Simulink fixed-step size protected variable name
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Augusto Dufloth on 12 May 2022
Is there any protected variable name for the Fixed-step size solver property pane that can be used in a block?
For instance, if I specify a number, let's say 0.001, I would like to use the variable name that points to the value in the configuration parameter. I know that a user specify a variable name and call it from workspace, but that is not practical in my model.
More Answers (1)
Walter Roberson on 18 May 2022
Edited: Walter Roberson on 18 May 2022
"Is there any protected variable name for the Fixed-step size solver property pane that can be used in a block?"
No, there is not.
Would using a Datastore be acceptable for your purposes? That is, use the datastore variable to configure the solver step size, and then the same value would be available for reading anywhere else.
I do not know what would happen if you were to change the variable value during execution, especially without using set_param.
You talk about MATLAB scripts in a way that suggests to me that you are thinking of having a MATLAB script that sets the value and then calls sim(). But as you are not being specific on the wording you are also ruling out using a MATLAB Function Block that uses get_param and lets the result be a signal.
Now that I think of it... You could perhaps create a Constant block with an InitFcn callback that used get_param to fetch the step size and set the constant value; then feed the constant to wherever needed. That would be self-contained.