Continuous read from an encoder

[1984]

Hi,

I have started to use one of the NI examples to acquire samples from a angular encoder. To do this I use an NI 9401 in an NI 9188XT chassis. The plan is to read the samples continuously, but I am facing some difficulties, as it seems I can't configure the sample clock VI properly as my read VI times out without reading any samples. I know for sure that my encoder works and I also know that the wiring is correct as if I remove the sample clock VI then I can read the encoder. But then my acquisition becomes software timed which wont work for me as later I need to sync my encoder readings with AI channels.

This is the VI I wrote:

I have found an example to sync analog and counter readings (http://forums.ni.com/ni/attachments/ni/170/278826/1/SyncEncoderwithAI.JPG) but if I do the same my VI drops an error message like:   

Specified property is not supported by the device or is not applicable to the task.

Property: Start.DigEdge.Src

Please help me out with your thoughts.

thanks.

[Frankay]

Hi 1984,

Here is a community example that I found that might be of some help: https://decibel.ni.com/content/docs/DOC-10785

If it's not could you post the full error message and the function where this is occuring?

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Aaron F.

Applications Engineering