Problem with 6071E to write data on file?

[drikc]

Hi,

I would like to save my value from analog input of my 6071E card on a text file, I've only on channel selected but when I run my program I've an error.

I'm in continuous mode but over than 10kHz and 10000 samples the program doesn't work, and I need to be at 100k or 1MHz.

Thanks a lot

Under labview 8.0

Message Edited by drikc on 01-23-2007 06:18 AM

Message Edited by drikc on 01-23-2007 06:18 AM

[Norbert_B]

drikc,

you are running into a perfomance-issue here.
There are two ways to solve the issue:
a) Buy a faster PC....
b) instead of just configuring your application you should start to programm it.
Regarding b) i'd advice you to take a look into the "Cont Acq&Graph Voltage - To File (Binary).vi" which is installed with DAQmx. You can find the example in the example finder of LabVIEW.

hope this helps,
Norbert B.

[drikc]

Thanks Norbert,

To change the computer, I forget this solution but, it would be easiest.

For the programming, indeed I've already looked the "Cont Acq&Graph Voltage - To File (Binary).vi", but the file is binary and I need to write voltage value, so text file.

I'm going to concentrate myself on this exemple.

Thanks

[Norbert_B]

drikc,

if the file-format is the only headache for you in this example, then the solution is very easy: Just replace all binary-functions from the file IO with appropiate ASCII-functions. Of course, you have to convert your data into string(s) first.
Since ASCII files are very slow compared to binary and the conversion takes time as well, you have to benchmark if you achieve the performance you need with this mechanics....

Norbert

Message Edited by Norbert B on 01-26-2007 02:08 AM