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SIMATIC Technology: S7 series 1200 Process control loop Exit

Hi,
I`m using PID controller in my S7-1200 but I found one issue.
When actual value on input reach setpoint as see on the picture, output value not goes to zero but is "frozzen" on last know value. 
As You see on the picture, setpoint and input are 35.0 but output is still -84 (I`m using double side control for linear motor).
Any idea what`s wrong?

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