Browse Nodes

Synopsis

This operator list all nodes that belong to a given OPC-UA node ID.

Description

给定一个特定nodeID,这个操作符turns all child OPC-UA nodes that belong to this node. Typically these are sub-nodes of a system, for example multiple sensors attached to a machine.

The operator can also start browsing from the root node and list all available nodes on a server. As the structure of larger systems can get quite complex with many nodes, this operation can take some or might be blocked by the server. This operator is a good starting pont to explore available nodes on an OPC-UA server.

Input

connection

Connection object specifying the connection to the OPC-UA server.

Output

output

ExampleSet that contains the list of the sub-nodes of the given node. It contains the name of the node, the namespace and nodeID and if selected also the value type stored in the node.

Parameters

Start from root node

If selected, the operator will start browsing the OPC-UA server from the root node and will list all available nodes on the server. On live production systems with many nodes this operation can take quite a while and might actually be timed-out from the server.

Namespace id

The ID of the namespace of the node from where the browsing will start.

Node identifier

The ID of the node from the where the browsing will start. This only works for numeric node IDs.

Node id as string

If selected the node identifier can be provided in the common OPC-UA format for example: "ns=0;i=1000". Possible options for the node identifier are: "i=" followed by a numeric identifier or "s=" followed by a string.

Node type

If selected the value type of the node is returned in an extra column.