Alarm Management at Jefferson Lab

1
Alarm Management at Jefferson Lab

• A New Configuration and Extended Capabilities
• B. Bevins, M. Joyce, J. Sage

2
Outline

• New Requirements
• ALH Usage
• ALH Modifications
• CDEV Modifications
• Other Development
• Status

3
New Requirements

• Motivated by a new control room design
• Global acknowledgement
• Global disabling
• Smarter automatic disabling
• Centralized logging
• Geographical view of accelerator
• Make alarms more meaningful
• Motivated by maintainability
• Automatic generation of configuration files
• Separate configs for operators and experts

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Old Control Room
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New Control Room
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Changes to ALH Usage

• Thorough review of alarm parameters
• Removed extraneous alarms
• Determined where to ignore transients and of what
  duration
• Readable alias names used throughout
• Use ALH in global mode
• Master copy manages alarm logic
• Operators open copies to acknowledge
• Logs to CMLOG
• FORCEPVs to disable (automatic and manual)
• SEVRPVs to summarize alarm state in MEDM

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ALH Modifications

• Uses CDEV transparently
• Wasnt quite working before
• Uses CHANNEL keyword rather than CDEV keyword
• Also works for FORCEPV, SEVRPV, etc.
• Unacknowledged Severity PVs
• New keyword UASEVRPV works like SEVRPV
• Disabling a group/channel updates parent group
  severity PVs (both types)

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Why CDEV?

• Legacy high level RF system diagnostics
  calculated in CDEV-based RF Alarm Server
• Allows alarms on other CDEV-based high level beam
  applications servers
• Slow locks, real-time optics model, etc.
• Alarm states can now be monitored and
  acknowledged directly from Tcl-CDEV applications.

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CDEV Modifications

• CA Service Enhancements
• Supports ack and ackt messages
• Allows unAckSevr and ackTrans tags (along with
  severity, status, etc.)
• Allows correct canceling of monitor requests
• Now matches the documentation
• Prevents buffered callbacks from being delivered
  after a monitor has been canceled

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Other Development

• makeALHConfig - Perl scripts to generate config
  files and sponsor FORCEPV and SEVRPV soft
  channels on a Proxy IOC (PIOC)
• 15,372 alarms
• 11,463 PVs on PIOC
• alhDisable - Tcl program to manage FORCEPVs and
  manually disable alarms
• Generates reports of all currently disabled
  alarms for shift changes, etc.
• Makes an entry in the Logbook.

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Alarm Summary Screen
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Alarm Disable Tool
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Status

• New automatically-generated configuration has
  been in use for several months.
• Vast improvement alarms are no longer silenced
  and ignored.
• Global alarm management is being tested and
  should be fully deployed in May.
• Modified CDEV will be released soon after through
  the CDEV website http//www.jlab.org/cdev/.
• ALH changes will be submitted for inclusion in
  new releases.

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Alarm Management at Jefferson Lab

• A New Configuration and Extended Capabilities
• B. Bevins, M. Joyce, J. Sage