12 Facts About Process control

An industrial process control in continuous production processes is a discipline that uses industrial control systems to achieve a production level of consistency, economy and safety which could not be achieved purely by human manual control.

The development of large industrial process control systems was instrumental in enabling the design of large high volume and complex processes, which could not be otherwise economically or safely operated.

Early process control breakthroughs came most frequently in the form of water control devices.

Continuously variable process control it was not until 1922 that a formal control law for what we now call PID control or three-term control was first developed using theoretical analysis, by Russian American engineer Nicolas Minorsky.

Process control noted the helmsman steered the ship based not only on the current course error, but on past error, as well as the current rate of change; this was then given a mathematical treatment by Minorsky.

Process control's goal was stability, not general control, which simplified the problem significantly.

However, whilst providing a central control focus, this arrangement was inflexible as each control loop had its own controller hardware, and continual operator movement within the control room was required to view different parts of the process.

The Process control model is a set of equations used to predict the behavior of a system and can help determine what the response to change will be.

The control of the water temperature in a heating jacket, for example, is an example of continuous process control.

Fundamental building block of any industrial control system is the control loop, which controls just one process variable.

The system diagram for representing Process control loops is a Piping and instrumentation diagram.

The competing factor in process control is that products must meet certain specifications in order to be satisfactory.