Script Parse and NamedValueGet DAC

Hello

I m having still some problems with the method parse and NamedValueGet. Because the documentation isn´t exactly I have a few questions for the following lines:

* GetScan

a = ouDim.Read (146,0)

ParseRes = ouDim.Parse (a, Parsedef)

Is it true that ParseRes must be an array if the parser was able to interpret the analysis? What happens if the parser failed? What is read and what happens if there is no send data?

* ReadChannel

DataP = ouDim.NamedValueGet (...)

Is it possible that the NamedValueGet method will block if the parser could not interpret the data? I have to catch this error somehow, or is it possible to initialize channels so this works even if the parser failed?

Thank you very much

diademi

Hello diademi,

You can assign the NoValue to a variable, but it will be treated as NULL. So I don't know if this will help you a lot.

Be careful when you assign data to the variable DataP (the return value of the function). Internally, the driver checks to see if this value is empty. If this is not the case, the pilot assumed that the function is complete and returns the current value of that variable. So to put a value on DataP should always be the last thing you do in the SFD_ReadChannel(). Otherwise, you might get incorrect results or unexpected side effects (expecially in asynchronous mode).

Rainer

Tags: NI Software

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