maxDNA Overview

Transcript maxDNA Overview

MODULE TWO

HUMAN MACHINE INTERFACE

Operator Interface

Keyboards

  Operator restricted access (no alpha); dedicated keys Engineer full access; less secure

Pointing Devices

  Cursor Keys: precise but slow (drawing) Mouse: fast, needs space, less precise, some fatigue factor (Ok for general use)   Trackball: fast, little space, most precise, least fatigue (recommended) Touchscreen: intuitive, no space, least precise, security problem, fatigue, special graphics rules, dirty screens © Metso Automation Inc. 2005

Custom Control Pop-Ups

      Specialized task and data Grouped tasks Sequences and prompts Alarm responses Fast access High detail © Metso Automation Inc. 2005

Security Levels of Operator Empowerment

   View-only access: groups, selected displays, pop-ups Control access: selected parameters, point security, special pop-ups.

Configuration access: detail and terminal displays

1 or 2 Step Operations

   Balanced speed vs. accidental action Touchscreen must be multi-step Consistent confirmation vs. habitual response

Data Entry

  Direct numerical: fast, precise, but subject to gross error (4.0 vs. 40.0) + and – buttons: slow, secure, subject to overshoot  Avoid duplicating controls on every display, pop-up and object  © Metso Automation Inc. 2005 Use Operator Keyboard or common control pop-up

Human Factor Standards

Viewing Distance

   Object and text size (e.g. 13 pt text...3 ft ( 1 m)).

Monitor size, resolution, dot pitch Test sample monitor

Dimensional Coding

    Primary coding (minimize color use) Special metaphors (3D) Faster response Not subject to color perception deficiencies © Metso Automation Inc. 2005

Color Coding

  Use carefully, sparingly and consistently Special rules for video

Selectable Objects

 Consistent indication of selectable objects (recommend button metamorph)  Consistent indication of results of selection (control action, point selection, display swap, ...)   Immediate feedback (movement preferred over color change) “Soft” feel Remote Processing Unit Components © Metso Automation Inc. 2005

Fonts

   Proportional, sans-serif, upper/lower case (Arial recommended) Minimum size 10pt 13 to 24 pt typical

Contrast Management

 High contrast for most critical data and messages long, distance viewing     Low contrast for reference, labels, and data close viewing Use wide “dynamic range” Manage glare with neutral backgrounds and controlled lighting Drop shadow for variable background

Data Density Management

  25% open space Use space (not lines) to separate items © Metso Automation Inc. 2005

Test Concepts

     View from different distances and angles View with different lighting Evaluate first impression and long duration Test color schemes on monitor (not paper) Observe user error, frustration, confusion

Aesthetics

  Form follows function - justify every design element first by its utility Careful use of purely aesthetic elements can result in a human interface that is attractive, modern looking and enjoyable to use © Metso Automation Inc. 2005

Operational Scenarios

       Compile list for every hierarchical identifier: “If x happens, I must view

a ,b, c

and take action

1, 2, 3,

...”  Categorize by severity (e.g., Trip; will eventually lead to Trip; requires maintenance within 24 hours) Identify points and attributes to be viewed Identify control actions to be taken Identify control sequences, permits, etc Identify multi-point, simultaneous actions Identify display or special popup requirements Maintain log of new scenarios © Metso Automation Inc. 2005

Documentation and Control

 Establish controlled documentation for each display and popup

Document Includes:

      Default hierarchical identifiers Tagname referenced Local and Global variables used Pop-ups and bitmaps required Standard and custom objects used Function keys defined

Establish Backup, Distribution, and Documentation Control Policy

Is distribution by disk or network propagation?

Who controls distribution of display updates?

Check-in/check-out procedures for display updates.

Display Outlines

Sketch a Display for Every Hierarchical Identifier

     Major objects Generic point names/attributes Display swap buttons Control buttons Static/dynamic Bitmap areas

Refer to Operational Scenario List

 Confirm that all needs are addressed consistent with security and response time requirements © Metso Automation Inc. 2005

Standard Objects

Identify Standard Objects

 Pumps, valves, tanks, point selection, control buttons

Describe Functionality

      Static elements Dynamics (bar charts, area fills, conditional color change) Live data (# of digits) Logic functions Points/attributes required Do not build static objects before dynamics are defined © Metso Automation Inc. 2005