Skip to main content

browsing a node

You can browse a node by specifying the msg.nodeId or msg.topic attribute in the Browse node.

The node will return the list of references of the node in msg.payload.

Properties​

  • Name: The name of this node.
  • Endpoint: The predefined endpoint of the OPC UA server to connect to.
  • NodeId: The OPC UA Node ID for which you want to explore the references.
  • ReferenceTypeId: The type of reference you want to follow, selected in the ReferenceType hierarchy.
  • IncludeSubType: A flag that indicates whether to strictly follow (when false) the reference type specified by ReferenceTypeId or also consider any subtype of the ReferenceTypeId (when true).
  • BrowseDirection: indicates whever to follow forward or backward references or both.
  • Node Class Mask: allows to filter which type of target node to consider based on NodeClass. Only target nodes with the selected NodeClasses are returned.
    • Object
    • Variable
    • Method
    • ObjectType
    • VariableType
    • ReferenceType
    • DataType
    • View
  • Result Mask: Specifies the fields in the ReferenceDescription structure that should be returned.
    • ReferenceType
    • IsForward
    • NodeClass
    • BrowseName
    • DisplayName
    • TypeDefinition
    • (NodeId is always provided)

input message formats​

basic Browse message​

msg = {
    nodeId: "ns=2;s=ProcessController", // Node to browse
}

or

msg = {
    topic: "ns=2;s=ProcessController"    // Alternative way to specify the
    // target node
}

Browse with specific reference type​

msg = {
    nodeId: "ns=2;s=ProcessController",
    referenceTypeId: "HasComponent" // Specify reference type to filter results
}