Unified Architecture

Access data on OPC UA servers

Industrial Communication 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.

Blocks

OPC UA Read	Read data from OPC UA server (Since R2024a)
OPC UA Write	Write data to OPC UA server (Since R2024a)

Functions

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Server Connection

`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 (Since R2020a)
`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 (Since R2020a)

Namespace Browsing

`opcuanode (opcua)`	Create OPC UA node objects
`getNamespace (opcua)`	Namespace of OPC UA server associated with client
`browseNamespace (opcua)`	Graphically browse namespace and select nodes from OPC UA server

Read and Write

`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
`invoke (opcua)`	Execute method node on OPC UA server (Since R2024a)

Node Information

`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

Node Subscription

`subscribe`	Monitor nodes for data change notification (Since R2023b)
`addnode`	Add nodes to existing client subscription (Since R2023b)
`removenode`	Remove nodes from client subscription (Since R2023b)

Topics

About OPC Unified Architecture
Learn about the OPC UA standard platform.
OPC UA Components
Learn about 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
Learn about types of OPC UA data values.
OPC UA Aggregate Functions
Retrieve OPC UA historical data as an aggregate of a function.
Access Data from OPC UA Servers
Create an OPC UA application by retrieving current and historical data.
Configure OPC UA Client in Simulink
Configure OPC UA clients for model.

Featured Examples

Browse OPC UA Server Namespace

Find OPC Unified Architecture (UA) servers, connect to them, and browse their namespace to find nodes of interest.

Open Script

Read and Write Current OPC UA Server Data

Read and write data to an OPC UA server.

Open Script

Read Historical OPC UA Server Data

Read historical data from an OPC UA server.

Open Script

Visualize and Preprocess OPC UA Data

Work with OPC UA Data objects.

Open Script

Subscribe OPC UA Nodes for Data Change

Use an OPC UA client to subscribe to a set of nodes with a callback function.

Open Live Script

Call Method Nodes from OPC UA Client

Call method nodes from an OPC UA client to control various aspects of plant operations in a simple factory scenario.

Open Live Script

Get Started with OPC UA in Simulink

Read and write data to nodes available on an OPC Unified Architecture (UA) server using Simulink® blocks from Industrial Communication Toolbox™. You can connect to the server using a Simulink model that acts as an OPC UA client. You can perform read and write operations in the model using the OPC UA Read and OPC UA Write blocks.

Open Live Script

Use OPC UA Data to Test Binary Distillation Column Plant Model

Use data from an OPC UA server to test composition control of a binary distillation column model.

Open Live Script

Monitor Data Value and Quality of OPC UA Nodes in Simulink

Implement a dashboard showing instantaneous values and quality metrics related to specific OPC Unified Architecture (UA) nodes using Simulink® blocks from Industrial Communication Toolbox™.

Open Live Script