Hi,

I wanted to recreate the DCMotor model available in OMNotebook with one small change. I want to make the ground model similar to the Multibody.World model. i.e. it should be enough only if i drag and drop a ground component into the view. No need of connecting it.

For this, I made the ground component as an inner model by changing it in the annotation. 

model Ground

  Interfaces.Pin_a p ;

equation

  p.v = 0;

  annotation(defaultComponentName = "ground", defaultComponentPrefixes = "inner");

end Ground;

Then I gave a reference to this ground model in the voltage, emf, resistor and inductor components by

outer Ground ground;

But when i try to simulate the model, I get an error stating that Circular Equalities are detected. (This error comes in the normal DCMotor model when there is no ground component present.)


Can someone please tell me where I went wrong?

Regards,
Sanjay