The users guide is showing the old picture. I will update the users guide with the new picture.

You insert inputs/outputs to FMU block before adding it to new model. Normally you don't need to create inputs/outputs by hand, they will be generated automatically based on the inputs/outputs of your FMU.

Adeel.

Thank you Adeel for your fast response. When will you upload the new version? If it's going to take some time, could you send me that picture please?

Regarding the second question, for example, if I want to connect a resistance to a FMU block as an input and a motor as an output (as in the picture attached), how can I create the ports of input/output in the FMU block in order to connect them? I haven't been able to find how to do it.



Sorry for my ignorance and thank you for your time.

Hugo

Hi,

I finally find out how to put I/O in a FMU block. But now, when trying to save after having modified something in the generated FMU of the 'BouncingBall' model, an error turns up:

[:0:0-0:0] Error: Failed to insert class fmi1CompletedIntegratorStep within BouncingBall_me_FMU.fmi1Functions;

 the available classes were:

  Modelica.SIunits.ComplexPower

  Modelica.SIunits.ComplexAdmittance

  Modelica.SIunits.ComplexImpedance

  Modelica.SIunits.ComplexReluctance

  Modelica.SIunits.ComplexMagneticFlux

  Modelica.SIunits.ComplexMagneticFluxDensity

  Modelica.SIunits.ComplexMagnetomotiveForce

  Modelica.SIunits.ComplexMagneticPotentialDifference

  Modelica.SIunits.ComplexMagneticPotential

  Modeli... 

And the same error with all classes: fmi1nextEventTime, fmi1EventUpdate, fmi1setString, fmi1GetString...

So I put everything as it was at the beginning but I got the same error. How can I fix it? Is it because I can't touch the code once the FMU is generated?

Thank you in advance.

Best,

Hugo

There is a bug saving protected classes. In your code find text "package fmi1Functions" and above this line add "public" keyword then try to save the file.
I will try to fix the bug.

You should not change the generated FMU code. When you are creating the FMU at that time specify the I/Os. If your FMU has the I/Os then the generated code will automatically have the I/Os. Even if you manage to put I/O manually in the FMU block still maybe your model will not work correctly.

Adeel.

Thank you Adeel! I added "public" but I got the same error, but anyways I have seen that, as you said, I should not change the generated FMU code. So if I need to change something, I will create a new FMU.

Now, I tried to use the FMU block of the bouncingball from the FMU SDK in a new model and I got an error when trying to simulate:

[:0:0-0:0] Error: Failed to open simulation result C:/OpenModelica1.9.1Beta2/share/doc/omc/testmodels/Test_res.mat: Too few rows in data_2 matrix

Also, in the Simulation Output window it says:

Process crashed

Simulation process exited with code -1073741819

Why does it happen? Is it because FMU SDK has something different in their FMUs that OM does not support?

I'm trying with this FMU SDK example because in my project I will have C code from Matlab/Simulink and in order to convert it to FMU I will use FMU SDK. Or is there another way to generate an FMU from C code?

Again, thank you so much.

Hugo

Send me the FMU and I will see what is wrong. The bouncingBall FMU from FMU SDK should work. It is very simple example.

Adeel.

Thank you Adeel. This is it.

bouncingBall.fmu

(The FMU SDK version is 2.0.3 and the bouncingBall.fmu is from "fmusdk\fmu10\fmu\cs\x64")

Hugo

Ah you are talking about co-simulation FMU. We don't support import of co-simulation FMU even the users guide mention this "The support for FMI Co-Simulation 1.0 tool coupling is still under development."

Adeel.

Oh ok. I thought you have it as a beta version.

Do you know any other open tool like OM that supports import/export FMUs for co-simulation, apart from FMU SDK?

Thank you.

Hugo

Try JModelica http://www.jmodelica.org/

Adeel.

Thank you Adeel! And thank you for all your fast and useful responses! I'm going to try with JModelica.

Best regards,

Hugo

In my project also I have a C code and, to convert it to FMU, I would use the SDK FMU but I do not know how to use it, if you can explain how to convert this C code into FMU. Or is there another way to generate a UMF from code C?
Thank you
Mary

I'm very new into OpenModelica, so sorry if this is a very basic issue but I'm a bit lost.


^Goldenslot^