Why is my variable not staying updated in Simulink
15 次查看(过去 30 天)
显示 更早的评论
Hello,
I am using Simulink and have a variable set to zero in an enabled subsystem. I send the signal out of the subsystem and am trying to update it as x = x + 1 where x is the signal. After simulink goes through all the blocks once and gets back to where x = x + 1 the x is reset to 0. I have a breakpoint in the enabled subsystem where I initialized it and it never goes back there. Any ideas would be appreciated. Thank you!
2 个评论
Kaustubha Govind
2013-6-18
Could you please explain what block(s) you use to implement the x=x+1 part?
采纳的回答
更多回答(1 个)
Erwin Torreao Dassen
2013-6-18
编辑:Erwin Torreao Dassen
2013-6-18
Is this a custom matlab function block? In that case try declaring the variable persistent. (UPDATED)
3 个评论
Erwin Torreao Dassen
2013-6-19
I'm not sure I understand what you trying to achieve. My guess of what is happening is that your matlab-function block that defines x = 0 is being used as input outside the subsystem. If that is the case the first block outside this subsytem will always receive 0 as input signal and it will never output more than 1... In fact, your matlab-function block is just a "constant" block.
What is the behavior you want to obtain?
Regards, Erwin
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Event Functions 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!