How can I increase a count in the while iterator block?

I am trying to run a whilte iterator block for the convergence of a variable, but this variable is not decreasing at all.

The goal is to reach at Display3 a value higher than 7.94 (Psep) and Display1 to show a value lesser than 31.

Could you help with this matter?

Thanks in advance.

[Mathieu NOE]

hello

1/ I assume that this part

is inside a while iterator subsystem While Iterator Subsystem - Repeat subsystem execution during simulation time step while logical expression is true - Simulink

2 / Psep seems to be a constant = 7.94, so I don't see how it could evolve ...

3/ there is nothing that increments (counter) in your code . The while iterator block output should eventually be used to drive a counter which output then must be fed at the same firts add block (neg input) . I would also recommend to convert the while block output from logicl to numerical if you use it afterwards to do numerical operations

all the best

[Walter Roberson]

The output of the comparison to zero is being fed into the Add block where it is being subtracted. At best that would result in subtracting 1 each iteration; at worst it would result in subtracting 0 each iteration.

[Carlos]

Hi, thanks for your time to analyse this problem.

1- You are right, it is inside a While iterator subsystem

2- You are right, Psep is a constant but it is only a value for comparison, the real thing is that I need that Fcn P be greater than Psep.

It comes from a larger system in which I already know for certain that Fcn P is lower than Psep. (the display block after the while iterator block is not the answer I am looking form).

That is why, inside the while iterator system, I am looking for lowering In1 by 1 each time the while iterator is running in order to have a Fcn P greater than Psep.

3- Again you are right. I am not really certain in the use of the while iterator block in order to control what I am planning to do. Could you tell me how I am supposed to do that? or give me a reference or example that I can use as a guide to do the job.

Thanks again.

[Carlos]

Hi, I appreciate your time to analyse this problem.

You are right. it comes from a larger system and I already know for certain that Fcn P is lower than Psep and I am looking for lowering In1 by 1 each time the iterator is running in order to have a Fcn P greater than Psep. When Fcn P becomes greater than Psep, I expect to finish the cycle.