Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Hi! I am using LabVIEW 8.5 and I am trying to display a certain number of channels using multiple channels ... I can display them in a graph, but I am displaying the 16 analog input channels that NI 6024E have and I need to display only the channels that have something connected to them (I do not know which channel will have something connected to it). If they have a signal (temperature), I will like to display that channel/s in a graph and save that channel/s in a txt file. If not I do not want to show or save the channel/s. How can I do that using DQA Assistance? I am able to do all this using one channel, I can display in a graph, I can save it in a txt file, but I am not able to do it for n number of active channels only. Any advice or suggestion will be appreciated. Sincerely, Julieta.

The "AI Multi Pt" sounds like an old Traditional DAQ example. The DAQ Assistant uses DAQmx, and it hides a lot of code. This is both good and bad. Good if you don't need to change anything. Bad if you do. I don't know the way you've set up the task, but you can do what you want by simply using the DAQmx VIs directly. There are many examples that ship with LabVIEW. Open the Example Finder (Help -> Find Examples) and navigate to the Hardware Input and Output -> DAQmx -> Analog Measurement. I'm not sure whether you need to go into the Temperature directory or the Voltage directory because like I said, I don't know how your task is set up. Let's take a simple example. If you open the "Acq Themistor Samples-SW Timed" in the Temperature directory you can see it's pretty simple. The very first VI is the DAQmx Create Channel VI. This has a "physical channels" input. This can be a DAQmx control or it can be a string where you specify the list of channels to collect. So, to do what you want you just need to create the string corresponding to the channels that you want to collect. The LabVIEW Help describes how to create this string. The alternative method is to use the technique that aestat shows. However, what's shown is only part of what you'd need to do. You would need to have a pre-created array of the channels and then you need to select the ones you want. See attached example (LV 8.2) for an idea.

LabVIEW

How to display a certain number of channels...

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Thanks a lot guys... 🙂

Now on LabVIEW 10.0 on Win7

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How to display a certain number of channels...

Re: How to display a certain number of channels...