Scaling on cRIO and C-Serie card

[TintinC]

Hello,

I'm trying to configure the scale of a measurement channel on a NI-9203 board installed on a cRIO-9056.

My input is a PT100 probe wired in 4-20 mA.

I'm configuring my board via Shared Variable Propertie, on the desired measurement channel.

And I get the following error (I admit it sounds counter-intuitive...): 

However, I put the data in the right place and in the "right way". 0.02 A is well > 0.004 A ....

I can put 20 (instead of 0.02) and 4 (instead of 0.004), but of course, the value returned by the board is in A and not in mA. So it doesn't match.

Does anyone have an idea of my error?

Thanks in advance!

[jwright30]

Hi,

Is there a reason you are using commas instead of periods for the scaling? That may be the issue.

-Jonathan

[altenbach]

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@jwright30 wrote:

Is there a reason you are using commas instead of periods for the scaling? That may be the issue.

---

The formatting of numeric is location specific and some countries use comma as decimal delimiter. This is a cosmetic issue, not related to the problem. (these are not string controls where anything goes 😄 ).

[TintinC]

Indeed, commas work perfectly!
I did try it with dots, though, and it replaced them with commas.

Do you have any idea what could be causing this error?

[jwright30]

Can you add your project file? I tried the same steps and did not get an error:

[altenbach]

Wild guess: Under the hood everything is of course just bits from the digitizer and at one point behind the scenes your values are mapped to a raw integer. Maybe some wrapping can happen in edge cases.

[TintinC]

Hello jwright30 and altenbach,

Here is the Project attached.

Indeed, when I look at the control panel of the card I see that you always several zeros after your numbers. I don't have anything.

altenbach, to be honest I didn't quite understand your comment... ^^

Thanks

[TintinC]

I've created a new project with a cRIO-9056 and a 9203 board, and I'm getting the same error: I can't set the right values (0.02 and 0.004).

[jwright30]

Hi,

Did you figure this out? I wasn't able to open the project since I use Labview 2020 and the project is in a newer version. You'll have to save it for a later version for me to open it.

-Jonathan

[TintinC]

Hello,

I still haven't found the solution. I've tried scaling manually in the code (only 2 measurements to adjust, so it's fine ...). But I'm still struggling to find it, knowing that I'm starting a new project today and the error is still there ... 🙁

You'll find the project in labview 2020 attached.

Thank you very much ...