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8.6 Notification ToC Previous Next

8.6.2 MessagesType ToC Previous Next index

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 54.

Table 54 – MessagesType Definition

Attribute Value        
BrowseName MessagesType        
IsAbstract False        
References Node Class BrowseName DataType TypeDefinition Other
Subtype of the BaseObjectType defined in OPC 10000-5 i.e. inheriting the InstanceDeclarations of that Node.          
0:GeneratesEvent ObjectType AlertType      
0:GeneratesEvent ObjectType NotificationEventType      

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 Severity between 667 and 1000 and are using an AlertType.

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

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

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