The AlertType is used to transport errors and warnings.
The AlertType is formally defined in Table 67.
Table 67 – AlertType Definition
Subtype of the AlarmConditionType defined in OPC 10000-9 which means it inherits the InstanceDeclarations of that Node.
The ErrorCode is used for the manufacturer defined error code. Often this is a numeric code whose meaning can be found in the manufacturer’s documentation for the machine tool.
It is supposed that any error message shown to users of the machine tool is transmitted with the AlertType in the Message Property inherited from the BaseEventType.