CODEWITHSUNDEEP
modelicadymola
Clement44
Clement44

Reputation: 794

How to reset a parameter value when disabled?

I use a lot of parameter annotations when developping components, in order to make them user-friendly, especially the Dialog(enable=...). However, when a parameter is disabled, it just prevents the user from modifying it afterwards, but it does not affect the value that may have been set beforehand. Here's an example:

model toto

  parameter Boolean isComplexModel=true;
  parameter Boolean isDynamicModel=false annotation (Dialog(enable=isComplexModel));

equation 

  // Mass and energy balance equations
  if isDynamicModel and isComplexModel then
    [...]
  else
    [...]
  end if;
  
  // Other part of the code
  if isComplexModel then
    [...]
  end if;
  
end toto;

In this example, the dynamic equations are used only if isDynamicModel=true, which should be available only if isComplexModel=true. However, I could set isDynamicModel=true and then isComplexModel=false in the instance. That's why I need to specify if isDynamicModel and isComplexModel.

Therefore, is there a way to modify (or at least reset) the value of a parameter when it is disabled?

Upvotes: 0

Views: 72

Answers (1)

CSchulzeTLK
CSchulzeTLK

Reputation: 101

I don't think that it is possible to change the parameter value when it is disabled.

You have three cases (simple, complex with dynamics, complex without dynamics). As tbeu mentioned, a better design would be to implement this as an enumeration.

If you want to use booleans, you could also implement an additional protected parameter

  parameter Boolean isComplexModel = true;
protected
  parameter Boolean hasDynamicBalance = isDynamicModel and isComplexModel;
[...]
  // Mass and energy balance equations
  if hasDynamicBalance then
    [...]
  else
    [...]
  end if;

If you implement the simple/complex sub-models replaceable, you might implement the dynamics parameter inside the complex sub-model. However, interfacing the sub-model is more complex.

  model ComplexModel
  extends BaseModel;
    parameter Boolean isDynamicModel=false
    [...]
    // Mass and energy balance equations
    if hasDynamicBalance then
      [...]
    else
      [...]
    end if;
  end ComplexModel;

  model SimpleModel
  extends BaseModel;
    [...]
  end SimpleModel;

  replaceable SimpleModel model constrainedby BaseModel;
...

Upvotes: 2

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