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OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & ConditionsAnnex C Mapping to EEMUA (Informative)occurred. Release OneShotShelving A 'release' is a facility that can be applied to a standing (UA = active) Alarm in a similar way to which Shelving is applied. A released Alarm ... will be removed from the list and will not re-annunciate until un-shelved. Standing Active = True An Alarm is Standing whilst the Condition persists ( Raised and Standing are often