Data Reading and Writing

Read and write OPC server data synchronously or asynchronously

Exchange data with the OPC server using individual items, or using the dagroup object to perform the operation on multiple items. The reading and writing operation can be performed synchronously, so that your MATLAB^® session waits for the operation to complete, or asynchronously, allowing your MATLAB session to continue processing while the operation takes place in the background.

Functions

`read`	Read data synchronously from OPC DA groups or items
`readasync`	Read data asynchronously from group or items
`write`	Write values to group or items
`writeasync`	Asynchronously write values to group or items
`cancelasync`	Cancel asynchronous read and write operations

Properties

opcda Object Properties	Configure OPC DA client
dagroup Object Properties	Configure OPC `dagroup` object
daitem Object Properties	Configure OPC `daitem` object

Topics

Read and Write Data on OPC DA Server
Use group and item objects to read and write data on an OPC DA server synchronously and asynchronously.
Work with Structure-Formatted Data
Learn about the structure format of OPC data in the toolbox.
OPC Data: Value, Quality, and TimeStamp
Learn about the Value, Quality, and TimeStamp elements that make up OPC data.
Array-Formatted Data
Use array formats returned by the toolbox.
Work with Different Data Types
Learn how the toolbox handles MATLAB data types and OPC server data types.

Featured Examples

Acquire Data from an OPC Data Access Server

Use Industrial Communication Toolbox™ to acquire data from an OPC server.

Open Script

Read and Write Data to an OPC Data Access Server

Use synchronous read and write operations to exchange data with an OPC server.

Open Script

Log Data from an OPC Data Access Server

Configure and execute a logging session, and retrieve data from that logging session.

Open Script