Minimum Configuration - OPC UA Subscriptions
When you add an item to the database, various properties on the item's configuration Form are assigned a value automatically. These default values are assigned on creation of the database item, to help reduce the amount of manual configuration that is required. As such, you only need configure a subset of the properties that exist on an item's configuration Form. Typically, the properties you have to configure include:
- Those properties that require a value, but for which the property field is blank
- Those properties for which the value needs to differ from the default.
For an OPC UA Subscription to be capable of functioning in Geo SCADA Expert, as a minimum you have to specify these properties on the item's configuration Form:
- The OPC UA Server database item to which the subscription relates.
You also have to specify the address of the node(s) to which the subscription relates. You do this using the Node field on the configuration Forms of the OPC UA Points that are associated with the subscription (see Configure the Common Point Properties).
Also ensure that the OPC UA Subscription and the database items on which it depends are In Service, and have saved, valid configuration. This will produce an OPC UA Subscription that is capable of functioning using the default configuration settings.