Implementation of PID control loops with S7 1200
In closed-loop control systems, the output value of the control loop always changes according to the set value (desired value for output) and the current value of the process (current state measured by the transducer). In other words, in such a system, the current value of the process is sampled at any time and compared with the set value, and the existing error value is calculated and an output value is sent to the output to compensate for the system error.