you can wire

this output directly to the X Range (All Elements) or Y Range (All

Elements) Attribute Node.

Minimum is the user defined minimum tag value.

Maximum is the user defined maximum tag value.

Increment is the delta in which the value increments. It is not a

user defined value and is always 0. Increment determines how

the chart or graph computes an increment based on the Minimum,

Maximum, and the data set being plotted.

units is the name of units for engineering values. This parameter applies

to analog tags only. For discrete, bit array, and string tags, units is an

empty string.

error out is a cluster that describes the error status after this VI executes.

For more information about this indicator, see the section Errors Not

Reported by the BridgeVIEW Engine in this appendix.

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