-any point where data is communicated from a worker to a computer or from a computer to a worker Data entry programs, inquire programs, reports, documents, LED displays, and voice commands are all examples of human-machine interfaces
Also referred to as a GUI (graphical user interface) or MMI (man machine interface), this is a process that displays graphics and allows people to interface with the control system in graphic form It may contain trends, alarm summaries, pictures, or animation It is usually classified as a separate task within a multitasking environment like QNX In Windows, the GUI/HMI/MMI program may claim to also provide the control features needed in the system Very often this is not true, and when it is true, these control programs still have to run on a Windows platform that Cogent considers too unstable for high availability systems
Human Machine Interface (HMI) is the term used to describe the factors related to the way humans and technology interact Because of the complexities, variables and unpredictable nature of HMI human factors and related studies are moving into the fore front and are helping us better define this complex relationship, and most importantly develop models which predict and adequately prevent dangerous problems from repeatedly occurring The increase in automated functions changes the human role which in turn directly impacts the design of the HMI
Also known as Man Machine Interface (MMI) A device able to present information to the operator about the state of a process, and to accept and implement the operators control instructions It may also interpret the plant information and guide the interaction of the operator with the system