The OPC UA ReferenceType Controls is used to describe dependencies between objects which have a controlling character. The BrowseName Controls and the InverseName IsControlledBy describe semantically the hierarchical dependency e.g. a controlling device Controls a controlled machine module.

Example for usage in this companion specification: If one controller Controls several motion devices, each motion device IsControlledBy the same controller.

The SourceNode of this type shall be an ObjectType or Object and the TargetNode shall be an Object.

Table 50 – Controls Reference Definition

Attributes	Value
BrowseName	Controls
InverseName	IsControlledBy
Symmetric	False
IsAbstract	False
Subtype of the HierarchicalReferences defined in OPC Unified Architecture Part 5
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule