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Unified Architecture

Access data on OPC UA servers

OPC Toolbox™ provides an OPC UA client to connect to OPC UA servers. Using the client, you connect to the server, query server status, browse the server namespace, read and write current values, and read historical values from nodes on the server. Historical data is retrieved as OPC data objects, which allow you to process historical data in preparation for common analysis tasks.


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opcuaserverinfo (opcua)Query host for installed OPC UA servers
opcua (opcua)Create OPC UA client object
setSecurityModel (opcua)Set security configuration parameters for OPC UA client
connect (opcua)Connect OPC UA client to server
disconnect (opcua)Disconnect OPC UA client from server
isConnected (opcua)Determine if OPC UA client object is connected to server
getServerStatus (opcua)Status of OPC UA server
findDescription (opcua)Find OPC UA servers containing specified description
exportClientCertificate (opcua)Copy OPC UA client application certificates to file
opcuanode (opcua)Create OPC UA node objects
getNamespace (opcua)Namespace of OPC UA server associated with client
browseNamespace (opcua)Graphically browse name space and select nodes from OPC UA server
readValue (opcua)Read values from nodes on OPC UA server
writeValue (opcua)Write values to nodes on OPC UA server
readHistory (opcua)Read historical data from nodes on OPC UA server
readAtTime (opcua)Read historical data from nodes of OPC UA server at specific times
readProcessed (opcua)Read aggregate data from nodes of an OPC UA server
findNodeByName (opcua)Find OPC UA server nodes by name
findNodeById (opcua)Find OPC UA server nodes by namespace index and identifier
isEmptyNode (opcua)True for empty nodes of OPC UA node array
isVariableType (opcua)True for variable nodes of OPC UA server
isObjectType (opcua)True for object nodes of OPC UA server
getNodeAttributes (opcua)Read OPC UA server node attributes
getAllChildren (opcua)Recursively retrieve all children of OPC UA server node


About OPC Unified Architecture

The OPC Unified Architecture (OPC UA) standard combines all the capabilities of OPC Data Access and OPC Historical Data Access standards (together, referred to as "OPC Classic") and adds various additional capabilities into a single, extensible standard.

OPC UA Components

Description of OPC UA components and their interactions.

OPC UA Security

Establish secure, authenticated connections between OPC UA servers and clients.

OPC UA Certificate Management

Manage keys for secure connections between OPC UA servers and clients.

OPC UA Server Data Types

Descriptions of OPC UA data values.

OPC UA Aggregate Functions

OPC UA node aggregate function ID enumeration.

Access Data from OPC UA Servers

Create an OPC UA application by retrieving current and historical data.

Featured Examples