PID controller is a well known controller which has been used widely in the industry. The significant thing in the design of PID controller is tuning of its parameters. From many tuning methods which has been developed today, Direct Synthesis tuning method is chosen for this experiment.
Generally, PLC is used to control the sequence. But we can use it as digital PID controller too by using ASCII module (Omron) which can adapt with BASIC. By integrating PLC as PID controller and DC motor as the plant, Direct Synthesis tuning method can be implemented in that plant.
From the experiment's result, it has been proved that by using PID controller with Direct Synthesis tuning method, the plant's performance criteria has been improved significantly.