Wiring Diagrams of PLC and DCS Systems – DI, DO, AI, AO
PLC and DCS control systems Wiring Diagrams for Digital Input (DI), Digital Output (DO), Analog Input (AI), and Analog Output (AO) signals.
Control Systems
We have the largest collection of Industrial Control Systems articles like industrial automation, Distributed Control Systems (DCS).
How to Implement Ratio Control in this System?
A variety of chemicals are added to raw water when treating it for human consumption, and also when treating water
Questions on Ratio Control System
A byproduct of the kraft process used in the paper industry for turning wood chips into pulp is a liquid
Fault in the Temperature Loop
An operator tells you the stack temperature of this incinerator is running high as indicated by TIC-37. The setpoint is
Temperature Controller Problem
Suppose a chemical reactor is heated by steam. A temperature controller varies the amount of steam admitted to a “jacket”
How Valve Positioners act as Cascade Control Systems in a Loop?
Explain how all valve positioners essentially act as cascade control systems in a loop, and why valve positioners generally improve
What LIC and FIC Controllers will do?
In this example problem, we discuss about both LIC and FIC controllers and what will they do over time if
Problem in Water Level Control System
This water level control system (for a municipal water supply operation) is supposed to maintain constant water level in the
Burner Safety Logic for Initial Lighting
In this article we will go throw some Standard burner safety logic for initial lighting of the burner and also
Problem on Pressure and Level Control Loops
Examine these pressure and level control loops (transmitter-controller-valve systems) for an industrial boiler, controlling both water level and steam pressure: