DryerOperationalType ObjectType Definition – OPC UA for Compressed Air Systems

7.50 DryerOperationalType ObjectType Definition

The DryerOperationalType extends its supertype by dryer specific Variables and is formally defined in Table 106.

Table 106 – DryerOperationalType Definition

Attribute	Value
BrowseName	DryerOperationalType
IsAbstract	False

References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the OperationalType defined in 7.45, i.e. inheriting the InstanceDeclarations of that Node.
0:HasComponent	Variable	PressureDewPoint	0:Double	0:BaseAnalogType	O, RO

The following nodes override nodes added by the OperationalType
0:HasComponent	Variable	OnOff	0:Boolean	0:TwoStateDiscreteType	O, RO
0:HasComponent	Variable	OperatingState	DryerOperatingStateEnum	0:DataItemType	O, RO

The following illustrations of a state machines do not imply the actual function or state machines for dryers. It serves as an example of how the actual state machines may function.

Figure 33 –DryerOperationalType Adsorption Dryer State Machine Illustration

Figure 34 –DryerOperationalType Refrigerant Dryer State Machine Illustration

Figure 35 –DryerOperationalType Membrane Dryer State Machine Illustration

The InstanceDeclarations of the DryerOperationalType have additional Attributes defined in Table 107.

Table 107 – DryerOperationalType Attribute values for child Nodes

Source Path	Value Attribute	Description Attribute
OnOff		Actual OnOff state of the dryer. For membrane dryers this describes the state of the controller.
	“The dryer is switched off.”
	“The dryer is switched on.”
OperatingState		Actual operating state of the dryer.
PressureDewPoint		Measured or calculated actual pressure dew point of the process fluid at a dryer.