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• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  2.1.39 Service
  Service Client -callable operation in a Server Note 1 to entry:  Services are defined in OPC 10000-4 . A Service is similar to a method call in a programming language
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  2.1.18 Message
  Message data unit conveyed between Client and Server that represents a specific Service request or response
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  2.1.41 Session
  Client and a Server. Note 1 to entry: A Session maintains state information between Service calls from the Client to the Server
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.2 OPC UA Clients
  Client architecture The Client Application utilizes a Client API to initiate OPC UA Service requests and receive responses from Servers . The Communication Stack handles the conversion of Client API calls
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.3.4.3 AddressSpace Views
  makes visible to the Client , thus restricting the size of the AddressSpace for the Service requests submitted by the Client . The default View is the entire AddressSpace . Servers may optionally
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.3.6.2 Request/response Services
  Request/response Services Request/response Services are Services invoked by the Client through the OPC UA Service Interface to perform a specific task on one or more Node s in the AddressSpace
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.3.6.3 Subscription Services
  Subscription Services The Publish Service is invoked through the OPC UA Service Interface for the purpose of periodically sending Notifications to Clients . Notifications include Events , Alarms , data changes and Program
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.4 Redundancy
  support client-controlled load balancing. The health of a Server including its ability to Service requests is collectively defined as ServiceLevel . See OPC 10000-5 for a formal definition
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  6.2 Discovery Service Set
  Discovery Service Set This Service Set defines Services used to discover Servers that are available in a system. It also provides a manner in which clients can read the security
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  6.3 SecureChannel Service Set
  SecureChannel Service Set This Service Set defines Services used to open a communication channel that ensures the confidentiality and integrity of all Messages exchanged with the Server . The base concepts ... security policies for a Server . These policies are exposed via the Discovery Service Set . A Client selects the appropriate endpoint that supports the desired security policy by the Server when
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  3.1.18 Claim
  Claim statement in an AccessToken that asserts information about the subject which the Authorization Service knows to be true Note 1 to entry: Claims can include username, email, and Roles
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  3.1.43 SecurityKeyService
  SecurityKeyService Server that accepts AccessTokens issued by the Authorization Service and returns security keys that can be used to access the specified Resource Note 1 to entry: The keys
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  4.5.2.5 Session-less Service invocation
  Session-less Service invocation OPC UA provides a session-less Service invocation (defined in OPC 10000-4 overview and see OPC 10000-6 for details). The session-less communication provides
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  5.1.9 Session hijacking
  assigning a security context (i.e. SecureChannel ) with each Session as specified in the CreateSession Service in OPC 10000-4 . Hijacking a Session would thus first require compromising the security context
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  6.20 Changing Users in OPC UA
  Changing Users in OPC UA OPC UA via the ActivateSession Service allows a Client to change the user that is involved with the Session . This Service can have security related ... when an ActivateSession request is received by a Server , it should stop processing new Service calls until the Server has completed any user change. For Services like Read or Browse
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  8.3 Threats against a GDS
  Threats against a GDS As described in Part 4, the FindServersOnNetwork Service can be used without security and is therefore vulnerable to denial of service (DOS) attacks. A Discovery Server ... should minimize the amount of processing required to send the response for this Service . This can be achieved by preparing the result in advance. The GDS only accepts Server registrations
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.6.4 Instantiation of complex TypeDefinitionNodes
  always keep the same BrowseName as the InstanceDeclaration they are derived from. A special Service defined in OPC 10000-4 called TranslateBrowsePathsToNodeIds may be used to identify the instances based ... InstanceDeclarations . Using the simple Browse Service might not be sufficient since the uniqueness of the BrowseName is only required for TypeDefinitionNodes and InstanceDeclarations , not for other instances. Thus
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.8 Methods
  result is returned. NOTE The owning Object or ObjectType is specified in the service call when invoking the Method . While Methods may affect the state of the owning Object , they ... Method's arguments and describes its behaviour. Methods are invoked by using the Call Service defined in OPC 10000-4 . Clients discover the Methods supported by a Server by browsing
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.9.1 Overview
  callers with appropriate permissions. When a Session is created, or a Session-less Service is called, the Server must determine what Roles are granted to that Session or Session-less ... Service invocation. This specification defines standard mapping rules which Servers may support. Servers may also use vendor specific mapping rules in addition to or instead of the standard rules
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.10.2 Interface Model
  handled as if they were defined by the TypeDefinitionNode . For example, the TranslateBrowsePathsToNodeIds Service shall return them first. If several Interfaces should be applied to the Object , they should ... detect the implementation of Interfaces by filtering for the HasInterface Reference into the Browse Service request. On instances, the Browse Service will return elements derived from an Interface together with
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.10.3 AddIn model
  implementation of AddIns by passing the HasAddIn Reference as filter to the Browse Service request. If an AddIn has a default BrowseName, Clients can use the TranslateBrowsePathsToNodeId Service with
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.2.4 BrowseName
  readable name when browsing the AddressSpace to create paths out of BrowseNames . The TranslateBrowsePathsToNodeIds Service defined in OPC 10000-4 can be used to follow a path constructed of BrowseNames ... Clients shall consider them case sensitive. Servers are allowed to handle BrowseNames passed in Service requests as case insensitive. Examples are the TranslateBrowsePathsToNodeIds Service or Event filter. If a Server
