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• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.22.2 DataChangeFilter
  DataChangeFilter The DataChangeFilter defines the conditions under which a DataChange Notification should be reported and, optionally, a range or band for value changes where no DataChange Notification is generated. This ... only to Variable s with any Number data type. An exception that causes a DataChange Notification based on an AbsoluteDeadband is determined as follows: Generate a Notification if (absolute value