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Alarm Handling

Alarm Handling. Oliver Holme 7 th November 2007. Guidelines & Strategies. All provide recommendation to use Framework Classes Standard severities/ behaviour /colours Warning (Yellow) Error (Orange) Fatal (Red) All provide recommendation to use Framework tools

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Alarm Handling

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  1. Alarm Handling Oliver Holme 7th November 2007

  2. Guidelines & Strategies • All provide recommendation to use Framework Classes • Standard severities/behaviour/colours • Warning (Yellow) • Error (Orange) • Fatal (Red) • All provide recommendation to use Framework tools • Library functions, panels etc. • Alarm console runs on a separate PVSS system/computer • ATLAS - Iterative approach used to reduce alarms • LHCb - Not using acknowledgeable alarms

  3. Requirements & Priorities No filtering, but allows AS12

  4. Requirements & Priorities With alarm limits in the trend

  5. Requirements & Priorities

  6. Other Points - ALICE • Archiving & retrieval of alerts from ORACLE is too slow • How to inject alarms from external systems – Sniffer? • How to handle alarm help for these external alarms? • System for checking & testing alarms inside the DCS • Tool for looking at (remote) systems to see the alarm configuration • Gather statistics on numbers of alarms, groupings, thresholds etc. • Test trigger of alarms in the DCS (not from hardware level)

  7. Other Points - ATLAS • Some method to categorize alarms • Move/classify alarms into categories • Option to provide a comment when moving category • Filter on category of alarm • View number of alarms in each category • Web based alarm screen required

  8. Other Points - CMS • Passing parameters for the Alarm Help • Possible parameters should include • Trigger Value, Alarm limits, Alias, Description, DpName • Tool to assign help URI to many DPs • Distinction between alarms seen at sub-detector only or on central system • Could be based on two different ranges of priorities • INFO class for alarms

  9. Other Points - LHCb • How to inject alarms into PVSS? • PVSS functions to inject & clear alarms • Either clear alarms manually or after a period of time • New details panel should show alarm limits and current online value • How to avoid viewing alarms from systems “above” in the distributed system?

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