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).