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Published byJanel Taylor Modified over 9 years ago
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Definition: Automation is the use of control systems for operating equipment with minimal or reduced human intervention. + save labour + reproducibility + accuracy - high initial investment - increased complexity - knowledge loss - erroneous behaviour in unforesee situations
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WIR SCHAFFEN WISSEN – HEUTE FÜR MORGEN Automation Overview with Examples from the SLS Andreas Lüdeke :: Operation Manager Swiss Light Source :: Paul Scherrer Institut at the MAX-IV Automation Review Meeting, 3. - 4. Dec. 2015
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Know the task! desired sequence possible failures success? Avoid “black boxes” knowledge loss silent failures critical situations Best Practices Page 3
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Accelerator start-up checklists sequencing reports Device automation example: RF start-up example: RF tuning-loop Semi-automated operator procedures example: “Open ID gaps” / “Close ID gaps” Areas of Accelerator Automation Page 4
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Automated measurements example: beam lifetime example: BBA Failure reporting example: RF first-fault example: magnet PS failure reports Failure recovery example: RF tuning loop example: restore beam after trip Areas of Accelerator Automation Page 5
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Ergonomic Tools Consistent Structured Task focussed Fault tolerant Responsive Support memory Ergonomic Operator Interfaces Page 6
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Task focussed Operator Interface P SI, RF control Operator tasks: Trip recovery Set voltage Set phase RF control Operator tasks: Trip recovery Set voltage Set phase Page 7
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Task focussed Operator Interface P SI, RF control Operator tasks: Trip recovery Set voltage Set phase RF control Operator tasks: Trip recovery Set voltage Set phase Dedicated Panel for Operation Dedicated Panel for Operation Page 8
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B.R. Hollifield, Alarm Management: Seven Effective Methods for Optimum Performance Alarm handler objectives acoustic alarm if operator intervention required every possible problem should raise an alarm no alarm, if no operator intervention is required! provide guidance Alarm handler is THE central operator tool Alarm Management Best Practices Page 9
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Characteristics of a good alarm Relevant Unique Timely Prioritised Understandable Diagnostic Advisory Focussing HSE Alarms Strategy: EEMUA Guide, Experience, IEC61508/11 Alarm Management Best Practices Page 10
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Nuissance / chattering alarms Operator action undefined Stale alarms “Shelving” Alarm storms Wrong alarm priorities Alarm Management Problems Page 11
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Define “Alarm Philosophy” Every alarm is documented and has an identified response Alarm must not be ignored! What alarms, which priorities and guidance? Responsibilities, Key Performance Indicator Regular Alarm Performance Report Analyse alarm frequencies Lists of nuisance and stale alarms Define action plan and assess progress Alarm Management Best Practices Page 12
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Alarm Documentation and Rationalization Create alarm priority grid Document each alarm type: causes, corrective actions, consequences, time to respond, desired modifications, … Alarm trip-point determination Operator Training Alarm philosophy Handling and reporting nuisance alarms Controls applications regarding alarms Who can change what: alarm trip levels, alarm disabling Alarm handling strategies: Shelving, State-Based, Flood Suppression, … Proper and improper alarm suppression Alarm Management Best Practices Page 13
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Ingredients to successful automation Know your tasks Avoid “black boxes” Comprehensive automation Start-up Devices Operator procedures Measurements Failure reporting Failure recovery Proper user interface design Alarm handler Alarm management
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