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11 result(s) for Server,

• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  2.1.43 Subscription
  Subscription Client -defined endpoint in the Server, used to return Notifications to the Client Note 1 to entry:  Subscription is a generic term that describes a set of Nodes selected ... Client (1) that the Server periodically monitors for the existence of some condition, and (2) for which the Server sends Notifications to the Client when the condition is detected
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  4.3.2.2 Message flooding
  Message flooding For Client - Server , an attacker can send a large volume of Message s, or a single Message that contains a large number of requests, with the goal ... overwhelming the OPC UA Server or dependent components such as CPU, TCP/IP stack, operating system, or the file system. Flooding attacks can be conducted at multiple layers including
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.2.3.1 Client behaviour
  Client the transparent RedundantServerSet appears as if it is just a single Server and the Client has no Failover actions to perform. All Servers in the RedundantServerSet have an identical ... allow Clients to identify which Servers are in the RedundantServerSet , the ServiceLevel of each Server, and which Server is currently responsible for the Client Session . This information is specified
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.2.4.5.3 Warm
  ServiceLevel . A Client can connect and create Subscriptions and MonitoredItems on more than one Server, but sampling and publishing can only be active on one Server . However, the active Server ... MonitoredItems in the Publish response such as Bad_NoCommunication. The one Active Server can be found by reading the ServiceLevel Variable from all Servers . The Server with the highest ServiceLevel
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  6.7.7 Verifying Message Security
  Message verification the receiver shall close the communication channel. If the receiver is the Server, it shall also send a transport error Message before closing the channel. Once the channel ... SecurityPolicy shall be the same as the one specified in the request. In the Server, the SecurityPolicy shall be the same as the one used to originally create the SecureChannel
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.10.3 AuditConditionEnableEventType
  result of a Method call, but due to an internal action of the Server, the SourceName shall reflect Enable or Disable, it may be preceded by an appropriate description such
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  4.3.2 Simple Discovery with a DiscoveryUrl
  Simple Discovery with a DiscoveryUrl Every Server has one or more DiscoveryUrls that allow access to its Endpoints . Once a Client obtains (e.g. via manual entry into a form ... DiscoveryUrl for the Server, it reads the EndpointDescriptions using the GetEndpoints Service defined in OPC 10000-4 . The discovery process for this scenario is illustrated in Figure 2 . Figure
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  9.1 Overview
  Overview AuthorizationServices provide AccessTokens to Clients that may use them to access resources. A Server, such as a GDS , with AuthorizationService Capabilities may support one or more AuthorizationService Objects ... this scenario, the mapping rules assigned to the Roles known to the Server are used to populate an AccessToken with the Roles associated with the UserIdentity provided when the Client
• OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information Model
  8.3 AuditConnectionCleanupEventType
  AuditConnectionCleanupEventType This EventType allows Connection clean-up, as performed by a Server, to be audited. Its representation in the AddressSpace is formally defined in Table 110 . Table 110 - AuditConnectionCleanupEventType definition
• OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information Model
  14.2 Handling of OPC UA namespaces
  document. Table 257 provides a list of mandatory and optional namespaces used in a Server supporting OPC UA FX. Table 257 - Namespaces used in a UAFX Server NamespaceURI Description ... specification. This namespace shall have the namespace index 0. Mandatory Local Server URI Namespace for nodes defined in the local server. This may include types and instances used
• OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information Model
  E.6.6 Loading / Saving ConnectionConfigurationSets
  NamespaceArray that contains the URI that describes the owner of the Node . On a Server, this NamespaceArray is in the Server Object and is used to resolve all nodes ... Server . But in this case, the PublishedDataSet or SubscribedDataSet describes Variables that are on the Publisher or Subscriber Server , which is very likely to be a different Server . Depending