queue for array and while loop

[mischi_miyagi]

Hi,
I've got the following problem: I want to generate a waveform chart which should contain at the beginning 20 values read from an array and then it should contain measured values from a while loop until I stop the while loop.
When I tried this and I loop the dequeing element it reads only the values from the while loop, when I'm not looping it it will only read the array?!

Mike

[mischi_miyagi]

Hmmm,
ok, found out that it was the "clear history" property note...so problem seems solved. But is there a solution that the history should only be deleted at the beginning of the VI?

Mike

[TCPlomp]

Use the FirstCall? vi.

It is located at different points in different LV versions, so use search.

Ton

[mischi_miyagi]

Thx, works just fine.

Mike

[jamie310382]

Hey guys, I think maybe you can help me. At the moment I am logging 2 values (pressure and Acoustic emissions) to a file at 40Hz. I want to be able to populate an XY chart on screen when I fnish logging (stop the while loop) I have attahced my VI for reference: Any help will be greatly appreciated as I am fairly inexperienced using labview.

Thanks

MY PREVIOUS POST:

Hi, Hopefully someone can help. I have attahced my VI.

I am happy with how to write data to a file, which I have already done. The next thing I want to do, is write the pressure and acoustic values to an array for the duration of my testing (Testing is when the log switch is on). Once I switch the log button on my front panel off, I want to be able to call another VI which will display an XY graph of the Pressure and acoustics Vs Time. This will be populated from the array I create. Can anyone please help.

Thanks in advance.