Calling Real-Time Sequence directly from LabVIEW/Teststand

[rajamodol]

Hi Boards,

Perhaps it is a simple questions, but before i run to the wrong way, better to ask... 😉

1. Is it possible to call RT-Sequence directly from LabVIEW/Teststand without using stimulus profile?

2. I want to manage my test through teststand. It means, i need to pass parameter from teststand to RT-Sequence, is it possible?

    If it is not possible, how can i pass parameter from teststand to stimulus profile? So, in the end, i will call stimulus profile from teststand.

Any example program will make my life easy... 😉

Thanks!

Rajamodol

[HoussamK]

Hi,

You can use the Stimulus Profile API

Use this API to automate the configuration and operation of real-time sequences and stimulus profiles

You can use the VeriStand APIs and extendibility to meet your needs. you can Call NI VeriStand from any .NET environment 😉

NI TestStand Sequence Files to run Stimulus Profiles in NI VeriStand

[rajamodol]

Hi hsm78,

I figured there is a way to automatically calling stimulus profile via .NET API.

But, how can i modify the parameter, i.e., i want to modify Initial Value, Final Value of ramp.nivsseq from stimulus profile? I don't see so far how to programmatically modify it.

The only possibility is to play with XML file where my stimulus profile stored those values. But, i think it is not the comfortable way, is it?

In other posting, there is also solution to create stimulus profile and RT-sequence programmatically with labview. There will be then possible to input any parameter to stimulus profile>RT-sequence.

But, i want only to change the parameter input, not to create every time the stimulus profile...

Any idea?

Thanks again,

Rajamodol

[HoussamK]

Hi,

have you seen the examples in  C:\Program Files\National Instruments\LabVIEW 20XX\examples\NI Veristand\API\Configuration API\Sequences  ?

where XX is your LabVIEW Version you're using

The two VIs Create Basic Real-Time Sequence.vi  and Create Advanced Real-Time Sequence.vi are good to understand how to use the API

[rajamodol]

Hi hsm78,

thanks for your info. I have tried both examples. Both example will create a new RT-Sequence and set the value parameters. I would try first not to use this method.

I want to have the following scenario:

Scenario I:

- RT-Sequence and Stimulus Profile is created directly with editor.

- Teststand will pass parameters to stimulus profile and run the stimulus profile editor.

Scenario II:

- RT-Sequence is created directly with editor

- Test stand will pass parameter to RT-Sequence and run it.

Which one is possible? and how?

Regards,

Rajamodol

[StephenB]

Hi Rajamodol,

You're right, those examples create sequences... they don't run them. The examples you want to look at are here:

C:\Program Files (x86)\National Instruments\LabVIEW 2012\examples\NI Veristand\API\Execution API\Sequences\

Those are closer. I've also attached a few examples here. They run a seq directly and also run a stim profile, after setting parameters. This creates a new stimulus profile but its an easy modification to open an existing.

[StephenB]

You might also want to check out the NIVS custom steps for NI TestStand that handle this low level stuff for you

https://decibel.ni.com/content/docs/DOC-25218

[rajamodol]

Hi StephenB,

Thanks for your info. I have tried your solution. Yes, it it closer to what i need. Now, i am trying to rewrite the code in Teststand with using .NET API. Now, i have another question. In Labview, we can easily close an opened reference. How to do it in Teststand? Is there any function in .NET API? Or, can i just link my object reference which was opened in Testand, to labview and close it there?

Regards,

Rajamodol

[rajamodol]

Hi StephenB,

I tried to add log file function to your example  Play Waveform sequence.vi ‏20 KB, unfortunately did not work.

I added the funcion from pallete NI Veristand>>Execution>>Data Logging: Open Data Logging Manager Reference.vi and Start Data Logging Session.vi. The output of last vi does not match with Open Stimulus Profile Session.vi.

How can i log the waveform of  Play Waveform sequence.vi ‏20 KB with using labview? 

Thanks!

Rajamodol