Current sum of a variable in S-Function Builder

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MAGDALINI
MAGDALINI 2023-7-18
回答： Hua Bai 2023-10-19
Hello!
I want to calculate the current value of a variable which increases and decreases depending on some conditions. I am using the S-Function Builder, but I want to initialise this variable only at the beginning of the simulation (only once and NOT every time the C-Script runs). How can I do that?
Thank you in advance!

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回答（2 个）

Diya Tulshan
Diya Tulshan 2023-7-18
编辑：Diya Tulshan 2023-7-18
Hii Magdalini,
I understand that you want to initialise the value only once and to be precise in the beginning in the stimulation.
I have attached a new links for reference which will help to achieve the result:-
S-FunctionBuilder:- https://in.mathworks.com/help/simulink/slref/sfunctionbuilder.html
mdlInitializeSizes:- https://in.mathworks.com/help/simulink/sfg/mdlinitializesizes.html
Hope this helps!
Hua Bai
Hua Bai 2023-10-19
Maybe you can try to use the discrete state with initial condiciton, and update the discrete state in update method.

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