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.5.4 Client-side creation of Objects of an ObjectType
  HasTypeDefinition Reference pointing to its ObjectType . Clients can create Objects using the AddNodes Service defined in OPC 10000-4 . The Service requires specifying the TypeDefinitionNode of the Object . An Object ... created by the AddNodes Service contains all components defined by its ObjectType dependent on the ModellingRules specified for the components. However, the Server may add additional components and References
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.6.6 Client-side creation of Variables of an VariableType
  HasTypeDefinition Reference pointing to its VariableType . Clients can create Variables using the AddNodes Service defined in OPC 10000-4 . The Service requires specifying the TypeDefinitionNode of the Variable . A Variable ... created by the AddNodes Service contains all components defined by its VariableType dependent on the ModellingRules specified for the components. However, the Server may add additional components and References
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.7.1 Method NodeClass
  Method NodeClass Methods define callable functions. Methods are invoked using the Call Service defined in OPC 10000-4 . Method invocations are not represented in the AddressSpace . Method invocations always ... then the NodeId of one of those Nodes shall be put into the Call Service defined in OPC 10000-4 as parameter to detect the context of the Method operation
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.2 Creating an Instance
  BrowsePath of the child Node s based on the TypeDefinitionNode to the TranslateBrowsePathsToNodeIds service (see OPC 10000-4 ). This Service returns the NodeId for each of the child Node
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.4.4.5 MandatoryPlaceholder
  does not require a specific BrowseName and thus cannot be used for the TranslateBrowsePathsToNodeIds Service (see OPC 10000-4 ). When the InstanceDeclaration is complex, i.e. it references other InstanceDeclarations with
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  7.9 HasOrderedComponent ReferenceType
  References of this type or its subtype all References are returned in the Browse Service defined in OPC 10000-4 in a well-defined order. The order is Server -specific
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.56 AccessRestrictionType
  SessionRequired 2 The Client cannot access the Node when using SessionlessInvoke Service invocation. ApplyRestrictionsToBrowse 3 If this bit is set, the access restrictions SigningRequired and EncryptionRequired are also applied
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.8 AuditOpenSecureChannelEventType
  subtype of AuditChannelEventType and is used for Events generated from calling the OpenSecureChannel Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.10 AuditCreateSessionEventType
  subtype of AuditSessionEventType and is used for Events generated from calling the CreateSession Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.11 AuditUrlMismatchEventType
  subtype of AuditCreateSessionEventType and is used for Events generated from calling the CreateSession Service defined in OPC 10000-4 if the EndpointUrl used in the service call does not match
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.12 AuditActivateSessionEventType
  subtype of AuditSessionEventType and is used for Events generated from calling the ActivateSession Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.13 AuditCancelEventType
  subtype of AuditSessionEventType and is used for Events generated from calling the Cancel Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.22 AuditAddNodesEventType
  subtype of AuditNodeManagementEventType and is used for Events generated from calling the AddNodes Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.23 AuditDeleteNodesEventType
  subtype of AuditNodeManagementEventType and is used for Events generated from calling the DeleteNodes Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.24 AuditAddReferencesEventType
  subtype of AuditNodeManagementEventType and is used for Events generated from calling the AddReferences Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.25 AuditDeleteReferencesEventType
  subtype of AuditNodeManagementEventType and is used for Events generated from calling the DeleteReferences Service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  A.3 ObjectTypes
  this knowledge to program against the ObjectType structure and use the TranslateBrowsePathsToNodeIds Service defined in OPC 10000-4 on the instances. Simple objects only having one value (e.g. a simple
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  A.4.2 Properties or DataVariables
  type definition should be made available so the Client can use the AddNodes Service defined in OPC 10000-4 to create new instances of the type definition
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  3.3 Conventions for Service definitions
  Conventions for Service definitions OPC UA Services contain parameters that are conveyed between the Client and the Server . The OPC UA Service specifications use tables to describe Service parameters ... Parameters are organized in this table into request parameters and response parameters. Table 1 - Service definition table Name Type Description Request Defines the request parameters of the Service Simple Parameter
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  4.1 Service Set model
  Service Set model This clause specifies the OPC UA Services . The OPC UA Service definitions are abstract descriptions and do not represent a specification for implementation. The mapping between ... from these Services are defined in OPC 10000-6 . These Services are organized into Service Sets . Each Service Set defines a set of related Services . The organization in Service Sets
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  4.2 Request/response Service procedures
  Request/response Service procedures Request/response Service procedures describe the processing of requests received by the Server , and the subsequent return of responses. The procedures begin with the requesting Client submitting ... Service request Message to the Server . Upon receipt of the request, the Server processes the Message in two steps. In the first step, it attempts to decode and locate
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.1 General
  General This clause defines the OPC UA Service Sets and their Services . Clause 7 contains the definitions of common parameters used by these Services . Subclause 6.5 describes auditing requirements ... services. Whether or not a Server supports a Service Set , or a Service within a Service Set , is defined by its Profile . Profiles are described
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.2 Service request and response header
  Service request and response header Each Service request has a RequestHeader and each Service response has a ResponseHeader . The RequestHeader structure is defined in 7.32 and contains common request parameters
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.3 Service results
  Service results Service results are returned at two levels in OPC UA responses, one that indicates the status of the Service call, and the other that indicates the status ... each operation requested by the Service . Service results are defined via the StatusCode (see 7.38 ). The status of the Service call is represented by the serviceResult contained in the ResponseHeader
