How do I set the read timeout when using channelReader.ReadWaveform?

[cfiedler]

I am aquiring data using a USB-6210 A/D, and it works great until I try to take a waveform longer than 10s. 

When I take a waveform longer than that, I get error 200284, "Some or all of the samples requested have not yet been acquired.  To wait for the samples to become available use a longer read timeout..."

No problem, I thought, I'll just set a longer timeout.  I searched through the documentation, and the only timeout I found was the Watchdog timeout.  When I tried to set that to a longer value,  I get status code -200452 - specific property is not supported by the device or is not applicable to the task.

I am using the code from the AcqVoltageSamples_IntClk.2008 .net sample with C# in Visual Studio 2008, .net 3.5 sp1.

How do I set the timeout so that ReadWaveform() does not timeout?

Here is the code:

privateAnalogMultiChannelReaderchannelReader;

privateAnalogWaveform<double> awf;

publicList<double> GetWaveForm()

{

    try

    {

        Task getWaveform = newTask();

        getWaveform.AIChannels.CreateVoltageChannel(Channel,"", TerminalConfiguration,RangeMinimum,

                    RangeMaximum,AIVoltageUnits.Volts);

        getWaveform.Timing.ConfigureSampleClock("", SampleRate, SampleClockActiveEdge.Rising,

                    SampleQuantityMode.FiniteSamples, NumSamples);

        getWaveform.Control(TaskAction.Verify);

       channelReader = new AnalogMultiChannelReader(getWaveform.Stream);

       AnalogWaveform<double>[] data = channelReader.ReadWaveform(NumSamples);

       awf = data[0];

       samples = new List<double>();

       for(inti=0; i<NumSamples ; ++i) samples.Add( awf.Samples[i].Value );

       returnsamples;

    }

    catch( DaqExceptionexception)

    {

        MessageBox.Show( exception.Message);

     }

     List<double> l = newList<double>();

     return l;

}

Thanks,

Curt

[REDS · Accepted solution]

Hi Curt,

Here is a Knowledge Base that can help you set the Timeout parameter in your code:

Using the DAQmx Task Timeout Property in Visual Studio

[cfiedler]

Thanks!  That helps a lot!

Curt