Measurement-computing ULx for NI LabVIEW Quick Start Bedienungsanleitung PDF herunterladen (Seite 4)

Quick Start: MCC ULx for NI LabVIEW Build the NI LabVIEW program

Build the NI LabVIEW program

The following exercise shows you how to create a program that acquires data from an MCC device, displays the

data in a waveform, and saves the data to a file. The MCC USB-1608GX-2AO device was used for this

exercise.

To create the source code for the program, complete the following steps:

1. Start LabVIEW and open a blank VI or empty project.

2. Display the block diagram window if it is not already open.

3. Select View»Functions Palette to display the Functions palette.

4. Select User Libraries»ULx for NI LabVIEW to display the MCC ULx VIs.

Create an analog input voltage channel

1. Select ULx for NI LabVIEW»Create Channel and place the ULx Create Virtual Channel VI on the block

diagram.

Tip: To show a text label on the block diagram, right-click on the VI and select Visible Items»Label from

the shortcut menu.

2. Right-click the physical channels terminal and select Create»Control.

3. Add a control to the minimal value terminal.

4. Add a control to the maximum value terminal.

Add a sample clock

1. Select ULx for NI LabVIEW»Timing and place the ULx Timing VI on the block diagram.

2. Add a control to the sample mode terminal.

3. Add a control to the samples per channel terminal.

4. Add a control to the rate terminal.

Specify when to start the acquisition

Select ULx for NI LabVIEW»Start and place the ULx Start VI on the block diagram.

Acquire data

Select ULx for NI LabVIEW»Read and place the ULx Read VI on the block diagram. Use

the polymorphic VI selector to select the Analog Wfm 1Chan NSamp instance.

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Measurement-computing ULx for NI LabVIEW Quick Start Bedienungsanleitung Seite 4