This calculator determines PID controller parameters (Kp, Ki, Kd) using the Ziegler-Nichols method, compliant with IEC 61131-3 standards. It is used to optimize control loops in industrial automation systems.
The formulas are based on ultimate gain (Ku) and period (Tu): Kp = 0.6 * Ku, Ti = 0.5 * Tu, Td = 0.125 * Tu for PID controllers. The chart shows a simulated step response, and results can be exported as a PDF or CSV.