I need to write a simulink s-function that is triggered by an input signal

Question

I wish to write data to a file when an integrator saturates. I would like to route the integrator's saturation output port to one of the s-function's inputs. I realize that I can continuously poll the signal, but I'd like to explore triggering on the signal. In other words, for the s-function to behave similarly to a software interrupt.

Answer 1

Madison,

If you like to call s-function based on trigger, you might explore using a relational operator to check the condition. When the condition is True, function would be triggered.

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Answer 2

F. Madison,

If you like to trigger it on signal change from 0 to 1, you can make use of a condition made up of relational operator and Unit delay:

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