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• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.2 AlarmConditionType
  HasProperty Variable OffDelay Duration PropertyType Optional HasComponent Variable FirstInGroupFlag Boolean BaseDataVariableType Optional HasComponent Object FirstInGroup AlarmGroupType Optional HasComponent Variable LatchedState LocalizedText TwoStateVariableType Optional HasAlarmSuppressionGroup Object <AlarmGroup> AlarmGroupType OptionalPlaceholder ... will then become inactive. The optional variable FirstInGroupFlag is used together with the FirstInGroup object. The FirstInGroup Object is an instance of an AlarmGroupType that groups a number of related