samedi 24 mai 2014

Guide To Siemens HMI Software

By Marci Glover


Human-machine interface (HMI) refers to the layer that separates a human being who is using a computer from the machine itself. An example of a human-machine interface is the hardware and Siemens HMI software of a computer, which makes it possible for a single operator to control a machine. The user interface comprises the flow of information to support decision-making, through visual messages - generally provided by a screen or monitor; sound messages - speakers, headphones; control actions - keyboards, buttons, switches.

A set of multiple monitors, devices and control surfaces form a console or management station. From a console, an operator receives notifications and performs control actions. A control room may contain one or more control stations. The control rooms and control stations can be found in many different applications, such as control tower of an airport, control center for police and ambulances and nuclear power plant. The design of the passenger compartment of airplanes and helicopters includes the highly specialized user interfaces.

Human-computer interaction has differences with the human factor (accounted in ergonomics and usability), it focuses more on users working with computers rather than with other types of equipment. HCI also focuses on the implementation of software and hardware to support the interaction. Thus, the human factor is a broader concept. HCI can be characterized as the human factor - although some experts are trying to divide the data area.

The term human-machine interface is sometimes used to refer to what is best described as direct neural interface, or some imaginary technology can make a direct connection between the human nervous system and a computer. The user interface is to be understood as an intermediary between man and machine, and may include both the hardware and software side of a machine.

Ergonomic studies have also emphasized the relation of working conditions with stress and the visual perception of images. In assessing the current user interface, or developing new interfaces, designers should keep in mind the following principles of development: From the outset, it is necessary to focus on users and tasks. Set the number of users who are required to perform tasks. Iterative design involves determining the number of users, tasks, making empirical measurements.

Industrial computers, PLCs are still largely equipped with pushbuttons and LEDs. In the car, people first interacted with simple mechanical means and the evolution of computing and robotics led to more sensors and information available to the driver who has to choose the action to perform via the steering wheel, brake pedal and various switches (lights, cruise control).

The main task of human-computer interaction is to improve the quality of interaction, making computers easier to use and responsive to user needs. Long-term goal of human-computer interaction is to develop a system that will reduce the barrier between the human cognitive model and understanding of computer assigned tasks. HMI specialists usually deal with the practical application of development methodologies to real global problems. Their work often revolves around the development of graphic and web interfaces.

Researchers are involved in the development of new methods of design, experimentation with new hardware devices, prototyping new software systems, exploring new paradigms for interaction and the development of theories and models of interaction. In a study of Personal Information Manager (PIM), human-computer interaction makes it an expansive information environment - people can work with various forms of information to understand and effectively influence the desired changes.




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