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OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions4.8 Alarmsconcepts of an Active state and other states like Shelving state and Suppressed state to a Condition . The state model is illustrated in Figure 5 . The complete model with ... shelving state can be set by an Operator via OPC UA Methods . The suppressed state is set internally by the Server due to system specific reasons. Alarm systems typically implement
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OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions5.8.2 AlarmConditionTypelevel Alarm for a tank that is currently not in use might be suppressed. Recommended state names are described in A.1 . In the event of a restart of an AlarmManager ... AlarmManager should recover the SuppressedState . If the system cannot determine if the alarm is Suppressed , the state shall be set to false (not Suppressed ). OutOfServiceState is used by maintenance personnel