A Human Machine Interface (HMI) is a graphic based visualisation of an industrial control and monitoring system that is a software application demonstrating information to an operator or a user about the state of a process, and to accept and implement the operator control instructions. An HMI presents an interface, human vs. machine interaction to effective operation and control of the machine by human in a manufacturing or process control system. (e.g., the programmable automation controller (PAC), programmable logic controller (PLC), distributed control system (DCS), or supervisory control and data acquisition (SCADA) system, etc.) An HMI was previously called the Man Machine Interface (MMI).
Related Definitions in the Project: The Engineering; CSI Engineering; Interface Management
