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• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.17.1 Overview
  illustrated in Figure 17 . The state model supports two types of Shelving : OneShotShelving and TimedShelving . They are illustrated in Figure 16 . The illustration includes the allowed transitions between the various ... When the tank starts operation again the Shelving state will automatically clear. In TimedShelving , a user specifies that an Alarm be shelved for a fixed time period. This type