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.1 Overview
  Overview This Service Set defines Services used to discover the Endpoints implemented by a Server and to read the security configuration for those Endpoints . The Discovery Services are implemented ... Clients read the security information necessary to establish a SecureChannel by calling the GetEndpoints Service on the DiscoveryEndpoint . In addition, Servers may register themselves with a well-known Discovery Server
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.2.1 Description
  Description This Service returns the Servers known to a Server or Discovery Server . The behaviour of Discovery Servers is described in detail in OPC 10000-12 . The Client may reduce ... Servers match the criteria specified by the Client . The filter criteria supported by this Service are described in 5.5.2.2 . Every Server shall provide a DiscoveryEndpoint that supports this Service
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.2.2 Parameters
  Parameters Table 3 defines the parameters for the Service . Table 3 - FindServers Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The authenticationToken ... locales specified. See locale negotiation in 5.4 which applies to this Service . serverUris [] String List of Servers to return. All known Servers are returned if the list is empty
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.3.1 Description
  Description This Service returns the Servers known to a Discovery Server . Unlike FindServers , this Service is only implemented by Discovery Servers . The Client may reduce the number of results returned ... list is returned if no Server matches the criteria specified by the Client . This Service shall not require message security but it may require transport layer security. Each time
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.3.2 Parameters
  Parameters Table 4 defines the parameters for the Service . Table 4 - FindServersOnNetwork Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The authenticationToken ... lastCounterResetTime UtcTime The last time the counters were reset. servers[] ServerOnNetwork List of DNS service records that meet criteria specified in the request. This list is empty if no Servers
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.4.1 Description
  Description This Service returns the Endpoints supported by a Server and all of the configuration information required to establish a SecureChannel and a Session . This Service shall not require message ... Endpoints match the criteria specified by the Client . The filter criteria supported by this Service are described in 5.5.4.2 . A Server may support multiple security configurations for the same Endpoint
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.4.2 Parameters
  Parameters Table 5 defines the parameters for the Service . Table 5 - GetEndpoints Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The authenticationToken ... List of locales to use. See locale negotiation in 5.4 which applies to this Service . profileUris [] String List of Transport Profile that the returned Endpoints shall support
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.5.1 Description
  Description This Service is implemented by Discovery Servers . This Service registers a Server with a Discovery Server . This Service will be called by a Server or a separate configuration utility ... Clients will not use this Service . A Server shall establish a SecureChannel with the Discovery Server before calling this Service . The SecureChannel is described in 5.6 . The Administrator
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.5.2 Parameters
  Parameters Table 6 defines the parameters for the Service . Table 6 - RegisterServer Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The type
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.5.3 Service Results
  Service Results Table 7 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 7 - RegisterServer Service Result Codes Symbolic Id Description Bad_InvalidArgument
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.6.1 Description
  Description This Service is implemented by Discovery Servers . This Service allows a Server to register its DiscoveryUrls and capabilities with a Discovery Server . It extends the registration information from RegisterServer ... with information necessary for FindServersOnNetwork . This Service will be called by a Server or a separate configuration utility. Clients will not use this Service . Servers that support RegisterServer2 shall
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.6.2 Parameters
  Parameters Table 8 defines the parameters for the Service . Table 8 - RegisterServer2 Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The type RequestHeader
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.5.6.3 Service results
  Service results Table 9 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 9 - RegisterServer2 Service Result Codes Symbolic Id Description Bad_InvalidArgument
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.1 Overview
  Overview This Service Set defines Services used to open a communication channel that ensures the Confidentiality and Integrity of all Messages exchanged with the Server . The base concepts ... exchange of Messages . In the second step, the OPC UA Applications use the Session Service Set to establish an OPC UA Application Session . Figure 13 - SecureChannel and Session Services Once
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.2.1 Description
  Description This Service is used to open or renew a SecureChannel that can be used to ensure Confidentiality and Integrity for Message exchange during a Session . This Service requires ... algorithms to the Messages as they are sent and received. Specific implementations of this Service for different Communication Stacks are described in OPC 10000-6 . Each SecureChannel has a globally
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.2.2 Parameters
  Parameters Table 11 defines the parameters for the Service . Unlike other Services , the parameters for this Service provide only an abstract definition. The concrete representation on the network depends ... mappings defined in OPC 10000-6 . Table 11 - OpenSecureChannel Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The type RequestHeader is defined
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.2.3 Service results
  Service results Table 12 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 12 - OpenSecureChannel Service Result Codes Symbolic Id Description Bad_SecurityChecksFailed
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.3.1 Description
  Description This Service is used to terminate a SecureChannel . The request Messages shall be signed with the appropriate key associated with the current token for the SecureChannel
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.3.2 Parameters
  Parameters Table 13 defines the parameters for the Service . Specific protocol mappings defined in OPC 10000-6 may choose to omit the response. Table 13 - CloseSecureChannel Service Parameters Name Type
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.3.3 Service results
