Use Case

Get Device Diagnostic Information

Description

A software or user requests diagnostic information (context specific diagnostic information) from a physical device. The OPC UA client collects this information by reading device diagnostic information provided according to the OPC UA DI information model.

Stakeholder

Used by

Preconditions

Device node is available in OPC UA Server

Device is connected to the OPC UA Server (means online or only somehow accessible?)

Use case B.2 (List Topology)

Post conditions

Maintenance or asset manager can derive actions

Actors

Engineer, Expert, Observer, Maintenance Manager, Asset Manager, Operator

Trigger

Status of device is not Good. This information is provided by: Use case B5 or by alarms

Frequency

Description

Step

Action

1

OPC Client User opens UI of the device

2

User requests diagnostic data of the device

3

OPC client requests diagnostic data of the device from the OPC server

4

OPC server gets diagnostic data from the DTM

5

OPC server sends the diagnostic data to the client, displaying the data on the UI

Exceptions

Requirements

Notes

According to FDT2.0 the expectation is, that the DTM provides the parameters for device specific diagnostic within one group of parameters.

Open Issues