Multi(---) connection issue

[jianjunhu@…]

In OpenModelica,

1. it allows to make the connection between two vectorized connectors even when the parameter that is used for specifying the connector size has not been declared. For example in below case, I can still make the connection even when the nZon has not been declared.

   Buildings.Controls.OBC.CDL.Continuous.Sources.Constant con1[nZon](k = 1) 
     annotation(Placement(visible = true, transformation(extent = {{-60, -60}, {-40, -40}}, rotation = 0)));
   
   Buildings.Controls.OBC.CDL.Continuous.MultiMax multiMax1(nin=nZon) 
     annotation(Placement(visible = true, transformation(extent = {{-12, -60}, {8, -40}}, rotation = 0)));
   
   equation
     connect(con1.y, multiMax1.u) 
       annotation(Line(points = {{-38, -50}, {-14, -50}, {-14, -50}, {-14, -50}}, color = {0, 0, 127}, thickness = 0.5));
   

2. it allows to make the connection between two vectorized connectors which have different size. The auto-generated connection statement does not specify the element-to-element connection between the two connector. For example in below case, output connector vector of con1 has size 2 and input connector vector of multiMax1 has size 3, the connection is still allowed.

   Buildings.Controls.OBC.CDL.Continuous.Sources.Constant con1[2](k = 1) 
     annotation(Placement(visible = true, transformation(extent = {{-60, -60}, {-40, -40}}, rotation = 0)));
   
   Buildings.Controls.OBC.CDL.Continuous.MultiMax multiMax1(nin=3) 
     annotation(Placement(visible = true, transformation(extent = {{-12, -60}, {8, -40}}, rotation = 0)));
   
   equation
     connect(con1.y, multiMax1.u) 
       annotation(Line(points = {{-38, -50}, {-14, -50}, {-14, -50}, {-14, -50}}, color = {0, 0, 127}, thickness = 0.5));
   

[Francesco Casella]

Determining the connector size in general could be difficult, or impossible. For example, you may connect two components in a certain model M, and then instantiate that model within a cointainer model that actually gives values to the array sizes.

What would be your requirement, exactly?

[anonymous]

Replying to casella:

Determining the connector size in general could be difficult, or impossible. For example, you may connect two components in a certain model M, and then instantiate that model within a cointainer model that actually gives values to the array sizes.

What would be your requirement, exactly?

Ideally, I would expect that OpenModelica would allow to make the connection only when feed-in connector vector and the receiving connector vector have the same size that is specified by a declared parameter (may or may not assign value).

Also, the receiving connector vector would expand if there is another feed-in connector.

[Francesco Casella]

Adeel, after working on #5628 would you have any ideas about this?