  Service results Table 14 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 14 - CloseSecureChannel Service Result Codes Symbolic Id Description Bad_SecureChannelIdInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.1 Overview
  Overview This Service Set defines Services for an application layer connection establishment in the context of a Session
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.2.1 Description
  Description This Service is used by an OPC UA Client to create a Session and the Server returns two values which uniquely identify the Session . The first value ... which is used to associate an incoming request with a Session . Before calling this Service , the Client shall create a SecureChannel with the OpenSecureChannel Service to ensure the Integrity
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.2.2 Parameters
  Parameters Table 15 defines the parameters for the Service . Table 15 - CreateSession Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The authenticationToken is always null. The type ... Session should remain open without activity. If the Client fails to issue a Service request within this interval, then the Server shall automatically terminate the Client Session . maxResponse MessageSize UInt32
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.2.3 Service results
  Service results Table 16 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 16 - CreateSession Service Result Codes Symbolic Id Description Bad_SecureChannelIdInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.3.1 Description
  Description This Service is used by the Client to specify the identity of the user associated with the Session . This Service request shall be issued by the Client before ... issues any Service request other than CloseSession after CreateSession . Failure to do so shall cause the Server to close the Session . Whenever the Client calls this Service the Client shall
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.3.2 Parameters
  Parameters Table 17 defines the parameters for the Service . Table 17 - ActivateSession Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters. The type RequestHeader is defined ... locale ids to use. See locale negotiation in 5.4 which applies to this Service. This parameter only needs to be specified during the first call to ActivateSession during a single
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.3.3 Service results
  Service results Table 18 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 18 - ActivateSession Service Result Codes Symbolic Id Description Bad_IdentityTokenInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.4.1 Description
  Description This Service is used to terminate a Session . The Server takes the following actions when it receives a CloseSession request: It stops accepting requests for the Session . All subsequent ... removes the entry for the Client in its SessionDiagnosticsArray Variable . When the CloseSession Service is called before the Session is successfully activated, the Server shall reject the request
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.4.2 Parameters
  Parameters Table 19 defines the parameters for the Service . Table 19 - CloseSession Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). deleteSubscriptions Boolean
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.4.3 Service results
  Service results Table 20 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 20 - CloseSession Service Result Codes Symbolic Id Description Bad_SessionIdInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.5.1 Description
  Description This Service is used to cancel outstanding Service requests. Successfully cancelled service requests shall respond with Bad_RequestCancelledByClient
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.5.2 Parameters
  Parameters Table 21 defines the parameters for the Service . Table 21 - Cancel Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). requestHandle IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.1 Overview
  Overview This Service Set defines Services to add and delete AddressSpace Nodes and References between them. All added Nodes continue to exist in the AddressSpace even if the Client that
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.2.1 Description
  Description This Service is used to add one or more Nodes into the AddressSpace hierarchy. Using this Service , each Node is added as the TargetNode of a HierarchicalReference to ensure
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.2.2 Parameters
  Parameters Table 22 defines the parameters for the Service . Table 22 - AddNodes Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). nodesToAdd [] AddNodesItem
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.2.3 Service results
  Service results Table 23 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 23 - AddNodes Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.2.4 StatusCodes
  defines values for the operation level statusCode parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 24 - AddNodes Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.3.1 Description
  Description This Service is used to add one or more References to one or more Nodes . The NodeClass is an input parameter that is used to validate that the Reference
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.3.2 Parameters
  Parameters Table 25 defines the parameters for the Service . Table 25 - AddReferences Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). referencesToAdd
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.3.3 Service results
  Service results Table 26 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 26 - AddReferences Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.3.4 StatusCodes
  StatusCodes Table 27 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 27 - AddReferences Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.4.1 Description
  Description This Service is used to delete one or more Nodes from the AddressSpace . When any of the Nodes deleted by an invocation of this Service is the TargetNode ... Server specific. When any of the Nodes deleted by an invocation of this Service is being monitored, then a Notification containing the status code Bad_NodeIdUnknown is sent
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.4.2 Parameters
  Parameters Table 28 defines the parameters for the Service . Table 28 - DeleteNodes Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). nodesToDelete
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.4.3 Service results
  Service results Table 29 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 29 - DeleteNodes Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.4.4 StatusCodes
  StatusCodes Table 30 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 30 - DeleteNodes Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.5.1 Description
  Description This Service is used to delete one or more References of a Node . When any of the References deleted by an invocation of this Service are contained ... updated if this Property is supported. Table 31 defines the parameters for the Service . Table 31 - DeleteReferences Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.5.2 Service results
  Service results Table 32 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 32 - DeleteReferences Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.5.3 StatusCodes
