I have created a Simulink project with a subsystem containing a Double-Acting Actuator. The subsystem is set up with a mask where a parameter is added to the dialog, and the 'Tunable' attribute is set to 'on'. The parameter used on the mask is defined as a workspace variable.
Searching the generated c/c++ (non-reusable) code, there is no references found to the parameter used e.g. for initial piston position, but the value (0.54321) of the parameter is found several places, indicating that the parameter has been inlined (hardcoded) and not possible to change after compilation.
Parameters used outside of SimScape, with simulink blocks, like a rate-limiter, is visible in the code used as a variable - which means it is tunable (during initialization or runtime).
Thanks