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

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

5.4.1 General

includes extending TwoStateVariableType state machines with sub states and the addition of Alarm grouping. TwoStateVariableTypes can be extended with subordinate state machines in a similar fashion to the StateMachineType defined