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plot a graph and show on a pop up
serialdaq
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06-13-2013 06:22 AM
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Hi,
Im developing a test execution in test stand which reads a waveform from NIPXI 5124 with ReadWaveform() function and get the data as an array.Now I want to plot this array content as if viewving the scope monitor ( as you know there is no monitor of 5124) , and show it to the operator asking if the wveform is similar to the waveform expected. only visual similarity is enough for us. I tried to use zNi TestStand graph control.ocx as activex control but I could not succeed.Because I dont know what to select for object reference and other variables.I could not find any example for test stand and cvi application on net or teststand examples directory.I' m not sure that I'm on the right way.Could you please send me an example for suca a case.Or is there any alternative way to create an application which plots a graph of the waveform measured and shows as a pop up picture?
waiting for your immediate reply.
Regards
Rodéric
Active Participant
06-13-2013 08:13 AM
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Why don't you just pass the array as an input to another step of your sequence (you just have to create a step in CVI that plots the graph and waits for user input saying OK or NOK). This should be a really straight forward approach
Hope this helps
Rodéric L
Certified LabVIEW Architect
Certified LabVIEW Architect
06-26-2013 02:57 AM
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hi thank you for your reply. I found a function plotwaveform in cvi.dll.But it needs a panel handle.But I use teststand and I do not have a user intsrface that I can set as panel handle.So can you recommend a function that can save the graph as a file (like .jpg, .bmp) that I can show it in a pop up message in the next step.
regards
RaviShrigiri
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06-26-2013 06:04 AM
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You can use graph.cws example for your use case.
This displays graph in CVI.
Please note you can display CVI UI from TestStand also.
Run the test sequence in the folder: C:\Users\Public\Documents\National Instruments\TestStand 2012\Examples\Demo\C
This example also popus up a CVI panel.You can re use this example or use the graph.cws from CVI or a combination of both.
If you are comfortable with Labview you can use the same.Display a graph from an array.
Connect the array to the connector pane.
Call this VI from TestStand and send the array.
FYI - TestStand sends the array info to CVI code.
CVI displays the graph ( CVI needs panel handle and not TestStand).
On clicking quit the CVI is exited and control comes back to TestStand.
Please try and If you are still facing problem please let us know i can make a simple DLL for you to display your graphs.
