definition: automation is the use of control systems for operating equipment with minimal or reduced...
Post on 19-Jan-2016
217 Views
Preview:
TRANSCRIPT
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
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
•Know the task!- desired sequence- possible failures- success?
•Avoid “black boxes”- knowledge loss- silent failures- critical situations
Best Practices
Page 3
•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
•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
Ergonomic Operator Interfaces
Page 6
Task focussed Operator Interface
PSI,
RF controlOperator tasks: • Trip recovery• Set voltage• Set phase
Page 7
Task focussed Operator Interface
PSI,
RF controlOperator tasks: • Trip recovery• Set voltage• Set phase
Dedicated Panelfor Operation
Page 8
•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
•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
•Nuissance / chattering alarms•Operator action undefined•Stale alarms “Shelving”•Alarm storms•Wrong alarm priorities
Alarm Management Problems
Page 11
•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
•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
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
top related