OPC UA for Compressed Air Systems – Part 1: Main Control Systems
7.34 CompressorDesignType ObjectType Definition
The CompressorDesignType extends its supertype by compressor specific Variables and is formally defined in Table 72.
Table 72 – CompressorDesignType Definition
Attribute
Value
BrowseName
CompressorDesignType
IsAbstract
False
References
Node Class
BrowseName
DataType
TypeDefinition
Other
Subtype of the DesignType defined in 7.33, i.e. inheriting the InstanceDeclarations of that Node
0:HasComponent
Variable
DisplacementType
DisplacementTypeEnum
0:DataItemType
O, RO
0:HasComponent
Variable
LubricationType
LubricationTypeEnum
0:DataItemType
O, RO
0:HasComponent
Variable
NumberOfStages
0:UInt16
0:DataItemType
O, RO
0:HasComponent
Variable
VariableFlow
0:Boolean
0:TwoStateDiscreteType
O, RO
The following nodes override properties and components of the DesignType
0:HasComponent
Variable
ComponentClass
CompressorTypeEnum
0:DataItemType
O, RO
The InstanceDeclarations of the CompressorDesignType have additional Attributes defined in Table 73.
Table 73 – CompressorDesignType Attribute values for child Nodes
Source Path
Value Attribute
Description Attribute
ComponentClass
Enumeration of possible compressor types.
DisplacementType
Enumeration of possible displacement types.
LubricationType
Enumeration of possible lubrication types for the compression process of a compressor.
NumberOfStages
Number of stages the compressor has available.
VariableFlow
Indicates if a compressor has a variable or fixed flow.
'Fixed flow' means the product offers no control for changing the volume flow independent of pressure.
'Variable flow' means the compressor package allows an intentional change in volume flow rate, most obviously by VSD but also by adjustable guide vanes in turbo compressors or by valve controls in piston compressors or other means.