  Table 33 defines values for the r esults parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 33 - DeleteReferences Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.1 Overview
  Overview Clients use the browse Services of the View Service Set to navigate through the AddressSpace or through a View which is a subset of the AddressSpace . A View
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.2.1 Description
  Description This Service is used to discover the References of a specified Node. The browse can be further limited by the use of a View . This Browse Service also supports
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.2.2 Parameters
  Parameters Table 34 defines the parameters for the Service . Table 34 - Browse Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). View ViewDescription
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.2.3 Service results
  Service results Table 35 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 35 - Browse Service Result Codes Symbolic Id Description Bad_ViewIdUnknown
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.2.4 StatusCodes
  Table 36 defines values for the r esults parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 36 - Browse Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.3.1 Description
  Description This Service is used to request the next set of Browse or BrowseNext response information that is too large to be sent in a single response. "Too large
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.3.2 Parameters
  Parameters Table 37 defines the parameters for the Service . Table 37 - BrowseNext Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). releaseContinuationPoints
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.3.3 Service results
  Service results Table 38 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 38 - BrowseNext Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.3.4 StatusCodes
  Table 39 defines values for the r esults parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 39 - BrowseNext Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.4.1 Description
  Description This Service is used to request that the Server translates one or more browse paths to NodeIds . Each browse path is constructed of a starting Node and a RelativePath ... based. The RelativePath contains a sequence of ReferenceTypes and BrowseNames . One purpose of this Service is to allow programming against type definitions. Since BrowseNames shall be unique in the context
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.4.2 Parameters
  Parameters Table 40 defines the parameters for the Service . Table 40 - TranslateBrowsePathsToNodeIds Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). browsePaths [] BrowsePath ... complete the operation the Client shall connect to the other Server and call this service again using the target as the startingNode and the unprocessed elements as the relativePath . targetId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.4.3 Service results
  Service results Table 41 defines the Service results specific to this Service . Common StatusCodes are defined in 7.38 . Table 41 - TranslateBrowsePathsToNodeIds Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.4.4 StatusCodes
  defines values for the operation level statusCode parameters that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 42 - TranslateBrowsePathsToNodeIds Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.5.1 Description
  where additional effort is required to establish a connection to these systems. The RegisterNodes Service can be used by Clients to register the Nodes that they know they will access ... response. Structural NodeId errors (size violations, invalid id types) will cause the complete Service to fail. For the purpose of Auditing , Servers shall not use the registered NodeIds but only
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.5.2 Parameters
  Parameters Table 43 defines the parameters for the Service . Table 43 - RegisterNodes Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). nodesToRegister
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.5.3 Service results
  Service results Table 44 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 44 - RegisterNodes Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.6.1 Description
  Description This Service is used to unregister NodeIds that have been obtained via the RegisterNodes service. UnregisterNodes does not validate the NodeIds from the request. Servers shall simply unregister NodeIds
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.6.2 Parameters
  Parameters Table 45 defines the parameters for the Service . Table 45 - UnregisterNodes Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). nodesToUnregister ... NodeId A list of NodeIds that have been obtained via the RegisterNodes service. Response responseHeader Response Header Common response parameters (see 7.33 for ResponseHeader definition
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.6.3 Service results
  Service results Table 46 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 46 - UnregisterNodes Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.1 Overview
  Overview This Service Set provides Services to access Attributes that are part of Nodes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.2.1 Description
  Description This Service is used to read one or more Attributes of one or more Nodes . For constructed Attribute values whose elements are indexed, such as an array, this Service
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.2.2 Parameters
  Parameters Table 47 defines the parameters for the Service . Table 47 - Read Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). maxAge Duration
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.2.3 Service results
  Service results Table 48 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 48 - Read Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.3.1 Description
  Description This Service is used to read historical values or Events of one or more Nodes . For constructed Attribute values whose elements are indexed, such as an array, this Service ... elements of the composite. Servers may make historical values available to Clients using this Service , although the historical values themselves are not visible in the AddressSpace . The AccessLevel Attribute defined
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.3.2 Parameters
  Parameters Table 50 defines the parameters for the Service . Table 50 - HistoryRead Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). historyReadDetails Extensible
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.3.3 Service results
  Service results Table 51 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 51 - HistoryRead Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.3.4 StatusCodes
  defines values for the operation level statusCode parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . History access specific StatusCodes are defined
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.4.1 Description
  Description This Service is used to write values to one or more Attributes of one or more Nodes . For constructed Attribute values whose elements are indexed, such as an array ... this Service allows Clients to write the entire set of indexed values as a composite, to write individual elements or to write ranges of elements of the composite. The values
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.4.2 Parameters
