Time Axis on Waveform Chart porblem

[plpablo]

yes I did checkout examples and I was looking for the way to add time at a to ddt. 

You sed do not get used do DDT. OK I am looking or example how to acquire data from AI without ddt 

[GerdW]

Hi pablo,

how to acquire data from AI without ddt 

Do you spot the DAQmx function in my image above?

It's set to "1 chan N samples" and outputs a waveform…

(I think all DAQmx example VIs don't use the DAQAssistent!)

[plpablo]

Hi GerdW, 

I changed measurement technique as you suggested and used part of your code. But still have problem with time axis ( is not showing time) please have look on screenshots.

Best Regards  

[GerdW]

Hi Pablo,

your graph clearly shows relative time on its X axis!

What's the problem here?

[plpablo]

HI GerdW, 

time on axis is 6 hours 29 minutes 33 second but in real word measurement was around 5 seconds.

Best regards 

[GerdW]

Hi Pablo,

I repeat from the start: you need to check the data you have wired to your graph/chart!

Can you attach your VI with some data from a real measurement inside? (Run the VI until you have some data in the plot. Stop the VI. Edit menu -> set all values to default. Save the VI. Attach it here.)

[plpablo]

Hi GerdW,

about the data:

I put probe to collect it- in attachments :

1) graph3.PNG - graph from program 

2) probe graph 

3) probe table 

When i Stop my VI and reinitialize graph to default values it looks like there is some time data - picture graph-time.

so i delete graph and put new one (new graph png) and problem is still there 

[GerdW]

Hi pablo,

unfortunately you still don't attach your VI as requested.

We cannot debug images using LabVIEW…

What I see:

- the waveform is set to dt=0.001s, this seems to correlate with the sample rate of 1000Hz you used in one of your older images.

- The graph shows a large time (like 23mins) in your image:either there is a lot of data or you applied some scaling to the x axis. (Again: you didn't attach a VI so we cannot debug it.)

[plpablo]

looks i found the way 

[GerdW]

Hi pablo,

for a graph you should not need to change the x scale multplier like you do.

But again: without your VI we cannot debug…