Work with the NI USB-6353

Hello, everyone!

I m using USB 6251 OEM for more than two years without major problems, but my applications are increasingly complex and OR start offering NI USB 6353, with many improvements, mainly on the transfer speed.

     My problem is: using 6251 I run an application that generates analog data with 100KS/channel (2 channels) and generates a digital stream data with 1MHz, 8 bits wide. Both tasks are Nsamples mode, without regeneration and can´t stop or loose data while running. It works really fine on 6251. On labview, just changing the necessary (using Daq Assisant to replace tasks) to use 6353 an error message appear on screen:

"Overflow memory on-board unit. Due to the limitations of system and/or the bandwidth of the bus, the driver could not write data to the device fast enough to track the rate of output of the device. Reduce your sampling rate, or reduce the number of programs that your computer runs at the same time. »

If 6353 is faster than 6251 why this error just on 6353? 6353 is worse than 6251 inthis?

Cristiano

Hi André,.

I m waiting for a work around to fix this bug. In my application, I use this way to generate waveforms for more control. The application control how many cycles is generated on each stage, based on digital input, digital output stream is also controlled. In this way is really important have these two tasks running at the same time. We have the same tasks on 6251 and we decided to migrate to 6353 because it has more channels and improvements on communication.

Thanks for everything and I m waiting for a report to correct this bug.

Cristiano

Tags: NI Hardware

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