How to Use Select Signals Express VI without Boolean Array

[Cruiser]

Hello, I just started using LabVIEW a couple of weeks ago and I've run into a snag.

I am reading in four input channels on a NI USB-6009 using the DAQ Assistant. I am able to select which channels to display using the Select Signals Express VI and a boolean array input. However, I would like to do some basic measurements (voltage, frequency, phase) by selecting each channel individually. I've tried to use Numeric Control, Menu Ring, and Enum inputs, but they all do the same thing: when the input is equal to or less than zero, Select Signals returns no signals, and when the input is one or greater, it returns only the first channel. How do I get Select Signals to return channel 1 when I input 1, channel 2 when I input 2, etc...?

[aeastet]

Can you send your code so we can see what you are doing?

[Cruiser]

Here it is.

[smercurio_fc]

What you are seeing with the Select Signals Express VI is by design, and documented in the LabVIEW Help. If you want to use a ring to select which signal to display then you need to convert the numeric value to a Boolean array. What you want is the 2^n value. In other words, something like this:

[RavensFan]

Why don't you want to use a Boolean Array?

Look at how that Express VI is being used by opening up the example Select Signals.vi in the Example Finder.

[aeastet]

Have you tried to make the lines visible or not as follows.

[Cruiser]

Re: smercurio_fc

Thanks, that works pretty well.

[fil-leep]

Hellow  i am having ten signal and  i what to use only one display(graph) to show one signal at a time by using push button at signal.if one button is active the selected signal should be displayed and other signal should not be displayed i need your help

[smercurio_fc]

Replace the ring control with a radio button group.

[Matt_McLaughlin]

Hi Fil-Leep,

You may want to check the LabVIEW Help on Radio Button Controls for a basic discussion of setting up a Radio Buttons and how they are used. This article will also point you to a couple of examples in LabVIEW illustrating the use of Radio Buttons.

I hope that helps!