How to display dynamic datas and double datas (chart)

Hi all !
I would like to display dynamic datas and double datas by using charts.
However, it doesn't work and I don't understand why.
Can you help me to fix that ?
Best regards,
- John
Attachments:
double_dynamics_data.vi ‏54 KB

Hi John,
the sine looks like it should look with your VI!
You convert the DDT to a scalar DBL. That conversion will only use the first sample of the generated sine waveform - usually this is always the same (offset) value when you generate full periods… Or to put it in a mathematical expression: sin(0°)+4 = 4!
When you want to display waveform you should work with waveforms!
Actually, I have used Dynamic data type in order to simulate an signal.
Well, I also simulated a signal in my example VI. I didn't use any ExpressVI to do so…
In a few weeks, I will receive a sensor. I will use in LabView 'DAQ Assistant' whose the ouput is a Dynamic Data.
Nobody forces you to use the DAQAssistent ExpressVI. There are nice DAQmx functions available and LabVIEW comes with a lot of ready-to-use example VIs…
That's why, I used in first place, the 'Simulate signal'. So I think I should keep Dynamic Data Type
I do think you don't need to use the DDT. I think it's better to understand what is going on in your VI. And I think the DDT will be no help for you…
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
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