The user interface in a manufacturing or process control system. It provides a graphics-based visualization of an industrial control and monitoring system. Previously called an “MMI” (man machine interface), an HMI typically resides in an office-based Windows computer that communicates with a specialized computer in the plant such as a programmable automation controller (PAC), programmable logic controller (PLC) or distributed control system (DCS). Contrast with OI. See PAC, PLC, DCS, GUI and user interface.
A Distributed Control System (DCS) is an automated control system that monitors and provides instructions to different parts of a machine. Commonly used in manufacturing equipment, a DCS utilizes input and output protocols to control distributed equipment. DCS systems are commonly used in process industries controlling breweries, refineries, chemical plants, paper mills, etc. The elements of a DCS may connect directly to physical equipment, such as controllers, historians and to Human Machine Interface (HMI) via SCADA.
An AC drive is a device used to control the speed of an electrical motor in an energy-efficient way. It can also be utilised to convert energy from natural and renewable resources like the sun, wind or tides, and transmit it to the electrical network or for local consumption. In hybrid technologies, AC drives are used to combine conventional energy sources and energy storages to create total energy management solutions.
SCADA systems are used by private companies and public-sector service providers. SCADA works well in many different types of enterprises because they can range from simple configurations to large, complex projects. • Virtually anywhere you look in today’s world, there is some type of SCADA system running behind the scenes, whether at your local supermarket, refinery, waste water treatment plant, or even your own home.
Instrumentation is defined as the art and science of measurement and control of process variables within a production or manufacturing area. The process variables used in industries are Level, Pressure, Temperature, Humidity, Flow, pH, Force, Speed etc. Control engineering or control systems engineering is the engineering discipline that applies control theory to design systems with desired behaviors.Control engineers are responsible for the research, design, development and control devices/systems, typically in manufacturing facilities.