Data selection parameters
- Last UpdatedJun 26, 2025
- 2 minute read
- PI System
- Adapter for OPC UA 1.6
- Adapters
The following parameters are available for configuring an OPC UA data selection:
|
Parameter |
Required |
Type |
Description |
|---|---|---|---|
|
selected |
Optional |
boolean |
Use this field to select or clear a measurement. To select an item, set to true and specify a scheduleId. To remove an item, leave the field empty or set to false. Allowed value: true or false |
|
name |
Optional |
string |
Name of the data item or event type collected from the data source. The default value is null and results in the streamId value being used as a name. |
|
nodeId |
Required for data items |
string |
The nodeId of the variable.Required for data items, mutually exclusive to eventTypeNodeId. Examples: "ns=5;AString"` |
|
streamId |
Optional |
string |
The custom stream Id used to create the streams. If not specified, the adapter generates a default stream Id based on the measurement configuration. The StreamId serves as the unique identifier of a data selection item. A properly configured custom stream Id follows these rules:
|
|
dataFilterId |
Optional |
string |
Enables data filtering for this data selection item if the ID of a data filter is specified. Note: If the specified dataFilterId does not exist, unfiltered data is sent until that dataFilterId is created. |
|
scheduleID |
Optional |
string |
If the scheduleId parameter is specified, then the adapter polls the item for data on the specified schedule. If the scheduleId parameter is not specified, then the adapter subscribes the item for data. Default value: null |
|
eventTypeNodeId |
Required (only for event type configuration) |
string |
Mutually exclusive to NodeId. If specified, indicates Event Type selection. Example: "eventTypeNodeId": "i=2915" |
|
eventSourceNameFilter |
Optional |
string |
A filter to limit the scope of event type to a source. If empty, source will be entire Server. For more details, see Subscribing to Event Notifications. |
|
eventProperties |
Optional |
string |
List of Event fields to egress. If not specified, EventType, Message and Severity will be included. For more details, see Subscribing to Event Notifications. |