Viewing more values on Graph from DAQ Card

[Abuzar]

Hello,

I am acquiring a Signal using DAQ Card, the problem is that i can view only few values on the Waveform Graph. Kindly guide me if i want to view more points on the waveform graph, what should i do in my programming window.

Regards

[GerdW]

Hi Abuzar,

generic answer for your generic question: collect more data in your data buffer…

- Have you looked at all the example VIs coming with LabVIEW?

- Have you taken all those free beginner courses offered by NI on their website?

- Have you considered to attach your VI to get more specific comments and answers?

[Abuzar]

Thanks alot, i will try the buffer input, i think it will work.

Regards

[Abuzar]

I am attaching my VI which is very simple, i am just collecting and plotting the signal.

Since my signal is of low frequency, i can view only single peak, but i want to view more than one peaks.

I think for that i have to collect more than this number of data and plot it on the graph.

I couldn't find any buffer that can take the express signal input.

Kindly guide me what should i do.

Regards

[GerdW]

Hi Abuzar,

can you attach your VI in LV2011, right now I'm limited in the LV versions I can use…

[Abuzar]

Dear GerdW,

I am attaching the file in 2011 version, Pls check.

Thanks

[GerdW]

Hi Abuzar,

your VI is just an expressVI and a graph - nearly to nothing…

- Why do you set the DAQAssistent to "limited number of samples", when you want to have a continuous measurement?

- Did you look at the example VIs coming with LabVIEW? Those that explain DAQmx functions?

- A graph only displays the data in the wire you feed to. When you want to display more data you need to collect it. When you really want to stick with expressVIs then you could use the one, which allows appending signals…

- Learn to use shift registers!

[crossrulz · Accepted solution]

I think you just want to use a CHART instead of a Graph.  A Chart has a history associated with it, so it shows more than just the last set of data you acquired and wrote to the graph.

[Abuzar]

Thanks alot all of you for you kind help.

Regards