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9.5 ParameterChangeLogType ToC Previous Next

The ParameterChangeLogType is used for the logging of relevant changes in production parameters.

The decision which parameter is relevant for the production is done by the machine.

Table 14 – ParameterChangeLogType Definition

Attribute Value        
BrowseName ParameterChangeLogType        
IsAbstract True        
References Node Class BrowseName DataType TypeDefinition Other
Subtype of LogbookEventType          
0:HasProperty Variable ParameterId 0:String 0:PropertyType M
0:HasProperty Variable OldValue 0:BaseDataType 0:PropertyType M
0:HasProperty Variable OldValueUnit 0:EUInformation 0:PropertyType O
0:HasProperty Variable NewValue 0:BaseDataType 0:PropertyType M
0:HasProperty Variable NewValueUnit 0:EUInformation 0:PropertyType O

The ParameterId Property represents the Id of the changed parameter.

The OldValue Property represents the old value of the changed parameter.

The NewValue Property represents the new value of the changed parameter.

Depending on the changed parameter, the Datatype of OldValue and NewValue are subtypes of 0:BaseDataType (0:String, Number, …). Where the unit is important (e.g. temperatures, lengths…), also OldValueUnit and NewValueUnit shall be used (see OPC UA Part 5 for the definition of EUInformation).

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