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General control loop block diagram. Controller output Signal, CO. Controller error e(t) = (SP – PV). Manipulated variable. Process variable. set point, SP. Final Control Element (FCE). Controller. Process. +. _. measured process variable signal, PV. disturbance, D.
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General control loop block diagram Controller output Signal, CO Controller error e(t) = (SP – PV) Manipulated variable Process variable set point, SP Final Control Element (FCE) Controller Process + _ measured process variable signal, PV disturbance, D Measurement Sensor/Transmitter