OPC UA Subscription Parameters
- Last UpdatedJun 10, 2025
- 1 minute read
The following table details the settings for subscription parameters options:
|
Settings |
Definitions |
|---|---|
|
Max Monitored Items per call [ 100 ] |
Specifies the maximum number of variables in a CreateMonitoredItems() call. |
|
Max Monitored Items per Subscription [ 1000000 ] |
Specifies the maximum number of variables in a subscription. |
|
Max Notifications per Publish [ 0 ] |
Specifies the maximum number of events returned in a publish response. 0 means the server will send its maximum number of events. |
|
Publishing Interval [ms] [ 1000 ] |
Specifies how often an OPC UA client (the connector) requests new data. |
|
Sampling Interval [ms] [ 250 ] |
Specifies how often an OPC UA server polls its underlying system for data. The data is then moved to the MonitoredItem queue. There is a queue for each variable. |
|
Queue Size [ 4 ] |
Specifies the size of the OPC UA MonitoredItem queue. 0 means the server returns the default queue size for the event notifications. 1 means the server returns the minimum queue size for the event notifications. |