Currently, the Proportional-Integral-Derivative (PID) algorithmis the most

common control algorithm used in dustry. Often, people use PID to

control processes that include heating and cooling systems, fluid level

monitoring, flow control, and pressure control. In PID control, you must

specify a process variable and a setpoint. The process variable is the system

parameter you want to control, such as temperature, pressure, or flow rate,

and the setpoint is the desired value for the parameter you are controlling.

A PID controller determines a controller output value, such as the heater

power or valve position. The controller applies the controller output value

to the system, which in turn drives the process variable toward the setpoint

value.-Currently, the Proportional-Integral-Derivative (PID) algorithmis the most

common control algorithm used in industry. Often, people use PID to

control processes that include heating and cooling systems, fluid level

monitoring, flow control, and pressure control. In PID control, you must

specify a process variable and a setpoint. The process variable is the system

parameter you want to control, such as temperature, pressure, or flow rate,

and the setpoint is the desired value for the parameter you are controlling.

A PID controller determines a controller output value, such as the heater

power or valve position. The controller applies the controller output value

to the system, which in turn drives the process variable toward the setpoint

value.