Anti Windup

Hello,

I think, you are using S7-1200 Controller to do PID control...

The "anti wind-up" functionality is working like it is written in the function manual of TCON_CP. You will find the manual using the following link...

• PID control function Manual (12/2017) of S7-1200 and S7-1500
  https://support.industry.siemens.com/cs/ww/en/view/108210036
  

...and you will find the Information in chapter 7.3.2.2. of the "integral Action" description of the controlling algorithm:

With a limitation of the manipulated value, the integral action is stopped. With a control deviation that moves the integral action in the direction of an internal setting range, the integral action is released again.

Sorry for that confusion.