Access project nodes

You can access C# object members, OPC UA nodes, NetLogic objects, and session aliases.

C# object members

In C#, each property or method contained in an object is generically defined as a member of the object. The matching project node BrowseName identifies each member.

Tip: To display the BrowseName of a property, hover over its name in the Property pane. A tooltip appears with the BrowseName, data type, and short description (if present).

To access the members in hierarchical order, use the point.

In the following example, The Acceleration property of the Motor object is set to the value of 123.

Motor.Acceleration = 123;

In the following example, the value of the Motor object Speed property is assigned to the value of the currentSpeed C# integer variable.

int currentSpeed = Motor.Speed;

Project OPC UA nodes

To access a node in the C# information model, the node must be represented in the NetLogic by a matching C# object. To obtain the matching C# object, you can use these APIs:

To refer to the OPC UA nodes of the properties of a typed node, the name of the matching C# property consists of the BrowseName of the property to which the Variable suffix is added. The following example shows a dynamic link set on the Text property of a label through the API, accessing the property node represented by TextVariable.

Label1.TextVariable.SetDynamicLink(speedValue);