A PID controller is named after the Derivative, Integral and Proportional control modes that they are having. They are used in the process of control applications in various industries. A PID controller can be used for regulating the flow, pressure, temperature, level and much more. Here, we will explain the P,I and D control modes.
Manual control
If there are no automatic PID Controllers, tasks have to be done manually. For instance, the temperature of the water has to be kept constant. Operator will have to watch temperature gauge and the fuel gas valve has to be adjusted as per that. if the temperature of water is too high, the gas valve has to be closed, so that temperature can be brought back to the value desired. If the water is too cold, the gas valve has to be opened.
Feedback control
Feedback control is named so, because the rate of firing is changed by the operator on the basis of feedback that he would be getting from the process through temperature gauge. You can do feedback control manually, but many a times, it is done automatically too as explained further.
Control loop
Control loop is formed by a temperature gauge, process, valve and an operator. If changes are made by the operator to the gas valve, the temperature is affected and the loop is closed.
If there are no automatic PID Controllers, tasks have to be done manually. For instance, the temperature of the water has to be kept constant. Operator will have to watch temperature gauge and the fuel gas valve has to be adjusted as per that. if the temperature of water is too high, the gas valve has to be closed, so that temperature can be brought back to the value desired. If the water is too cold, the gas valve has to be opened.
Feedback control
Feedback control is named so, because the rate of firing is changed by the operator on the basis of feedback that he would be getting from the process through temperature gauge. You can do feedback control manually, but many a times, it is done automatically too as explained further.
Control loop
Control loop is formed by a temperature gauge, process, valve and an operator. If changes are made by the operator to the gas valve, the temperature is affected and the loop is closed.
For more Information Visit at: Temperature Controller
