National Instruments BridgeVIEW

Chapter 11 Loops and Charts

Front Panel

1. Open a new front panel by selecting File»New.

2. Place a Vertical Switch (Controls»Boolean) on the front panel.

Label the switch Enable.

3. Use the Labeling tool to create free labels for ON and OFF. Select the

Labeling tool, and type in the label text. With the Color tool, shown at

left, make the border of the free label transparent by selecting the T

in the bottom left corner of the Color palette.

4. Place a waveform chart (Controls»Graph) on the front panel.

Label the chart Random Signal. The chart displays random data

in real time.

Note Make sure that you select a waveform chart and not a waveform graph. In the

Graph palette, the waveform chart appears closest to the left side.

5. Pop up on the chart and choose Show»Palette, and Show»Legend to

hide the palette and legend. The digital display shows the latest value.

Then pop up on the chart and choose Show»Digital Display and

Show»Scroll Bar.

6. Rescale the chart from 0.0 to 1.0. Use the Labeling tool to replace the

HI limit of 10.0 with 1.0.

7. Place a knob (Controls»Numeric) on the front panel. Label the knob

Loop Delay (sec). This knob controls the timing of the While

Loop. Pop up on the knob and deselect Show»Digital Display to hide

the digital display.