Field | Description |
Search Node | Searches the node. |
Select All | Selects all check boxes for the variable nodes. |
Clear All | Deselects all check boxes for the variable nodes. |
Parameter | Description/Action |
Extended Node Id | Displays the extended node id of the selected event source node id. The extended node id is represented in the following format: nsu=<namespace uri>; Id type=Id value |
Node Id | The unique id of the selected event source node id to be monitored. |
Sampling Interval (ms) | The fastest rate at which the OPC UA server should sample its underlying source for data changes. Default : 0 |
Message Queue Size | The maximum number of messages stored in the queue for delivery. Default : 0 |
Discard Oldest Message | True. The oldest message from the queue gets discarded. False. No messages are discarded. If the queue size is full, any new messages are ignored. |
Monitoring Mode | Default. The monitoring mode specified during configuration of the listener. Note: All the other options override the listener's monitoring mode at each item level. Reporting. The datasource is sampled and the notification is sent to the Adapter for OPC. Sampling. The datasource is only sampled and no notification is sent to the Adapter for OPC. Disabled. The datasource is disabled. |
Filter | Defines the conditions on which you want to receive data change notifications. When the filter settings are set. a drop-down appears with the specified filter names. |
Parameter | Description/Action |
Filter Name | The name of the filter. |
Trigger Condition | The types of trigger conditions that enable the notification: Status / Value. Notifies if either the status or the value changes. Status. Notifies if only the status changes. Note: Since there is no value in this type of trigger condition, Deadband Type and Deadband Value are not applicable. Status / Value / Timestamp. Notifies if either the status, the value or the timestamp changes. |
Deadband Type | It defines the type of Deadband Value applied. The following are the types of deadband available: Absolute. If the absolute change in the last data value and new data value is greater than the value specified, it triggers the notification. Percent. If the changed data value is greater than the percentage of the configured value, it triggers the notification. None. No deadband evaluation is done. |
Deadband Value | The given value based on the Deadband Type. |