8.6.2 MessagesType

The MessagesType is used to define the object sending events. These events are used for errors, warnings and messages.

The MessagesType is formally defined in Table 67.

Table 67 – MessagesType Definition
Attribute Value
BrowseNameMessagesType
IsAbstractFalse
References Node Class BrowseName DataType TypeDefinition Other
Subtype of the 0:BaseObjectType defined in OPC 10000-5 i.e. inheriting the InstanceDeclarations of that Node.
0:GeneratesEventObjectTypeAlertType
0:GeneratesEventObjectTypeNotificationEventType
Conformance Units
MachineTool Notification – Errors and Alerts

To differentiate between errors, warnings and messages on the interface, the following convention shall be used, with regard to the recommendations in OPC 10000-5:

Errors have a high 0:Severity between 667 and 1000 and are using an AlertType.

Warnings have a medium 0:Severity between 334 and 666 and are using an AlertType.

Messages have a low 0:Severity lower or equal to 333 and are using a NotificationEventType.