expectations to a control system from different user groups stefan wilke desy, mst
DESCRIPTION
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?. - PowerPoint PPT PresentationTRANSCRIPT
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Expectations to a Control System from
Different User Groups
Stefan Wilke DESY, MST
Heiko Ehrlichmann DESY, MPE
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What’s about the users?
Until now: Status and Progress of Control Systems,Technical Details,System Administration,Concepts, Tools, ...
• (control system constructors)
• chief of a machine
• guest (WWW)
• persons who care for components
• operator on shift
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Requirements to a Control System
who information action
guest selection no
operator on operator on shiftshift
compact easy, self explaining, secure, coincide
chief of a machine
in detail extensive, variable
persons who care for components
special, much more details
special, extreme deep
control system constructors
other layer (no machine operating): secure, stable, uniform solutions, easy maintenance
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What do a operation crew want?
Main goal:
efficient, stable, smooth operationand happy experiments.
perfect control system
Could there be both?
pleased and motivated shift crew
How?
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The operation crew want:
A comfortable shift!
• ergonomic• automation• participation in consol program design• stability
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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• ...
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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)
Operators view
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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
Operators view
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Automation!?
good for
But need of reliable dataneed of very(!) good error- and alarm systemtransparence needed (no hidden procedures)
shift crew becomes stupidnobody could run the machine ‘by hand’ anymorelost of feeling to the machine
which procedures should become automatic?how deep?
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PETRA autopilot
HERA sequencer
Examples of automation at DESY
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The Future?