Measuring Current Sub VI doesn't work

[Valve]

Hi everyone,

I'm new to labview and I'm trying to solve my programm without express VI's. Now I would like to make a sub-VI for the current measurement. The sub-VI itself works and I get values from it but if I call the sub-VI in another VI I don't get any values.

I hope you can help me.

Thank you

Greatings

Eric

[GerdW]

Hi Valve,

THINK DATAFLOW!

You get values from a subVI, when it finishes execution. Your subVI needs to get stopped by a button before it finishes execution. This is very basic LabVIEW stuff!

Again: THINK DATAFLOW!

[Valve]

Hi GerdW,

first of all, thanks for your quick reply.

This means I have to stop the while-loop of the Sub-VI or how can I stop the Sub-VI otherwise? I'm sorry for my bad knowledge. As I told I'm totally new to LabVIEW or any other programming software except Siemens.

Greetings

Valve 

[GerdW · Accepted solution]

Hi Valve,

as easy as it is: don't use any while loop in the subVI!

Other option:

Learn LabVIEW, and learn about producer-consumer scheme. Then use a queue to send data from DAQ loop to UI display loop…