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A didactic PID controller implementation for water level control is detailed. Hardware is comprised a comprised of pump, pipelines and various connecting elements, flow valves, a DANFOSS proportional valve, a FLOWLINE DL10 ultrasound level sensor and Simatic WinCC in a Siemens S7300 PLC. Experimental tests allowed estimating process parameters, that were used to calculate the control gains before a unit step forcing function. The deduced ideal process equation was used as the plant of a Simulink model to compare against experimental findings. Under moderate changes in the set point, proportional (P) control exhibits the best performance with a rapid response time. PID control was advantageous when the control variable is near the set point (small changes) since the valve opening requires more time for relatively big set points. 160 A. Simmonds-Mendoza, N. Cabrera-Londoño, N. Berdugo-Barandica, J. Roldán-Mckinley, E. Yime-Rodríguez

Implementación de control PID de nivel en laboratorio usando PLC Siemens S7-300