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Scope: Core (OPC-10000-*) All specs

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OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

4.3 Acknowledgeable Conditions

acknowledged or confirmed in a Condition . An AckedState and a ConfirmedState extend the EnabledState defined by the Condition . The state model is illustrated in Figure 2 . The enabled state
OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

5.2 Two-state state machines

instance of TwoStateVariableType contains the current state as a human readable name. The EnabledState for example, might contain the name "Enabled" when True and "Disabled" when ... state of any SubStateMachines in account. As an example, the EffectiveDisplayName of the EnabledState could contain "Active/HighHigh" to specify that the Condition is active and has exceeded
OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

5.5.2 ConditionType

formally defined in Table 8 and Table 9 . The False state of the EnabledState shall not be extended with a sub state machine. Table 8 - ConditionType definition Attribute Value BrowseName ... Mandatory HasProperty Variable Retain Boolean PropertyType Mandatory HasProperty Variable SupportsFilteredRetain Boolean PropertyType HasComponent Variable EnabledState LocalizedText TwoStateVariableType Mandatory HasComponent Variable Quality StatusCode ConditionVariableType Mandatory HasComponent Variable LastSeverity UInt16 ConditionVariableType Mandatory
OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

5.7.2 AcknowledgeableConditionType

names are described in A.1 . The two states are sub-states of the True EnabledState . See 4.3 for more information about acknowledgement and confirmation models. The EventId used
OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions

5.8.2 AlarmConditionType

Properties of the AcknowledgeableConditionType . The following states are sub-states of the True EnabledState . ActiveState/Id when set to True indicates that the situation the Condition is representing currently exists. When