DAQmx Timing property specified requires per device configuration

[HoNeu]

Hello!

I`ve tried to set the AIConvertRate in DAQmx Task with multiple devices. Following exception is thrown:

"An exception of type 'NationalInstruments.DAQmx.DaqException' occurred:
DAQmx Timing property specified requires per device configuration.
Explicitly specify the device(s) to which this property should apply.

Property: NationalInstruments.DAQmx.Timing.AIConvertRate"


But how could I set this rate for each device? There is no property to set this at the Device class.

Thanks in advance!

Holger

[MisterMou]

Hi HoNeu,

can you please upload your code?
Please simplify it for the issue. So it is easier for me to help you.

Regards
Robert

[HoNeu]

Hi,

sorry for the late reply!

I just try to set the AIConvertRate property like this:

analogInputTask.Timing.AIConvertRate = ...;

then the Exception is thrown.

No matter of how many channels or devices are configured in the task before.

Regards

Holger

[HoNeu]

I`ve also tried the "Set Convert Clock.vi" example from this page http://digital.ni.com/public.nsf/websearch/42484E84DA98053686256D32006E0494?opendocument&Submitted&&...

with LabView. Same result, "DAQmx Timing property specified requires per device configuration...." Is it possible to set the convert clock rate in DAQmx or not? Regards Holger

[John_P1]

What device(s) are you using?

Best Regards,

[HoNeu]

For this test I used a NI 9205 DSub device.

Regards

Holger

[John_P1]

You'll need to specify the module as the active device for the DAQmx Timing Property.  For example:

A cDAQ AI task contains references to both the chassis and the module(s), so even with one module in the task you'll need to specify when setting module-specific properties such as convert rate.

Best Regards,

[HoNeu]

Thanks, that works!

But I work with C# and .NET and need to set this property.

There is no possibility to specify an active device in the Timing class.

Any idea?

Best regards

Holger 

[John_P1]

There must be a way...

Unfortunately though I don't have the DAQmx .NET API or documentation installed--I'm not sure offhand what the call is going to look like in C#.

Best Regards,