Variable and data events

Variable and data event types, generators, triggers, and use cases for
FactoryTalk Optix Applications
.
Event types
Event type
Generator
Trigger
Use cases
Examples
VariableCondition event
Variable notification system
Variable condition or quality changes
  • Data quality monitoring
  • Bad data detection
  • Variable quality changes from Good to Uncertain
  • Stale flag set or cleared
Variable range transition event
Variable notification system
Variable value crosses defined range boundaries
  • Range-based monitoring
  • Zone detection
  • Temperature enters warning zone
  • Temperature exits safe zone
Variable transition event
Variable notification system
Variable makes significant state or value transition
  • State change tracking
  • Transition monitoring
  • Pump status transitions from Off to On
  • Mode changes from Automatic to Manual
VariableValueChanged Event
IVariable
Any variable value changes (internal core event)
  • Internal event routing
  • Alarm triggering
  • Data logging
  • Real-time monitoring
  • Temperature variable updates
  • Pump speed changes
Log Event
EventLoggerBehavior
Event logged to persistent storage
  • Event persistence
  • Audit trail creation
  • Historical record
  • Alarm event logged to database
  • User action recorded
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