The two loops considered in this work are Liquid level control loop and Flow control loop which are then cascaded to form a Cascade control loop. Both loops are in cascade and controlled by a suitable controller based on different control configurations and strategies. These loops utilize industry grade electromagnetic flow and level transmitters. The electromagnetic meters are essentially used in measurement of the displacement or bulk movement of liquids in a process control application. In this work cascade control is used for both loops LFC and LC to improve control system performance. In this case two controllers are used; one controller is the master controller which monitors the controlled variable. This controller provides a setpoint to the secondary or slave controller whose job is to monitor primary disturbances. The level inside the liquid tank is the controlled variable in this experimental setup. or slave controller is the output signal from the master controller i.e., the flow. The advantage of cascade control in this system is to minimize the effect of nonlinearities occurred in the final control element in the flow loop. Here in this poster methodology of cascade control is presented with loop components such as flow and level transmitters, controllers, communication protocols, control configurations.
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