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• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.2 AlarmConditionType
  HasProperty Variable OnDelay Duration PropertyType Optional HasProperty Variable OffDelay Duration PropertyType Optional HasComponent Variable FirstInGroupFlag Boolean BaseDataVariableType Optional HasComponent Object FirstInGroup AlarmGroupType Optional HasComponent Variable LatchedState LocalizedText TwoStateVariableType Optional HasAlarmSuppressionGroup ... inactive zone for OffDelay it 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