Can I take synchronous data from 2 NI9215/USB-9162’s using VI-Logger Lite

[Ted75zcar]

I am a total noob, so this may be posted (although I have done a search and can not find the direct answer)

We have 2 NI-9215 / USB-9162 devices that we want to take synchronous data from using VI Logger.  When these devices were sold to us, we were told that this was possible, but it appears as if it is not.  Both devices appear in the Devices and interfaces pull down, and I can operate either one of them separately, but not together.

Thanks

[Nicholas_B]

Hi Ted,

Do you have each card's acquisition set up in a different VI Logger Task?  This is the only way to accomplish logging from multiple devices. 

Try setting up two VI Logger Tasks - one for each device's acquisition - and let me know if that works...

Regards,

Nicholas B, National Instruments

[Ted75zcar]

Thanks for the Reply,

I can set up 2 different tasks, but this presents a different set of problems:

1)  The tasks are not synchronous, so the time base for the two data sets is not the correlated

2)   It does not seem to like to run 2 tasks at one time

[Nicholas_B]

Hi Ted,

Since you have to run the two acquisitions in different tasks, they are run independently and cannot be synchronized.  Is there a way for you to specify a start trigger for the task?  Also, what do you mean that "it doesn't like running two tasks at once"?  Does it slow down your computer performance?  What are the specs of your computer?

Regards,

Nicholas B, National Instruments