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InitType in a PI block

#3820  Permalink Top

InitType in a PI block

Oct-25-13 09:26:06

I would like to set intitType=3 in a PI block.
I've written the following simple minimal model:

Code:

model PI

  Modelica.Blocks.Continuous.PI PI(initType = 3, x_start = 1);

  Modelica.Blocks.Sources.Constant const;

equation

  connect(PI.u,const.y);

end PI;

When I run this in OM r17838 I get the following error:

Translation    08:23:37    C:\OpenModelica1.9.1Nightly\lib\omlibrary\Modelica 3.2.1\Blocks\Continuous.mo    568:5-571:40    Type mismatch in binding initType = 3, expected subtype of enumeration(NoInit, SteadyState, InitialState, InitialOutput), got type Integer.

Can someone tell me how to solve this?

Thank you.

#3821  Permalink Top

Re: InitType in a PI block

Oct-25-13 09:29:02

There is no InitType=3. Use Modelica.Blocks.Types.Init.InitialState or Modelica.Blocks.Types.InitPID.InitialState depending on if you use a PI or PID block.

#3822  Permalink Top

Re: InitType in a PI block

Oct-25-13 11:24:34

Hi,

Modelica Specification is clear when it says that you cannot bind Integers to Enumerations.
Dymola supports it, but is not really conform to the Modelica Specification!
Use enumerations when you bind/compare enumerations and use Integer(Enumeration) when you want to convert enumerations to Integers.
See more here:
https://trac.openmodelica.org/OpenModel … tLibraries

Cheers,
Adrian Pop/

#3823  Permalink Top

Re: InitType in a PI block

Oct-25-13 12:20:27

Thanks a lot.
Massimo

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