HMI (Human Machine Interface)
HMI(Human Machine Interface) is a GUI (Graphic User Interface) based controller operating panel. It represents the interface between man(operator) and a process(machine/process). HMI systems can be installed in plants for alarms, reliable messaging, overall management, accurate testing, etc. The purpose of HMI is to make the function or purpose of an automation tasks self-evident and easy to understand so that even an operator who doesn’t have knowledge of controllers or computer can operate as well as monitor the entire automation tasks.
Some HMIs also translate data from industrial control systems into human-readable visual representations of the systems. Through the HMI, an operator can see schematics of the systems and turn switches and pumps on or off, for example, or raise or lower temperatures. HMIs are usually deployed on Windows-based machines, communicating with programmable logic controllers (PLC) and other industrial controllers.