Why does an if block only run once?

I have an issue in Simulink where I have to condition an output signal which currently is a striaght line, but should reset to zero when it hits a multiple of 360 degrees. This has been done by taking the input and subtracting 360 if true, else it's a straight-through. I've already tried an if-else block and action subsystems, however that seems to only execute once (i.e. when the output reaches 360 for the first time, after that it continues past 360 until the simulation times out).

Any ideas?

Answer 1

[Steven Lord]

I think you want to use a Math Function block to compute the mod of your input.

[Jon Emonson]

That's a winner. Thanks for the hint, a nice simple solution.

Answer 2

[Terek Li]

'if' statement is not a loop, if you want to look it then use 'while'

Answer 3

[Jon Emonson]

Well, any suggestions how to use a while loop to condition the input signal such that every n*360 to subtract n*360?