MATLAB: Change the position of a part of the input ports of a simulink block.

port connectivityport positionsimulink block

Hello everyone,

I would like to change the position of the input ports of a simulink block. I need to put them on the bottom of a subsystem block. Does anyone have any ideas for how I can put the input ports on more than one side?

Actually I tried to modify the parameter "port connectivity", but at any attempt I get an error message saying:

*' ModelReference block parameter 'PortConnectivity' is read-only '*

This is the list of instructions that I used "

portData = get_param('ModelName/MySubsystemBlockName','PortConnectivity'); 
portData(1).Position = [newXValue newYValue]; 
      set_param('ModelName/MySubsystemBlockName','PortConnectivity',portData); "

I'm wondering why we have that option, "PortConnectivity", in the parameters list of a Simulink block: http://www.mathworks.nl/help/toolbox/simulink/slref/f23-7517.html if we cannot use it, and in particular in which cases we have a Simulink block where this option is write permitted?

Any help?

thanks in advance

Best Answer

AFAIK, it is currently not possible to change the positions of input/output ports on a Simulink block. The best you can do it Rotate/Flip your block, but the relative positions of the ports will be unchanged.

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MATLAB: Is the subsytem block flipped after creation of that subsystem block in Simscape 2.1 (R2008a)

This change has been incorporated into the documentation in Release 2010a (R2010a). For previous releases, read below for any additional information:

This is the default behavior in Simscape 2.1 (R2008a). The Connection Port block's orientation (set in the dialog) is relative to the subsystem orientation, not the model window orientation.

As a workaround, the Simulink input ports can be made to be on the left side and the physical ports on the right side of the subsytem by performing the following steps:

1) Flip the block (Right-click->Format->Flip Block).

2) Set the physical ports to the right (double-click->Port location on parent subsytem (Right)).

MATLAB: How to get the x,y coordinates of port handles on a susbsytem block

Well, I answered my own question...PortConnectivity is the parameter I was looking for. Here is some code that will "clean up" the input and output ports for a subsystem like that above (assuming input and output port blocks are connected to the subsystem block). Make sure you select the subsystem to clean-up first!

% get the subsystem port handle positions
pc = get_param(gcb,'PortConnectivity');
% distance from the subsystem to the port
offset = 200;
for i = 1:numel(pc)
      % position of port connector
      y = pc(i).Position(2);
      x = pc(i).Position(1);
      % port block handle and size
      if isempty(pc(i).SrcBlock)
          ph = pc(i).DstBlock;
          off = -(offset-50); % asthetics here...related to the width of the port block
      else
          ph = pc(i).SrcBlock;
          off = offset;
      end
      % port block dimmensions
      pp = get_param(ph,'Position');
      w = pp(3)-pp(1);
      h = pp(4)-pp(2);
      % adjust position of port block
      set_param(ph,'Position',[x-off,y-h/2,x-off+w,y+h-h/2]);
  end

Best Answer

Related Solutions

MATLAB: Is the subsytem block flipped after creation of that subsystem block in Simscape 2.1 (R2008a)

MATLAB: How to get the x,y coordinates of port handles on a susbsytem block

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