Access project nodes

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.

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;

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:

LogicObject Variable: direct access to the NetLogic object
Variable Owner: direct access to the NetLogic parent object
Variable Session: directly access the session alias
Return known nodes
Return nodes by searching

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);