FPGA not writing voltages correctly

[atokad]

I am using a cRIO 9035 with modulus NI 9264, 9205, 9213, 9401, 9344 x2.

Here is what my FPGA code looks like:As you can see the "Tube_Air_MFC" is wired to AO2 and the "MFC_Tube_Air" is wired from the AI2. I attached the current project that I am working in, if you run the initialized values you will see that the Air Set value will read  ~14.37 which will correspond to the flow rate of the tube air. 

It should be outputting 14.37/15 = 0.958V, instead though my multimeter is giving me a reading of 0.331V. Since my analog output is wrong then the analog input is wrong too, so the actual air value is completely off. 

Sticking with the same analog device, I am using a SmartTrak CL100 mass flow controller at the AO2 position. It has a voltage reading of 0-5V and a flow rate of 0-75 SCCM, hence the voltage conversion of dividing/multiplying by 15. The NI-9205 terminal is set to +/-5V with a differential terminal.

Here is what the wiring looks like

I kept getting phantom voltage readings from the NI 9205 so I just grounded all the terminals that were not being used.

[atokad]

Anybody have any clue? I tried setting a larger wait time, but that didn't seem to do anything

[Ben]

What does the output rad with just a meter connected and no load connected?

Ben

[atokad]

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@Ben wrote:

What does the output rad with just a meter connected and no load connected?

Ben

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If there isn't any voltage being sent then the readings are small decimals (i.e. below +/- 0.25)

[Ben]

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@atokad wrote:

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@Ben wrote:

What does the output rad with just a meter connected and no load connected?

...

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when;

"

It should be outputting 14.37/15 = 0.958V,

"

Ben

[atokad]

It was ouputting 0.331V whenever the calculation should've been 0.958V.

Now since I changed the wait time, it looks like there is actually 0 voltage output.

[Ben]

I am headed home in 14 minutes...

If you do what I asked before then I may be able to help further but after that you willhave to forget about me being able to help.

Run the code again "whenever the calculation should've been 0.958V. " do not mess with anything else except pulling wire off of the terminal block.

12  minutes now.

Ben

[atokad]

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@Ben wrote:

Run the code again "whenever the calculation should've been 0.958V. " do not mess with anything else except pulling wire off of the terminal block.

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Which wire on the terminal block? Are you referring to the module or the code??

[Ben]

the physical wire get disconnected and attach a meter where the wire was connected.

There could be an issue with the load you are driving...

Ben

[atokad]

That gives me a voltage reading of .290V