Server which is currently sourcing information
permitted range for value changes that will not trigger a data change Notification
Note 1to entry: Deadbandcan be applied as a filter when subscribing to Variablesand is used to keep noisy signals from updating the Clientunnecessarily. This standard defines AbsoluteDeadbandas a common filter. OPC 10000-8defines an additionalDeadband filter.
Server that is not operational.
act of switching the source or target of information.
Note 1to entry: In OPC UA redundant systems, a failover is the act of a Client switching away from a failed or degraded Server to another Server in the redundant set (Server failover). In some cases a Client may have no knowledge of a failover action occurring (transparent redundancy). The act of an alternate Client replacing an existing failed or degraded Client connection to a Server(Client failover).
unique identifier for a machine on a network
identifier for a cryptographic key set
digital certificate for a software product that can be installed on several hosts to describe the capabilities of the software product
Note 1to entry: Different installations of one software product could have the same software certificate. Software certificates are not relevant for security. They are used to identify a software product and its supported features. SoftwareCertificates are described in 6.4.
the presence of duplicate components enabling the continued operation after a failure of an OPC UA component
two or more Serversthat are redundant with each other