Use Case

List Topology

Description

The OPC UA client shows the topology in a hierarchical tree to the user. The tree is provided by an OPC UA server for FDT OPC Information Model.

If the OPC UA server supports a network topology, it is provided according to the 'Device Integration Host Model' defined in OPC UA DI.

Stakeholder

Preconditions

Topology is available in OPC UA Server

Post conditions

User can see the topology in a hierarchy

Actors

Engineer, Expert, Observer

Trigger

Whenever a user needs a list of devices for further access

Frequency

Description

Step

Action

1

User triggers connect from OPC Client to OPC Server

2

User starts browsing from node 2:DeviceTopology

3

OPC Client displays the topology to the user

Exceptions

Requirements

User has access permissions to the server

Notes

Network/communication topology

Physical topology

Open Issues