S-Function - Can't assign Matlab functions defined on path (Level 1 vs Level 2)

[SpaceShawn]

1. How to create level-2 S-Functions
2. How to change input/output parameters
3. What are Demux and Terminator

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1 - How to create level-2 S-Functions

When Matlab Functions are copied from a model into a library, they are conveniently converted to Level 2 S-Functions. However, assigning the S-Functions to the Matlab functions defined on the path does not work.

See sfunction_test.slx for an example

The specified MATLAB File 'thrust_hack' in 'thrust_curve_test/THRUST/ SFunction ' is not a valid Level 1 S-Function. The number of input and/or output arguments is not valid. A likely cause for this error is that the name of a level-2 MATLAB S-function has been specified in this block (which supports only level-1 MATLAB S-functions). Use the 'Level-2 MATLAB S-Function' block from the Simulink library

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2 - How to change input/output parameters

• S-Function inports/outports are created when the Matlab Function blocks were copied to the library. How to assign additional inports to the S-Function?
• Will linking a valid Level 2 Matlab Function dynamically change in the inports/outports?

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3 - What are Demux and Terminator?

[SpaceShawn]

Interpreted Matlab Functions were found to be suitable with some additional blocks to mux and demux the inputs and outputs, respectively