The XML configuration files for event and data change notifications

The Probe for OPC Unified Architecture (UA) is delivered with the following XML configuration files that allow you to define event and data change items on the OPC UA server that you want the probe to monitor:

  • OPCUaEvent.xml
  • OPCUaDataChange.xml

If you want to subscribe to event notification only, customize the OPCUaEvent.xml configuration file. If you want to subscribe to data change notification only, customize the OPCUaDataChange.xml configuration file.

Note: Although it is possible to subscribe to both event notification and data change notification in the same XML configuration file (that is, either OPCUaEvent.xml or OPCUaDataChange.xml), the customizing the XML configuration file instructions explain how to customize OPCUaEvent.xml and OPCUaDataChange.xml separately.

The XML configuration files reside in the $OMNIHOME/var directory.

The following topics define the structure and content of the OPCUaEvent.xml and OPCUaDataChange.xml configuration files:

The following topic provides instructions on how to customize the OPCUaEvent.xml and OPCUaDataChange.xml configuration files:

Use the MonitoredItemsConfigFile property to specify the full path of the XML configuration file that contains information on the items that the probe is to monitor. The information in this file is used in the OPC UA CreateMonitoredItems service. You can specify OPCUaEvent.xml, OPCUaDataChange.xml, or a file name of your choice.