How to hold True value infinite

I have a variable that will be false, true, then false. I want to home onto the true value on a second variable until the end of the simulation. For example the window is clean, until I touch it. I have a Boolean variable if I’m touching the glass. But I want to capture the window and it’s now forever smudge.

[Arthur Roué]

Does this help ; https://blogs.mathworks.com/simulink/2014/08/06/how-do-you-hold-the-value-of-a-signal/ ?

[Rebecca Red]

I think that gets close, but I currently only have the one input. I’m not sure how to translate that to just hold the first Boolean switch to true.

Answer 1

[Fangjun Jiang]

Connect this signal to the "S" (set) of a S-R Flip-Flop block.