07-01-2011 05:02 AM
Lately, I have been using an Iotech Daqboard 505 combined with DasyLab. That board has maximum sample rate 200000 samples/sec. Unfortunately, when I set that sampling rate into Dasylab I get instantly a daqboard runtime error – “The device entered an offline state”. By reducing the sampling rate I can increase the duration that everything works fine. So far the rate that looks to have no problems is 5Hz.
What can I do so that I can utilize my card’s maximum sampling rate?
I have been told that enabling DMA bus mastering on the PCI slot that the board is installed is the solution. Is it correct? If so, how could that be done?
Thanks in advance
07-01-2011 08:39 AM
Run the Resource Test found in the Daq Configuration utility – make sure to close DASYLab first. The Resource Test will provide a good idea of how fast the board can transmit data. If the Resource Test fails and the problem is bus mastering then I believe the error message will indicate so . Otherwise, contact Measurement Computing directly.
07-03-2011 03:14 AM
I have already run Daq Confijuration Utility and the "Test hardware" option inside Dasylab. The result in both is "Sampling Rate: 200000samples/sec".
In order to eliminate possible reasons of the malfunction I dramatically simplified my layer. Last time I tested it, it had only an A/D module directly connected to Digital Meter Module. The only parameter I was changing was Sampling Rate (Buffer size, block size --> Auto). At 5Hz all fine. After that, the higher the Sampling Rate the faster the error message pops up.
I haven't contacted MCC so far.
I am using 7 channels.
Thanks for the response so far