How to know which block connected with outport block in a subsystem?

DevanujDeka - 2021-09-11T13:09:00+00:00

Question: How to know which block connected with outport block in a subsystem?

Hi all, I have outport block in a subsystem. In outside subsystem, there is block connect with this outport block. I want to get property of that outside block by command line. Do any know?

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Expert Answer

Kshitij Singh answered . 2025-12-15

Yes, you can get the properties of the block connected outside the subsystem to a specific Outport block using MATLAB commands (via get_param and related functions).

Recommended Approach (Using the Subsystem Block)

This is often the easiest, especially if the Outport is directly connected outside without branching.

1. Get the line handles from the subsystem block (replace 'myModel/mySubsystem' with your subsystem path):

   matlab

    

   lineHandles = get_param('myModel/mySubsystem', 'LineHandles');

    

    

2. Get the destination block handles from the Outport lines:

   matlab

    

   dstHandles = get_param(lineHandles.Outport, 'DstBlockHandle');

    

    

3. Convert to full block paths (handles are in a cell array if multiple Outports):

   matlab

    

   outsideBlockPaths = getfullname(dstHandles);

    

    
   • If there's only one Outport and one direct connection, outsideBlockPaths will be a string (e.g., 'myModel/SomeBlock').
   • If branched (one Outport line splits to multiple blocks), it will be a cell array of paths.

4. Get any property of the outside block(s), e.g., block type:

   matlab

    

   blockType = get_param(outsideBlockPaths{1}, 'BlockType');  % For the first one

    

    

   Or all parameters:

   matlab

    

   params = get_param(outsideBlockPaths{1}, 'ObjectParameters');

    

    

Alternative Approach (Starting from the Outport Block Inside the Subsystem)

If you know the specific Outport block path (e.g., 'myModel/mySubsystem/Out1'):

1. Get port handles:
   matlab

    

   portHandles = get_param('myModel/mySubsystem/Out1', 'PortHandles');

    

    
2. Get the line handle from the Outport:
   matlab

    

   lineHandle = get_param(portHandles.Outport(1), 'Line');  % Usually one Outport

    

    
3. Get destination block handle(s):
   matlab

    

   dstHandles = get_param(lineHandle, 'DstBlockHandle');

    

    
4. Then proceed as above with getfullname(dstHandles) and get_param.

This works even if the line branches outside the subsystem.

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