Problem with a change detection in a loop

[grega]

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@nathand wrote:

Try using just Clear Task with no Stop Task first.

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Hey nathand,

it is the same. Then the program waits for clear task.

Regards

[nathand]

My apologies for misleading you, then.  Try one more thing (I tested this one, and it works, at least with a simulated device): use "DAQmx Control Task" from the DAQmx Advanced Task Options palette and set the action to abort.

EDIT: Note that you will still want to clear (or at least stop) the task after aborting.  I am surprised that Clear Task didn't work since the help says that it aborts the task if necessary.

[grega]

Thanks that works perfectly.

Do you maybe know if it is possible for NI 9423 module to have two input bits as edge detection?

First I did it with 1 bit, now I tried with 2 bits and I get this error: NI Platform Services: The specified resource is reserved. The operation could not be completed as specified.

Does this mean, that I can do the edge detection only on one line?

Regards

[nathand]

It appears from this white paper that you can do change detection on multiple lines so long as they're all grouped into a single task.

[grega]

Hm, weird. ok thank you for your help.