In industrial and process control, it is often necessary to accurately control the temperature of a process. You control most heating elements using the “bang-bang” method—turning the power to them on ...

Machines and processes are controlled using many strategies, from simple ladder logic to custom algorithms for specialized process control, but proportional-integral-derivative (PID) is the most ...

The ABCs of PID control. Considerations for interfacing elements in the electrical circuit to accomplish those parts of the PID function for position control. Firmware code implementation.

PID loops are a central component of modulating boiler control systems with applications ranging from basic steam header pressure control to cascading 3-element drum level control. A modern ...

My article in the Aug. 2 issue of The News reviewed conventional thermostatic expansion valves (TEVs or TXVs) and covered the basic operation of electronic expansion valves (EEVs). This column will ...

DESIGN VIEW is the summary of the complete DESIGN SOLUTION contributed article, which begins on Page 2. Although analog and digital controllers may appear vastly different, their principles of ...