Convert U16 to scaled data

Hello,
I'm using DAQmx Read (Analog 2D U16 NChan NSamp) to read from USB 6009. However, i need to scale the voltage values and calculate the RMS values on each interation.
I must write it in I16. I've tried a lot of things but none worked!
Thanks
Attachments:
imagem.JPG ‏49 KB

You have a few problems, mostly stemming from not understanding some diagram structures:
You are passing the 2D array of integers into a for-loop that is wired to loop once. That's not much of a loop, now, is it?
Within the loop you're peeling off column zero (since the loop is only running once), and then multiplying the values by some constant. Not sure what that constant is, since its value is in case 0 of the case structure, which you don't show.
You're then creating a 2D array of this (not sure why), which you're feeding into a subVI that seems to have been written by you. Without seeing what this VI is doing, it's impossible to say if it's doing it right.
Given that, the question I have is: how many channels are you scanning? If I remember correctly, the DAQMX VI that you're usint spits out a 2D array of integers, with each column being a different channel. Are you scanning just one channel, and so only need one column? If so, you don't need a for-loop to get your samples. Just use an Index array to pull off the channel you need. If you're scanning multiple channels, you don't need a for loop at all. Just feed the 2D array into a multiply function. It's polymorphic:
Message Edited by smercurio_fc on 05-04-2007 09:05 AM
Attachments:
Example_BD.png ‏6 KB

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