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Design Considerations for Effective Human Machine Interface Systems

Publisher: EAO Corporation
Overview:
Explaining briefly about the operations of Human Machine Interface system, this paper presents the factors that should be considered while designing an effective HMI system. It states HMI system as the principal point of contact between the user and a machine or process, and details how a high-reliable HMI system will rely on application of engineering best practices throughout design and panel layout production, testing, and quality assurance processes. Operational/functional requirements such as general functionality, operator feedback, lifecycle durability, environmental considerations, and style are listed in the paper. Figures illustrating a locomotive HMI system that includes alarm and status signals from a variety of the vehicle's subsystem are also included. The paper details complete safety and application considerations which are to be practiced for designing an HMI system.
TABLE OF CONTENTS
1.Why Is Well-Considered HMI Design Important1
2.How Do You Design an HMI System2
3.Defining the Operational/Functional Requirements2
3.1.General Functionality2
3.2.Degree of Input Complexity3
3.3.Operator Feedback3
3.4.Interface/Interconnection with Other Systems3
3.5.Environmental Considerations3
3.6.Lifecycle Durability3
3.7.Style3
3.8.Regulatory/Standards Considerations4
4.Define the Operator4
4.1.Operators4
4.2.Supervisors4
4.3.Maintenance4
4.4.Panel Layout4
4.5.HMI Component Selection5
4.6.Color Scheme5
4.7.Information Presentation5
4.8.User Feedback5
5.How Do You Choose the Best Control Technologies Appropriate to the Application6
5.1.Cursor Control (Trackball, Joystick, Keypad, Touchpad, etc.)6
5.2.Switches (Pushbutton, Rocker, Slide, Keylock, Rotary, etc.)6
5.3.Short Travel Technologies (Conductive Rubber, Membrane, Keyboard, Keypad, etc.)6
5.4.Touch and Switching Technologies, (Capacitive, Piezo, High frequency, etc.)7
5.5.Display Technologies (LCD, Active Matrix, OLED, FED, Plasma, etc.)7
5.6.Interactive Displays, Touchscreen7
5.7.Motion Control8
6.Connecting/Communicating with an HMI System8
6.1.Hard-wired Connections8
6.2.Serial Bus Systems8
6.3.Wireless Connections/Communications9
7.Safety Considerations10
8.Applications11
8.1.Manufacturing and Process Industries11
8.2.Transportation Industry12
8.3.Semiconductor Production13
8.4.Medical Equipment13
8.5.Public Access14
9.Figures
9.1.An HMI System Is the Principle Point of Contact Between User and Equipment1
9.2.In Depth Knowledge of Relevant Ergonomic, Safety, and Industry Standards Is Critical to an Effective2
9.3.It Is important to Provide Control for All Required Operations HMI System2
9.4.In Public Transactions, a Well-designed HMI System Can Simplify Complex Operations3
9.5.If an HMI System Fails, It Is Often Perceived as a Failure of the Core System3
9.6.Panel Layout, Switch Selection, Information Presentation, and Feedback Are Important Considerations for Operator and User or Patient4
9.7.Operator Feedback Can Be Visual, Auditory, Tactile, or Any Combination5
9.8.It's Important to Provide Intuitive Feedback to the Operator for a Rapid Response6
9.9.A Joystick Can Provide Granular or Fine Control6
9.10.Short Travel Technology Can Be Provided with Flush Resilient Surfaces6
9.11.Interactive Displays Provide the User Required Information When Needed7
9.12.Hardwired Connections Are Still Used in Many Applications8
9.13.Bus Systems Simplify Wiring and Provide Easy Addition of New Functionality9
9.14.Observing Appropriate Safety Standards Assures That a Product Will Meet Industry Criteria10
9.15.In an Industrial Environment, HMI System Design Is Primarily about Functions11
9.16.An HMI System for a Locomotive Could Include Alarm and Status Signals from a Variety of the Vehicle's Subsystems12
9.17.EtherCAT Has Been Specifically Developed for the Semiconductor Environment13
9.18.Security Is an Important Factor in Public Access Applications14
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