OPC Toolbox

OPC Data Access Object

When used in MATLAB, the toolbox employs an intuitive, hierarchical object structure to help you manage connections to OPC servers and collections of server items, or tags. You create an OPC Data Access Client object to connect to an OPC server. This connection lets you browse the server namespace and retrieve properties of each item stored on the server. You create Data Access Group objects to control sets of Data Access Item objects, which represent server items. The toolbox lets you configure and control all client, group, and item objects by modifying their properties.

OPC Tool, which lets you browse the server namespace, configure objects, and read and write OPC DA data. The tool also lets you log OPC DA data into MATLAB for analysis and plotting.

In Simulink, the toolbox uses a Configuration block to specify the OPC Data Access clients to use in the model, define the behavior for OPC errors and events, and set the real-time behavior. During simulation, the model executes in pseudo real time, matching the system clock as closely as possible by automatically slowing the simulation. You can use the Configuration block to define the toolbox’s behavior if the simulation runs more slowly than the system clock.

The OPC Configuration block for Simulink, which lets you specify and configure settings for your OPC DA clients in your Simulink model.