Get signal lines in a linked library in Simulink

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Prabhakar Vallury 2023-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/1901135-get-signal-lines-in-a-linked-library-in-simulink

编辑： Fangjun Jiang 2023-1-30

[Simulink version 2019b]

I have a Simulink model called 'main.slx' with several linked library blocks (all resolved). One of these ilinked libraries is called 'link1'. I need to get all the signal lines inside 'link1'

Scenario 1:

I open link1.slx directly in Simulink and click on it. I get all the signals using find_system(gcb, 'FindAll', 'on', 'type', 'line'). This works well.

Scenario 2:

I open main.slx in Simulink and click on the link1 block. This time the same find_system command returns empty. I go deeper into link1 and try again, but still no result.

Is there a direct way to achieve this result? Do I need to get the pathname for link1, open it locally and then run the find_system command? That would be very time-consuming. Hopefully there's a better/faster way? TIA.

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回答（1 个）

Fangjun Jiang 2023-1-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1901135-get-signal-lines-in-a-linked-library-in-simulink#answer_1156975

Not sure if "link1.slx" is a model/subsystem or a library, which results in a subsystem reference or a library link.

In any case, it sounds like you need to add one of these options

'FollowLinks','On'

'LookInsideSubsystemReference','On'

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Prabhakar Vallury 2023-1-30

That is correct but I was hoping to programmatically get all line handles directly by querying main.slx with find_system. That doesn't work, so I have to loop through all the linked library blocks that exist within main.slx and get the line handles for each one. In this, I have to ignore annotation blocks, etc. as well. Makes it a little more convoluted, but that's okay. Would've been nice to get all handles from the top-level query, that's all I'm saying.

Thanks for the guidance.

Fangjun Jiang 2023-1-30

编辑：Fangjun Jiang 2023-1-30

I don't understand the problem. I dragged a "PID Controller" library block (it is a masked block) to a new empty model "untitled" and ran below. It found 160 line handles. All are inside the library block.

lines=find_system('untitled','FindAll','On', 'FollowLinks','On','LookUnderMasks','All','type', 'line')

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