PI BLOCK IN SIMULINK

I have a model in simulink with a PI controller and a transfer function which is shown below.

The PI controller is 3.15(1+2.6s/2.6s) which I have put in ideal form where the proportional(P) is 3.15 and the integral(I) is 2.6 however Im not getting the correct trace on the scope

However when I replace the PI controller with this input output block I have shown below I get the correct answer. Can someone explain what I am doing wrong with the PI block, thanks.

This is what's inside the subsystem input output block.

Answer 1

[Animesh]

Hi @Uzair Akhtar,

If you look at “PI controller” block’s dialog box, you can see that compensator formula is:

Given the value of “P = 3.15” and “I = 2.6” would generate the compensator as:

But the desired compensator is:

To obtain the above result use, “P = 3.15” and “I = 3.15/2.6”.

Here is an image with correct configurations:

You can refer to the following MathWorks documentation for more information on "PI Controller" block:

https://www.mathworks.com/help/simulink/slref/pidcontroller.html