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Expectations to a Control System from Different User Groups Stefan Wilke DESY, MST PowerPoint PPT Presentation


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Expectations to a Control System from Different User Groups Stefan Wilke DESY, MST Heiko Ehrlichmann DESY, MPE. Until now: Status and Progress of Control Systems, Technical Details, System Administration, Concepts, Tools,. What’s about the users?.

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Expectations to a Control System from Different User Groups Stefan Wilke DESY, MST

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Expectations to a control system from different user groups stefan wilke desy mst

Expectations to a Control System from

Different User Groups

Stefan Wilke DESY, MST

Heiko Ehrlichmann DESY, MPE


Expectations to a control system from different user groups stefan wilke desy mst

Until now:

Status and Progress of Control Systems,

Technical Details,

System Administration,

Concepts, Tools, ...

What’s about the users?

  • (control system constructors)

  • chief of a machine

  • guest (WWW)

  • persons who care for components

  • operator on shift


Requirements to a control system

Requirements to a Control System

other layer (no machine operating):

secure, stable, uniform solutions, easy maintenance


Expectations to a control system from different user groups stefan wilke desy mst

Main goal:

efficient, stable, smooth operation

and happy experiments.

perfect control system

pleased and motivated shift crew

Could there be both?

How?

What do a operation crew want?


Expectations to a control system from different user groups stefan wilke desy mst

  • The operation crew want:

  • A comfortable shift!

  • ergonomic

  • automation

  • participation in consol program design

  • stability


Expectations to a control system from different user groups stefan wilke desy mst

Official rules for work at consols

(ISO/DIS 9241-10, 1993)

(DIN 66234-8)

  • Suitable for the task

  • Self-explaining

  • Controllability

  • Perform user expectations

  • Error tolerance

  • Modification for user individual needs are possible

  • ...


Conventional wisdoms i

Operators view

Conventional Wisdoms I

  • eye friendly backgrounds / contrast (not white)

  • fonts (text and numbers), buttons and controls not too small

  • color codes (green: ok, yellow: selected or warning, red: error)

  • not too much color on the screen

  • no overlapping windows (prevent covered information)

  • no delay to user actions (at least a hourglass)

  • enough data - but not too much!

  • suitable update rate (not too fast, not too slow)

  • consistent data at all consol and all displays

  • separation of status and operating (no status on command button)


Conventional wisdoms ii

Operators view

Conventional Wisdoms II

  • stability in operation

  • no cryptic error messages (“Error 42”, “FPSS Time Out”)

  • a helpful alarm system! (only real errors, acoustic on main errors)

  • no extreme hierarchical menu structure (climbing up/down trees)

  • compact operation (e.g.: no switching sequence at different terminals)

  • no operation from outside without permission by the operator

  • variability (to changing and additional whishes)

  • archiving (all relevant information for offline - correlations)

  • documentation


Expectations to a control system from different user groups stefan wilke desy mst

Automation!?

good for

But

need of reliable data

need of very(!) good error- and alarm system

transparence needed (no hidden procedures)

shift crew becomes stupid

nobody could run the machine ‘by hand’ anymore

lost of feeling to the machine

which procedures should become automatic?

how deep?


Expectations to a control system from different user groups stefan wilke desy mst

Examples of automation at DESY

HERA sequencer

PETRA autopilot


Expectations to a control system from different user groups stefan wilke desy mst

The Future?


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