USB 6008 .net example, digital change detection get error

[PaulMan]

Hi,

  I am using the USB 6008 with C#.net and I am trying to run the the ReadDigChan-ChangeDetect example but I get an exception that says:

Requested value is not a supported value of this property

Property: NI....SampleTimingType

Request:  ...ChangeDetection

Can Select ...OnDemand

Sample Code: -200077

  I haven't altered the code so I'm not sure why it wouldn't work.  Thanks

Paul

[Dennis_Knutson]

You get the not supported property error because change detection is not supported with the USB 6008. The digital I/O on the USB 6008 only has the on-demand timing mode. That means all digital I/O is software timed. If you need to detect the change of state of one of the inputs, you have to do it in software by doing a continous read and analyzing the results in your code.

[PaulMan]

Thanks for your response!