problems with DAQ on PDA with CF 6004

[sarahk]

Hi, Eran.

To answer your first question, there's an Express VI that does exactly what you describe. It's called Elapsed Time, and you can find it on the Functions>>Programming>>Timing subpalette.

[Javo]

Hello,

 I have the same problem as Eran. I am trying to sample 4 channel (with acelerometers) continuously at rates of 4096 Hz. I dont want present data on the screen of the PDA. I want save data into a file. The program stop with an error (2000361) and the file doesn´t contains all data. How can I do to solve this problem?.

I have attached my VI.

Thanks.

[Corby_B]

Hello Javo,

Thanks for your post.

Take a look at the link below as I beleive it will solve the issue you are having.

Error -200361 While Performing Data Acquisition on a PDA

Also what Operating system are you using this device on? There have been documented issues with this error on an XP machine with Service Pack 1 installed. See the link below.

Error -200361

The error for this link is a little more specific to certain devices but could apply in your situation.

Please reply if you have more questions.

Corby_B

[Javo]

Thanks Corby for your reply.

I have changed my VI but i have the same problem. After conitnuous runnig of about 2 minutes i got the error message "200361".

I put the IO "write to text file" outside the loop While as recomendations that you sent me says.

I think that the problem is the PDA ( Acer n50) , but i don´t know.

I have attached my VI. If you have any suggestion, would you mind send to me, please.

[Eriquito]

Javo,

Do you have any other PDAs you could try it with?  How fast is the processor in your PDA?

[Javo]

Hello Eriquito.

The processor in my PDA is:  Intel(R) PXA272  312 MHz.

I want to acquire data at rates of 4096 Hz with 4 channels. Do you think that is a high rate?.

Thanks.

[Nathan_R]

Hi Javo,

You can try simplifying the way you are combining your data every loop iteration. This will let the loop execute faster and possibly read the data without error. Make sure to set the build array block to concatenate inputs. This can be selected by right clicking on the build array block. I’ve included a screenshot of one way to simplify the concatenation. If this does not work I would try lowering the sample rate until you can acquire without error. Let me know if you have any questions.

Thanks,

Message Edited by Nathan_R on 05-15-2008 05:01 PM