FilterUnitType ObjectType Definition – OPC UA for Process Air Extraction and Filtration Systems (PAEFS)

7.6 FilterUnitType ObjectType Definition

7.6.1 Overview

The FilterUnitType is a subcomponent of a filter system consisting of other devices and components.

It is formally defined in Table 28.

Table 28 – FilterUnitType Definition

Attribute	Value
BrowseName	FilterUnitType
IsAbstract	False

References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the BaseObjectType defined in OPC 10000-5
0:HasComponent	Object	<CleaningUnit>		CleaningUnitType	OP
0:HasComponent	Object	<Separator>		SeparatorType	OP
0:HasComponent	Object	<DischargeSystem>		DischargeSystemType	OP
0:HasComponent	Object	AirIntakeConnection		AirConnectionType	M
0:HasComponent	Object	AirOutletConnection		AirConnectionType	M
0:HasAddIn	Object	2:Identification		4:MachineryItemIdentificationType	O
0:HasComponent	Object	4:MachineryBuildingBlocks		0:FolderType	O
0:HasAddIn	Object	4:MachineryItemState		4:MachineryItemState_StateMachineType	M
0:HasComponent	Object	Airflow		SensorSetpointReadType	O
0:HasComponent	Object	Pressure		SensorSetpointReadType	O
0:HasComponent	Object	RotationalSpeed		SensorSetpointReadType	O
0:HasProperty	Variable	MaintenanceRequested	0:Boolean	0:PropertyType	O,R
0:HasComponent	Object	PowerConsumption		ConsumptionType	O
0:HasComponent	Object	AirConsumption		ConsumptionType	O
0:HasProperty	Variable	Malfunction	0:Boolean	0:PropertyType	M,R
0:HasComponent	Object	PressureLoss		SensorMonitoringType	O
0:HasComponent	Method	OperationOn			O
0:HasComponent	Method	OperationOff			O
0:HasComponent	Method	SetAndActivateAirflowSetpoint			O
0:HasComponent	Method	SetAndActivatePressureSetpoint			O
0:HasComponent	Method	SetAndActivateRotationalSpeedSetpoint			O
0:GeneratesEvent	ObjectType	MaintenanceRequestedConditionType
0:GeneratesEvent	ObjectType	MalfunctionAlarmType
0:HasInterface	ObjectType	2:IOperationCounterType
Applied from IOperationCounterType
0:HasProperty	Variable	PowerOnDuration	0:Duration	0:PropertyType	O
0:HasProperty	Variable	OperationDuration	0:Duration	0:PropertyType	O
0:HasProperty	Variable	OperationCycleCounter	0:UInteger	0:PropertyType	O

Conformance Units
PAEFS FilterUnitType Basic
PAEFS FilterUnitType Advanced
PAEFS FilterUnit Component Identification
PAEFS FilterUnit Machine Identification
PAEFS FilterUnit Statemachine
PAEFS Operation FilterUnitType
PAEFS FilterUnit Airflow Setpoint
PAEFS FilterUnit Pressure Setpoint
PAEFS FilterUnit Rotational Speed Setpoint
PAEFS FilterUnitType Events

Table 29 – FilterUnitType Attribute values for child nodes

BrowsePath	Attribute Description
<CleaningUnit>	The cleaning units that are part of the filter unit.
<Separator>	The separators that are part of the filter unit.
<DischargeSystem>	The discharge systems that are part of the filter unit.
AirIntakeConnection	The connection to the ducting system from which the polluted process gas enters the filter unit.
AirOutletConnection	The connection to the ducting system through which the cleaned process gas leaves the filter unit.
2:Identification	Data for machine identification (OPC 40001-1): The Identification folder can have either the concrete type MachineIdentificationType or MachineryComponentType. If the filter unit is considered a component of a larger filter machine, MachineryComponentType is used. If the filter unit is considered a machine by itself, MachineIdentificationType is used.
	The nominal airflow of the filter unit is the value specified by the manufacturer which defines the nominal extraction capacity of a filter unit under operating conditions.
	The marking on the type plate of the filter unit regarding explosion protection.
	The rated power of the filter unit is the nominal electrical power of the filter unit under operating conditions specified by the manufacturer.
4:MachineryItemState	StateMachine representing the operating state of the filter unit (OPC 40001-1).
Airflow	Setpoint for the airflow that flows through the filter unit.
Pressure	Setpoint for the negative pressure at the filter unit. Describes the setpoint value for the pressure difference of the raw gas side compared to the environment.
RotationalSpeed	Setpoint for the rotational speed of a "virtual" fan. This value is a setpoint. In reality, the filter system can have several fans.
MaintenanceRequested	The maintenance request allows the manufacturer to inform the operator that the system requires maintenance. True = maintenance requested by system. False = no maintenance requested.
PowerConsumption	Contains information regarding the energy consumption of the filter unit.
AirConsumption	Contains information regarding the consumption of compressed air of the filter unit.
Malfunction	One or more subsystems of the filter unit have a malfunction. True in case of error.
PressureLoss	The specification of the total pressure loss of the filter unit between the device intake connection on the raw gas side and the device outlet on the clean gas side.

The server sends a MalfunctionAlarmType event when the Malfunction property changes.

The MaintenanceRequestedConditionType is triggered when the MaintenanceRequested property changes.

The amount of gas that is processed by the filter unit can be governed either by airflow, pressure, or rotational fan speed. Only one of these three quantities can be specified as the setpoint at a time.

The methods SetAndActivateAirflowSetpoint, SetAndActivatePressureSetpoint, and SetAndActivateRotationalSpeedSetpoint set the value of the setpoint and set this setpoint as the active setpoint.

