Compare and Contrast the Physical and Logical Views of Data

question 74

Essay

Compare and contrast the physical and logical views of data.

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Definitions:

Solenoid

A coil of wire designed to create a magnetic field when an electric current is passed through it, often used to control valves or relays.

Relay

An electrically operated device that mechanically switches electric circuits.

Final Control Element

A device that directly manipulates a process variable to achieve a desired change, such as a valve or a motor.

Proportional Controller

A type of feedback controller that generates an output signal by multiplying the error between a desired setpoint and a measured process variable by a constant.