  Parameters Table 53 defines the parameters for the Service . Table 53 - Write Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). nodesToWrite [] WriteValue
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.4.3 Service results
  Service results Table 54 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 54 - Write Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.4.4 StatusCodes
  StatusCodes Table 55 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 55 - Write Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.5.1 Description
  Description This Service is used to update historical values or Events of one or more Nodes . Several request parameters indicate how the Server is to update the historical value
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.5.2 Parameters
  Parameters Table 56 defines the parameters for the Service . Table 56 - HistoryUpdate Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). historyUpdateDetails [] Extensible
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.5.3 Service results
  Service results Table 57 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 57 - HistoryUpdate Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.5.4 StatusCodes
  defines values for the statusCode and operationResults parameters that are specific to this Service . Common StatusCodes are defined in Table 179 . History access specific StatusCodes are defined
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.12.1 Overview
  times for Methods may vary, depending on the function that they perform. The Method Service Set defines the means to invoke Methods . A Method shall be a component
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.12.2.1 Description
  Description This Service is used to call (invoke) a list of Methods . This Service provides for passing input and output arguments to/from a Method . These arguments are defined by Properties ... processing is undefined. If a Client requires sequential processing the Client needs separate Service calls
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.12.2.2 Parameters
  Parameters Table 59 defines the parameters for the Service . Table 59 - Call Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). methodsToCall [] CallMethodRequest
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.12.2.3 Service results
  Service results Table 60 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 60 - Call Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.12.2.4 StatusCodes
  Table 62 defines values for the inputArgumentResults parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Server vendors or OPC UA companion specifications may reuse
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.1.6 Triggering model
  Triggering model The MonitoredItems Service allows the addition of items that are reported only when some other item (the triggering item) triggers. This is done by creating links between
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.2.1 Description
  Description This Service is used to create and add one or more MonitoredItems to a Subscription . A MonitoredItem is deleted automatically by the Server when the Subscription is deleted. Deleting ... effect on the MonitoredItems referenced by the triggered items. Calling the CreateMonitoredItems Service repetitively to add a small number of MonitoredItems each time may adversely affect the performance
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.2.2 Parameters
  Parameters Table 63 defines the parameters for the Service . Table 63 - CreateMonitoredItems Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionId IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.2.3 Service results
  Service results Table 64 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 64 - CreateMonitoredItems Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.2.4 StatusCodes
  defines values for the operation level statusCode parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 65 - CreateMonitoredItems Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.3.1 Description
  Description This Service is used to modify MonitoredItems of a Subscription . Changes to the MonitoredItem settings shall be applied immediately by the Server . They take effect as soon as practical ... diagnostic info setting in the request header of the CreateMonitoredItems or the last ModifyMonitoredItems Service is applied to the Monitored Items and is used as the diagnostic information settings when
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.3.2 Parameters
  Parameters Table 66 defines the parameters for the Service . Table 66 - ModifyMonitoredItems Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionId IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.3.3 Service results
  Service results Table 67 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 67 - ModifyMonitoredItems Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.3.4 StatusCodes
  defines values for the operation level statusCode parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 68 - ModifyMonitoredItems Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.4.1 Description
  Description This Service is used to set the monitoring mode for one or more MonitoredItems of a Subscription . Setting the mode to DISABLED causes all queued Notifications to be deleted
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.4.2 Parameters
  Parameters Table 69 defines the parameters for the Service . Table 69 - SetMonitoringMode Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionId IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.4.3 Service results
  Service results Table 70 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 70 - SetMonitoringMode Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.4.4 StatusCodes
  defines values for the operation level results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 71 - SetMonitoringMode Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.5.1 Description
  Description This Service is used to create and delete triggering links for a triggering item. The triggering item and the items to report shall belong to the same Subscription . Each
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.5.2 Parameters
  Parameters Table 72 defines the parameters for the Service . Table 72 - SetTriggering Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). subscriptionId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.5.3 Service results
  Service results Table 73 defines the Service results specific to this Service . Common StatusCodes are defined in 7.38 . Table 73 - SetTriggering Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.5.4 StatusCodes
  StatusCodes Table 74 defines values for the results parameters that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 74 - SetTriggering Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.6.1 Description
  Description This Service is used to remove one or more MonitoredItems of a Subscription . When a MonitoredItem is deleted, its triggered item links are also deleted. Successful removal
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.6.2 Parameters
  Parameters Table 75 defines the parameters for the Service . Table 75 - DeleteMonitoredItems Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionId IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.6.3 Service results
