PCI6251 write the last N points into a text file

[youngwater]

Hello,

I am using PCI 6251 and SCB-68pin E series connections and Labview 8.

I realised Retriggerable Acquisition by using an example program (NI-DAQmx:Retriggerable AI Using Counter and an Analog Trigger, Filename: retrigg_ai_analogtrigger.vi).

In this vi, I would like to write the last N points acquired (my sample frequency is 1MHz, the number of points N=100000) into a text file.

Which blocks I should use, in which order I should put the tasks (e.g. open file--> Mdaq acquisition-->write into file)

many thanks,

YW

[Michiel_H]

I suggest you take a look at the labview examples about file I/O. Go to Help --> Find Examples --> File input and output. Here you will find a lot of examples about how to use file I/O depending on the file format