Setting voltage sensitivity on NI 6581

Hello,
I've got the following system:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/206651
The specification says:
Selectable voltages of 1.8, 2.5, and 3.3 V or external reference voltage (1.8 to 5.5
How do I select these voltages? The manuel uses somekind of read write control with an unnamed reference. I cannot find this reference. Is the a possibility to set this on the FPGA's vi?
Greeting
Matthias

hello,
I don't really know that device, but I have ever used some RIO devices, so I can try helping you.
The manuel you are talking about shows this image :
This is a "Read/Write Control" node which can be found in the "FPGA Interface" palette. This palette is available when you edit the diagram of the RT code (I said : "RT code"...not "FPGA code").
The reference you mentioned in your message is a FPGA VI reference : you can get this reference by using "Open FPGA VI Reference" function, in the same palette ("FPGA Interface", available from RT code diagram).
Those tools allow you to control the execution of your FPGA VI from the RT part of your code : you can set control values (controls placed on the FPGA VI front-panel), run this FPGA VI, retrieve data from DMA FIFO, etc...
So, from this little screenshot, we can assume that the developer put 2 commands on the FPGA VI front-panel. The respective labels for these 2 controls are "Power Supply (Connector A)" and "Internal Power Supply Voltage".
Then, from RT code diagram, he opened a FPGA VI reference, and then changed the value of these 2 controls by using "Read/Write" Control node (before or after running the FPGA VI with an "Invoke Method" node, also available in the palette).
But...there's no screenshot showing how these 2 parameters are modified by FPGA. I guess that in the FPGA VI, an "FPGA I/O Property" node gives an access to power supply settings.
In the manual, it is said :
"Use the NI Example Finder to find several NI FlexRIO device power setting examples"...Beyond my explanations that probably sound a little bit compliicated, I think that it will be the best way to find an answer to your question ! ;-)
Julien

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Saridar wrote:
Hi all,
I am working with a NI 6221. I am wondering if it is possible to change voltage level of digital out channels? Currenty I am using "Digital Bool 1line 1 point" as my DAQmx write.
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Saridar
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Attachments:
Remove Element2.jpg ‏135 KB
Acquire Response1.jpg ‏266 KB
Remove Element1.jpg ‏135 KB

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