6 PackML Data Representation Model ToC Previous Next

6.4 Variables and VariableTypes ToC Previous Next

6.4.1 InterlockVariableType ToC Previous Next

This Variable reflects an interlock. It is defined in Table 12.

Table 12 – InterlockVariableType definition

Attribute Value
BrowseName InterlockVariableType
IsAbstract False
ValueRank Scalar
DataType Boolean

Subtype of the BaseDataVariableType defined in OPC 10000-5

References NodeClass BrowseName DataType TypeDefinition ModellingRule

Instances of the InterlockType VariableType shall have a BrowseName that provides a descriptive name of the interlock. The instance of the VariableType shall include a description that provide further information about the interlock. For example, in a labelling machine, if the bin for label becomes empty, an interlock may exist that has a name of LabelStockEmpty with a description of “the label stock for the green label is empty”. This Variable would become active (set to true) when the label stock becomes empty, which triggers the machine to become interlocked.

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