A PLC is a user friendly; microprocessor-based specialized equipment that carries out many types of control functions with levels of complexity for use in industrial automation applications. Its objective … Read more
Reset/Integral control describes a controller in which the output rate of change is dependent on the magnitude of the input. Specifically, a smaller amplitude input causes a slower rate of change of the output. This controller is … Read more
In the proportional control mode, the final control element is throttled to various positions that are dependent on the process systems conditions. The controller operates within a band that is between the 0 % output point and … Read more
Processes have the characteristics of delaying and retarding changes in the values of the process variables. Process time lags generally describe these process delays and retardations. Process time lags are caused by three properties of the process. They include:
A controller is a device that generates an output signal based on the input signal it receives.
The input signal is actually an error signal, which is the difference between the measured variable, and the desired value, or setpoint.
The … Read more
Lubricating oil reduces friction between moving parts and also removes heat from the components. As a result, the oil becomes hot. This heat is removed from the … Read more
The basic elements of a feedback control system are represented by the block diagram below. The functional relationships between these elements are also shown in the diagram.
The block diagram represents flow paths of control … Read more
