Select Attribute

Select Attribute Property window

You can select the variables or XML variables and set the values to them or read values from them in this property window. To open this window, click the button for the Select Attribute property.

Tag Operation is selected as Read

If the Tag Operation is selected as Read, you can read OPC UA server values into variables or XML variables of the workflow.

On the left-hand side, a variable can be used to store the attribute value. The variable and type can be added from Variables property in Start activity.

Select the attribute from which the read action needs to be performed in the right-hand side. For the 'Read' operation, the OPC Client Browser will be displayed on the right-hand side.

Tag Operation is selected as Write

If the Tag Operation is selected as Write, you can update variables or XML variables of the workflow with OPC UA server values.

For write operation, the OPC Client Browser will be displayed on the left side of the screen. Click this link to populate the OPC Client Browser.

Select the attribute to which the write action needs to be performed in the left hand side. On the right hand side use expression builder or a variable to get value. The variable and type can be added from Variables property in Start activity.