  Service results Table 76 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 76 - DeleteMonitoredItems Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.6.4 StatusCodes
  StatusCodes Table 77 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 77 - DeleteMonitoredItems Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.1.1 Description
  Client during Subscription creation and may be subsequently modified using the ModifySubscription Service . Similar to Notification processing described in (c) above, if there are no Publish requests queued, the Server ... enabled or disabled by the Client when created, or subsequently using the SetPublishingMode Service . Disabling causes the Subscription to cease sending NotificationMessages to the Client . However, the Subscription continues
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.1.2 State table
  number of times defined for the Subscription lifetime without having received a Subscription Service request from the Client , the Subscription assumes that the Client is no longer present, and terminates ... Table 79 . The following rules and conventions apply. Events represent the receipt of Service requests and the occurrence internal Events , such as timer expirations. Service requests Events may be accompanied
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.1.3 State variables and parameters
  SubscriptionAssignedToSession A boolean value that is set to TRUE only when the Subscription related Service is called with the Session the Subscription is assigned to. A Subscription is assigned ... created it. That assignment can only be changed through successful completion of the TransferSubscriptions Service
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.1.4 Functions
  timeoutHint in the RequestHeader. If the request timed out, send a Bad_Timeout service result for the request and de-queue another publish request. ResetLifetimeCounter() EnqueuePublishingReq() Enqueue the publishing request ... Client when the Subscription is created and may be modified using the ModifySubscription Service . ResetLifetimeCounter() Reset the LifetimeCounter Variable to the value specified for the lifetime of a Subscription
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.2.1 Description
  Description This Service is used to create a Subscription . Subscriptions monitor a set of MonitoredItems for Notifications and return them to the Client in response to Publish requests. Illegal request
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.2.2 Parameters
  Parameters Table 82 defines the parameters for the Service . Table 82 - CreateSubscription Service Parameters Name Type Description Request requestHeader Request Header Common request parameters (see 7.32 for RequestHeader definition). requestedPublishing ... order to allow the Subscription to be transferred to another Session using the TransferSubscriptions service. After Server start-up the generation of subscriptionIds should start from a random IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.2.3 Service results
  Service results Table 83 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 83 - CreateSubscription Service Result Codes Symbolic Id Description Bad_TooManySubscriptions
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.3.1 Description
  Description This Service is used to modify a Subscription . Illegal request values for parameters that can be revised do not generate errors. Instead the Server will choose default values
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.3.2 Parameters
  Parameters Table 84 defines the parameters for the Service . Table 84 - ModifySubscription Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionId IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.3.3 Service results
  Service results Table 85 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 85 - ModifySubscription Service Result Codes Symbolic Id Description Bad_SubscriptionIdInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.4.1 Description
  Description This Service is used to enable sending of Notifications on one or more Subscriptions
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.4.2 Parameters
  Parameters Table 86 defines the parameters for the Service . Table 86 - SetPublishingMode Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). publishingEnabled Boolean
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.4.3 Service results
  Service results Table 87 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 87 - SetPublishingMode Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.4.4 StatusCodes
  StatusCodes Table 88 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 88 - SetPublishingMode Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.5.1 Description
  Description This Service is used for two purposes. First, it is used to acknowledge the receipt of NotificationMessages for one or more Subscriptions . Second, it is used to request ... they may be used by any Subscription . 5.14.1.2 describes the use of the Publish Service . Client strategies for issuing Publish requests may vary depending on the networking delays between
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.5.2 Parameters
  Parameters Table 89 defines the parameters for the Service . Table 89 - Publish Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscription Acknowledgements
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.5.3 Service results
  Service results Table 90 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 90 - Publish Service Result Codes Symbolic Id Description Bad_TooManyPublishRequests
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.5.4 StatusCodes
  StatusCodes Table 91 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 91 - Publish Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.6.1 Description
  Description This Service requests the Subscription to republish a NotificationMessage from its retransmission queue. If the Server does not have the requested Message in its retransmission queue, it returns ... error response. See 5.14.1.2 for the detail description of the behaviour of this Service . See 6.7 for a description of the issues and strategies regarding reconnect handling and Republish
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.6.2 Parameters
  Parameters Table 92 defines the parameters for the Service . Table 92 - Republish Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionId IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.6.3 Service results
  Service results Table 93 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 93 - Republish Service Result Codes Symbolic Id Description Bad_SubscriptionIdInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.7.1 Description
  Description This Service is used to transfer a Subscription and its MonitoredItems from one Session to another. For example, a Client may need to reopen a Session and then transfer
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.7.2 Parameters
  Parameters Table 94 defines the parameters for the Service . Table 94 - TransferSubscriptions Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionIds [] IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.7.3 Service results
  Service results Table 95 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 95 - TransferSubscriptions Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.7.4 StatusCodes
