Programmatically control input/output visibility checkboxes for FMU block in Simulink through script

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Ruchit
Ruchit 2025-10-16
回答： Tridib 2025-10-29
Hi everyone,
When I import an FMU into Simulink, I can see all the inputs and outputs listed inside the FMU block parameters dialog. Each signal has a visibility checkbox that can be manually checked or unchecked to show or hide the corresponding port on the block.
I would like to automate this process — instead of manually checking/unchecking the visibility boxes, I want to control them through a MATLAB script.
Is there a way to programmatically set the visibility of these FMU input/output ports in Simulink? For example, using a command like set_param or by accessing parameters of the FMU block?
Thank you.

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Tridib
Tridib 2025-10-29
Hi @Ruchit,
To change a dialog parameter value programmatically, you can first use the "get_param" function to find out the exact parameter names for the block. This will show you all the dialog parameters that can be modified using "get_param" and "set_param". If you find parameters related to port visibility, you can try changing their values between 'on' and 'off' with "set_param".
For more details, you may find these related MATLAB Answers helpful:
https://www.mathworks.com/matlabcentral/answers/1967459-i-have-to-change-function-visibility-of-simulink-function-block-using-m-script?s_tid=answers_rc1-2_p2_MLT
https://www.mathworks.com/matlabcentral/answers/2138202-how-to-make-the-ports-and-internal-variables-of-a-fmu-block-visible-or-invisible
Hope this helps!

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