Defined in File Ifc4x1.h
IfcUnitaryControlElement: public Ifc4x1::IfcDistributionControlElement¶
A unitary control element combines a number of control components into a single product, such as a thermostat or humidistat. A unitary control element provides a housing for an aggregation of control or electrical distribution elements that, in combination, perform a singular (unitary) purpose. Each item in the aggregation may have its own geometric representation and location.
HISTORY New entity in IFC2x4
Type Use Definition IfcUnitaryControlElement defines the occurrence of any unitary control element; common information about unitary control element types is handled by IfcUnitaryControlElementType. The IfcUnitaryControlElementType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcUnitaryControlElementType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcUnitaryControlElementType has ports or aggregated elements, such objects are reflected at the IfcUnitaryControlElement occurrence using the IfcRelDefinesByObject relationship. Figure 181 illustrates unitary control element type use. Figure 181 — Unitary control element type use
Property Use Definition The property sets relating to this entity are defined by IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. Property sets may also be specified at the IfcUnitaryControlElementType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcUnitaryControlElementType.HasPropertySets. If both are given, then the properties directly defined at IfcUnitaryControlElement override the properties defined at IfcUnitaryControlElementType. Refer to the documentation at the supertype IfcDistributionControlElement and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: Pset_UnitaryControlElementPHistory (PSET_PERFORMANCEDRIVEN) Pset_UnitaryControlElementTypeCommon (PSET_TYPEDRIVENOVERRIDE)
Quantity Use Definition The quantities relating to this entity are defined by IfcElementQuantity and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. The following base quantities are defined and shall be exchanged with the IfcElementQuantity.Name = ‘BaseQuantities’. Other quantities, being subjected to local standard of measurement, may be defined with another string value assigned to Name. In this case a valid value for MethodOfMeasurement shall be provided.
Material Use Definition The material of the IfcUnitaryControlElement is defined by IfcMaterialConstituentSet or as a fallback by IfcMaterial, and attached by the RelatingMaterial attribute on the IfcRelAssociatesMaterial relationship. It is accessible by the HasAssociations inverse attribute. Material information can also be given at the IfcUnitaryControlElementType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:
Casing: Material from which the casing is constructed.
Connection Use Definition The IfcUnitaryControlElement may be connected to other objects as follows using the indicated relationship:
IfcDistributionFlowElement (IfcRelFlowControlElements): Sensors may be connected to a flow element for which an aspect of the fluid or flow is measured. IfcElement (IfcRelConnectsElements): Sensors may be attached to the exterior of an element.
Port Use Definition The distribution ports relating to the IfcUnitaryControlElement are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the unitary control element occurrence is defined by IfcUnitaryControlElementType, then the port occurrences must reflect those defined at the IfcUnitaryControlElementType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcUnitaryControlElement PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:
Control (CONTROL, SOURCE): Receives power (typically 24V), and closes the circuit for Fan, Heat, and Cool. Port may be aggregated into sub-ports: ‘Fan’(SIGNAL,SOURCE), ‘Heat’(SIGNAL,SOURCE), and ‘Cool’(SIGNAL,SOURCE)
Figure 182 illustrates unitary control element port use. Figure 182 — Unitary control element port use
Whether the optional attribute PredefinedType is defined for this IfcUnitaryControlElement.
IfcUnitaryControlElement(std::string v1_GlobalId, ::Ifc4x1::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4x1::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4x1::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4x1::IfcUnitaryControlElementTypeEnum::Value> v9_PredefinedType)¶