Error -200077 Requested value is not a supported value for this property., using DAQmx Create Scale.vi

[chipet]

  Hello,

  I`m using an NI USB-6251 device and LabView 2009, 32 bit, and I want to know if it is compatible with the DAQmx Create Scale.vi block.

Why I`ve used it?

  I`m reading some voltages from a potentiometer in the range 0.001V and 5.05V and I want to scale them into 0.05 and 0.99 range.

  I`ve attached the DAQmx Create Scale.vi to the virtual channel block and made all the settings like: choosing "From Custom Scale" for Unit parameter in the virtual channel block,  choosing Map Ranges mode for the DAQmx Create Scale and defining the min and max values for prescalde and scaled ranges.

 Although when I`m trying to run the application at the DAQmx Start task appears an error saying:

     Error -200077 Requested value is not a supported value for this property.

the connections are made as in the link.

   Any suggestion is welcomed.

   Thanks,

      chipet

[Norbert_B]

chipet,

please verify that the error only occurs once you connect your custom scale. Error -200077 can have quite some different sources as well...

Another thing you might have to check is the min and max you are passing when creating the virtual channel. If you use a custom scale, remember that min and max have to be your scaled values!

Example:

0V => 0 Degrees Celsius

1V => 1000 Degrees Celsius

==> Your min/max have to be Degree Celsius, e.g. 0..500, which will configure the hardware for 0..0.5V input range.

Norbert 

[chipet]

   Norbert,

  thanks for your answer. In the attached photo you can see how I put the values.

  chipet

[Freelance_LV]

Hi

As indicated earlier, you have not wired anything to the min and max value on the AI Voltage function. Ensure that these inputs are not default but, are set to match the scaled equivalents.

Also, when you get the error '-200077', what is the complete error message? the error message will tell you which value are incorrect, the expected values and the entered values.

post the vi, if possible, and a screen shot of the error display.