Variable between TestStand and Labview

[Vincent90]

Hi all,

I am searching for a tutorial giving an example of how to use TestStand Toolbox in Labview to communicate with TestStand.

I am merely new in that kind of programming and even after doing the "Using TestStand.pdf" NI Tutorial, i didn't get how data can exchange.

Thanks

Vincent

[Rodéric]

Hi,

There are multiple ways to that, what kind of communication do you need? You need to pass data once in a while, or is it intensive communication?

Regards,

[Vincent90]

Hi Roderic,

Just to be get used to data transfert between the two soft, i first want to try pass data once in a while but for my further application i will have to implement intensive communication.

BR,

Vincent

[Vincent90]

Hi,

I managed to read VI File from TestStand using a VI which just do a sum (x+y) with a stop button.

In TestStand, I don't manage to read back x+y variable in order to say if x+y > 54 then false.

In the expression browser i think i shoul read back that value but i can't find it.

BR,

Vincent

[Rodéric]

Is it an independent VI, or does TestStand runs it? You can write to a TestStand Local variable from the VI using the TestStand API.

[Vincent90]

Does a tutorial exist ?

BR,

Vincent

[Rodéric]

I am not sure a tutorial exists,

Access globals: https://decibel.ni.com/content/docs/DOC-11447 

You may find those links usefull:http://www.ni.com/pdf/manuals/323435a.pdf   http://zone.ni.com/devzone/cda/epd/p/id/5838   

You can access a lot of thing using the API shipped with TestStand (located in your labview: teststand palette

[RayFarmer]

Can you post your example sequencefile and VI?

[Vincent90]

Thank you both of you,

I managed to do what i wanted to do.

VI ; My VI was operating an operation (sum) between two variables X and Y.

the resuslt was X+Y. (called xplusy)

My sequence file;

I called my VI in dialog box mode,

I created a local variable called xplusy which I gave no value,

In the module VI Called, i set an expression value to xplusy which seems to comunicate directly with my local parameter.

I managed to compare the two value in a "If" loop.

My newest question is how to change X and Y parameters directly from TesStand.

I tried setting attributes to x and y command and adding in the setup step a Property loader.

TestStand get back an error saying x and y are not used.

[Rodéric · Accepted solution]

Hi,

In the module adapter pane, you have to drop a TestSTand local variable (or an expression) in the value colum. Uncheck Default check box and remove the attributes and it should work just fine.

Regards,