An OPC UA Block object enables reading or writing a set of values. To perform a writing, users must set a new value to the Value property. Reading a Tag is performed automatically by the OPC UA server with a scan time defined on the OPC UA Subscription. The Size property determines the number of Elements of a Tag in a server.
NOTE |
In its current version, E3 only allows mapping one-dimensional arrays to Blocks, although OPC UA standard supports n-dimensional arrays as data types. |
To use this resource, follow these procedures:
1.Right-click an OPC UA Subscription and select the Insert - OPC UA Block option.
Inserting a OPC UA Block
A dialog box opens to indicate how many Blocks must be created on the Subscription, and their names. This name is auto-incremented and, if this option is left blank, those Blocks are created with a default name.
Configuring the number of Blocks
3.A dialog box opens to determine the number of Block Elements in this object. In this option, users can indicate a mapping of all Block Elements or only of a certain interval of Elements.
Configuring an OPC UA Block
4.Inform a Block size and its mapping options.
5.Click OK.
6.If needed, configure this object's properties.
Some properties of an OPC UA Block can be configured using the Properties List, without creating scripts for this. If users want to configure any property, locate it on the Properties List and perform the settings. For more information please check E3 Reference and Scripts Manual.