Human Machine Interface
A human-machine interface (HMI) is the user interface that connects an operator to the controller for an industrial system. An HMI includes
electronic components for signalling and controlling automation systems.
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.