Write data to OPC DA server
Industrial Communication Toolbox
The OPC Write block writes data to one or more items on an OPC Data Access server. You can choose the write operation to take place synchronously or asynchronously.
Each element of the input vector is written to the corresponding item in the item ID list defined for the OPC Write block.
You must have an OPC Configuration block in your model to use the OPC Write block. You cannot open the OPC Write dialog without first including an OPC Configuration block in the model.
Value — Vector of item values
Values to be written to OPC items. Each element of the input vector is written to a separate item on the OPC DA server.
Import from Workspace — Import block settings from
dagroup object in workspace
The import dialog allows you to import settings for the OPC Write
block from a
dagroup object in the MATLAB base workspace. The client,
item IDs, and sample time are updated based on the properties of the imported
Client — Define OPC client for block
Defines the OPC DA client associated with this block. You can add clients to the list using Configure OPC Clients. For more information, see Use the OPC Client Manager.
Item IDs — List of OPC server items
Shows the items to be written to on the specified server. You can add items to the list using Add Items, or delete items using Delete. You can change the order of the items in the list using Move Up or Move Down. Each element of the vector at input port is written in order to the corresponding item in the list.
Write mode — Set synchronous writing
Synchronous (default) |
Defines the write mode for this block, as
Asynchronous. Synchronous writes are generally more reliable than
asynchronous, but have slightly more overhead.
Sample time — Block sample time
0 (default) | numeric
Defines the sample time for the block. Data is written to the server at the
specified sample time. You can specify
0 for continuous mode, or
-1 to inherit the sample time of the block connected to the input
of the OPC Write block.
Introduced before R2006a