  defines values for the operation level statusCode parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 96 - TransferSubscriptions Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.8.1 Description
  Description This Service is invoked to delete one or more Subscriptions that belong to the Client's Session . Successful completion of this Service causes all MonitoredItems that use the Subscription
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.8.2 Parameters
  Parameters Table 97 defines the parameters for the Service . Table 97 - DeleteSubscriptions Service Parameters Name Type Description Request requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). subscriptionIds [] IntegerId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.8.3 Service results
  Service results Table 98 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 98 - DeleteSubscriptions Service Result Codes Symbolic Id Description Bad_NothingToDo
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.14.8.4 StatusCodes
  StatusCodes Table 99 defines values for the results parameter that are specific to this Service . Common StatusCodes are defined in Table 179 . Table 99 - DeleteSubscriptions Operation Level Result Codes Symbolic
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.1.3 Determining if a Certificate is trusted
  event is in addition to any audit event that was generated for the particular Service that was invoked. The Service audit event in its message text shall include the audit
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.1.4 Creating a SecureChannel
  security risks which a Client shall be aware of when using the GetEndpoints Service . The first could come from a rogue Discovery Server that tries to direct the Client ... protects itself against this by comparing the list of EndpointDescriptions returned from the GetEndpoints Service with list returned in the CreateSession response . The exact mechanisms for using the SecurityToken
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.1.5 Creating a Session
  depends on the user identity token. It could be a Certificate Authority , an Authorization Service or a proprietary database of some sort. The Client and Server shall prove possession
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.3.1 Description
  Description The Session -less Service invocation is introduced for Services, such as Read , Write or Call , that do not require any caller specific state information. It is accessible through ... SessionlessInvoke Service which provides the context information required to call Services without a Session . Session -less invocation is limited to Services of the View Service Set (with exception of RegisterNodes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.3.2 Parameters
  Parameters Table 103 defines the parameters for the Service . Table 103 - SessionlessInvoke Service Parameters Name Type Description Request urisVersion VersionTime The version of the NamespaceArray and the ServerArray used ... Service invocation. The version shall match the value of the UrisVersion Property that defines the version for the URI lists in the NamespaceArray and the ServerArray Properties defined
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.3.3 Service results
  Service results Table 104 defines the Service results specific to this Service . Common StatusCodes are defined in Table 178 . Table 104 - SessionlessInvoke Service Result Codes Symbolic Id Description Bad_VersionTimeInvalid
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.2 General audit logs
  General audit logs Each OPC UA Service request contains a string parameter that is used to carry an audit record id. A Client or any Server operating as a Client
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.4 Auditing for Discovery Service Set
  Auditing for Discovery Service Set This Service Set can be separated into two groups: Services that are called by OPC UA Clients and Services that are invoked ... Services that are called by OPC UA Clients may generate audit entries for failed Service invocations. The RegisterServer Service that is invoked by OPC UA Servers shall generate audit entries
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.6 Auditing for Session Service Set
  Auditing for Session Service Set All Services in this Service Set for Servers that support auditing may generate audit entries and shall generate audit Events for both successful and failed ... Service invocations. These Services shall generate an audit Event of type AuditSessionEventType or a subtype of it. In particular, they shall generate the base EventType or the appropriate subtype, depending
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.7 Auditing for NodeManagement Service Set
  Auditing for NodeManagement Service Set All Services in this Service Set for Servers that support auditing may generate audit entries and shall generate audit Events for both successful and failed ... Service invocations. These Services shall generate an audit Event of type AuditNodeManagementEventType or subtypes of it. See OPC 10000-5 for the detailed assignment of the SourceNode , the SourceName
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.8 Auditing for Attribute Service Set
  Auditing for Attribute Service Set The Write or HistoryUpdate Services in this Service Set for Servers that support auditing may generate audit entries and shall generate audit Events for both ... successful and failed Service invocations. These Services shall generate an audit Event of type AuditUpdateEventType or subtypes of it. In particular, the Write Service shall generate an audit event
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.9 Auditing for Method Service Set
  Auditing for Method Service Set All Services in this Service Set for Servers that support auditing may generate audit entries and shall generate audit Events for both successful and failed ... service invocations if the invocation modifies the AddressSpace , writes a value or modifies the state of the system (alarm acknowledge, batch sequencing or other system changes). These method calls shall
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.5.10 Auditing for View, Query, MonitoredItem and Subscription Service Set
  Auditing for View, Query, MonitoredItem and Subscription Service Set All of the Services in these four Service Sets only provide the Client with information, with the exception of the TransferSubscriptions ... Service in the Subscription Service Set . In general, these services will not generate audit entries or audit Event Messages . The TransferSubscriptions Service shall generate an audit Event of type AuditSessionEventType
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.2.4.5.1 General
  list shall provide the ApplicationDescription for all Servers in the RedundantServerSet through the FindServers Service . This information is needed by the Client to translate the ServerUri into information needed
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.2.4.5.4 Hot
  find the highest ServiceLevel to achieve load balancing; this means that Clients should issue Service requests such as Browse , Read , Write to the Server with the highest ServiceLevel. Subscription related
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.3 Client Redundancy
  Client Redundancy Client Redundancy is supported in OPC UA by the TransferSubscriptions Service and by exposing Client information in the Server diagnostic information. Since Subscription lifetime is not tied