Change number of connection ports of a mask depending on user input?

I have the following problem in Simulink: I want to change the number of port connections depending on the user input. If the user for example writes the following Parameters into the User Input,

then the block should look like this:

I want to use the block inside a library, so i think it should be written in the callback of the mask, but up to now i haven't found a solution for this.

Answer 1

[Govind KM]

Hi Bernhard,

As I understand, you want to change the number of input/output port connections based on user input.

• This can be achieved using Dynamic Masked Subsystems, which are masked library blocks that can modify their structural contents. You can find more information about them in the documentation : https://www.mathworks.com/help/releases/R2023b/simulink/ug/create-dynamic-masked-subsystems.html
• You can refer to this article to achieve this specifically for masked subsystems containing S-Functions: https://www.mathworks.com/matlabcentral/answers/97278-can-my-s-function-have-variable-number-of-inputs-and-outputs

Hope this helps!