Each of the objects Airflow, Pressure, and RotationalSpeed of type SensorType contains a read-only boolean variable IsActiveSetpoint. The boolean IsActiveSetpoint indicates which of the three setpoints is currently active. IsActiveSetpoint must be true for exactly one quantity at any given time.

Table 30 – FilterUnitType Additional Subcomponents

Source Path	Reference	NodeClass	BrowseName	DataType	TypeDefinition	Others
2:Identification	0:HasComponent	Variable	NominalAirflow	0:Double	0:AnalogUnitRangeType	M,R
2:Identification	0:HasProperty	Variable	ExIdentification	0:String	0:PropertyType	O,R
2:Identification	0:HasComponent	Variable	RatedPower	0:Double	0:AnalogUnitRangeType	O,R

The components of the FilterUnitType have additional references which are defined in Table 31.

Table 31 – FilterUnitType Additional References

SourceBrowsePath	Reference Type	Is Forward	TargetBrowsePath
4:MachineryBuildingBlocks	0:HasAddIn	True	2:Identification
4:MachineryBuildingBlocks	0:HasAddIn	True	4:MachineryItemState

7.6.2 SetAndActivateAirflowSetpointMethod

The Method SetAndActivateAirflowSetpoint sets a setpoint for the airflow. The value’s unit is the same as the one specified in object Airflow. Since setpoints are mutually exclusive, the method also sets the boolean IsActiveSetpoint of the setpoints for pressure and rotational speed to false.

The signature of this Method is specified below. Table 32 and Table 33 specify the Arguments and AddressSpace representation, respectively.

Signature

	SetAndActivateAirflowSetpoint(
		[in]	0:Double		Value)

Table 32 – SetAndActivateAirflowSetpointMethod Arguments

Argument	Description
Value	New setpoint value

Table 33 – SetAndActivateAirflowSetpointMethod AddressSpace Definition

Attribute	Value
BrowseName	SetAndActivateAirflowSetpoint

References	Node Class	BrowseName	DataType	TypeDefinition	ModellingRule
0:HasProperty	Variable	0:InputArguments	0:Argument[]	0:PropertyType	0:Mandatory

Conformance Units
PAEFS FilterUnit Airflow Setpoint

7.6.3 SetAndActivatePressureSetpoint Method

The Method SetAndActivatePressureSetpoint sets a setpoint for the pressure. The value’s unit is the same as the one specified in object Pressure. Since setpoints are mutually exclusive, the method also sets the boolean IsActiveSetpoint of the setpoints for airflow and rotational speed to false. The signature of this Method is specified below.

Table 34 and Table 35 specify the Arguments and AddressSpace representation, respectively.

Signature

	SetAndActivatePressureSetpoint (
		[in]	0:Double	Value)

Table 34 – SetAndActivatePressureSetpoint Method Arguments

Argument	Description
Value	New setpoint value

Table 35 – SetAndActivatePressureSetpoint Method AddressSpace Definition

Attribute	Value
BrowseName	SetAndActivatePressureSetpoint

References	Node Class	BrowseName	DataType	TypeDefinition	ModellingRule
0:HasProperty	Variable	0:InputArguments	0:Argument[]	0:PropertyType	0:Mandatory

Conformance Units
PAEFS FilterUnit Pressure Setpoint

7.6.4 SetAndActivateRotationalSpeedSetpoint Method

The Method SetAndActivateRotationalSpeedSetpoint sets a setpoint for the rotational speed. The value’s unit is the same as the one specified in object RotationalSpeed. Since setpoints are mutually exclusive, the method also sets the boolean IsActiveSetpoint of the setpoints for airflow and pressure to false.

The signature of this Method is specified below. Table 36 and Table 37 specify the Arguments and AddressSpace representation, respectively.

Signature

	SetAndActivateRotationalSpeedSetpoint (
		[in]	0:Double	Value)

Table 36 – SetAndActivateRotationalSpeedSetpoint Method Arguments

Argument	Description
Value	New setpoint value

Table 37 – SetAndActivateRotationalSpeedSetpoint Method AddressSpace Definition

Attribute	Value
BrowseName	SetAndActivateRotationalSpeedSetpoint

References	Node Class	BrowseName	DataType	TypeDefinition	ModellingRule
0:HasProperty	Variable	0:InputArguments	0:Argument[]	0:PropertyType	0:Mandatory

Conformance Units
PAEFS FilterUnit Rotational Speed Setpoint

7.6.5 OperationOn Method

The Method OperationOn turns the machine on. It should only be available on the filter unit if the filter unit is considered a machine, rather than a component of a larger machine. If the filter unit is only a component of a larger machine, the OperationOn Method should be present on the filter system. The method changes the state of MachineryItemState.

Table 38 specifies the AddressSpace representation.

Signature

	OperationOn ()

Table 38 – OperationOn Method AddressSpace Definition

Attribute	Value
BrowseName	OperationOn

References	Node Class	BrowseName	DataType	TypeDefinition	ModellingRule
Conformance Units
PAEFS Operation FilterUnitType

7.6.6 OperationOff Method

The Method OperationOff turns the machine off. As with the OperationOn Method, this method should be present under the filter unit if and only if the filter unit is considered a machine. The signature of this Method is specified below. Table 39 specifies the AddressSpace representation. The method changes the state of MachineryItemState.

Signature

	OperationOff ()

Table 39 – OperationOff Method AddressSpace Definition

Attribute	Value
BrowseName	OperationOff

References	Node Class	BrowseName	DataType	TypeDefinition	ModellingRule
Conformance Units
PAEFS Operation FilterUnitType