HAVE fast acquisition after the signal from trigger-DI

Hello world

the work of the VI I train is basically very simple:

There are 8 analog inputs, which need to be given reading a entry digital-trigger after.

Parameters: frequency of sampling per channel: 2 ms/s, number of samples per channel: 1024

This acquisition is very often repeated (1000 x +). So I put the trigger and the part of reading inside a while loop. The task initialization happens before this loop and the task is closed later.

The problem that I have is the speed! The acquisition itself (1024 samples/channel to 2 ms/s/channel) should (in theory) be done in the ~0.5ms but actually lasts longer...

My goal is to make the process: trigger-> acquisition in 2ms. He is currently, reliable with a rate of repetition of 15ms. ~

Do you know the guy in any way to increase the speed? I played a bit with manually set size of buffer and initialize a task dedicated for the trigger itself. The two does not improve it.

Hardware DAQ-I'm by train is USB6366 and a system of SMU with a PXIe6368 inside.

I don't really know where this quite simple line, time is lost...

Best regards and thanks,

Michael

Hello mschoeff,

If I understand you correct you want to retrigger the acquisition. Then you must

Configure the trigger outside all loop and use the node property to enable the trigger.

Here is an explanation:

Support for redeclenchables tasks on X Series multifunction data acquisition cards

It may be useful

Tags: NI Software

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