7 OPC UA ObjectTypes

Figure 13 shows all ObjectTypes which are defined by this companion specification.

7.1 SensorMonitoringType ObjectType Definition

The SensorMonitoringType represents a process value whose value is determined by a measuring device. It is formally defined in Table 12. The measuring device can be identified via the MachineryComponentIdentificationType from OPC 40001-1.

The process value and all associated metadata such as unit and value ranges are inherited from the ProcessValueType. The optional setpoint of the ProcessValueType must not be used in instances of this type. If a setpoint is needed, the subtypes SensorSetpointReadType and SensorSetpointWrite should be used.

Optionally it can be specified whether the measuring signal is provided in analog or digital form.

The components of the SensorMonitoringType have additional references which are defined in Table 14.

7.2 SensorSetpointReadType ObjectType Definition

The SensorSetpointReadType represents a process value and provides a setpoint for this value. It is formally defined in Table 15. A device is not required to provide a setpoint.

This type provides only read-access to the setpoint. Write-access is provided by SensorSetpointWriteType.

The component Variables of the SensorSetpointReadType have additional Attributes defined in Table 16.

The components of the SensorSetpointReadType have additional subcomponents which are defined in Table 17.

Some devices may control a process value via alternative, mutually exclusive setpoint (e.g. a target value for either pressure or airflow may be specified). The IsActiveSetpoint variable indicates whether the setpoint of an instance of this type is the currently active setpoint.

7.3 SensorSetpointWriteType ObjectType Definition

The SensorSetpointWriteType represents a process value and provides a readable and writable setpoint for this value. It is formally defined in Table 18.

The components of the SensorSetpointWriteType have additional subcomponents which are defined in Table 19.

7.4 ConsumptionType ObjectType Definition

The ConsumptionType contains information related to the consumption of a device and is formally defined in Table 20. Consumption can refer, for example, to electricity or compressed air consumption.

7.5 FilterSystemType ObjectType Definition

7.5.1 Overview

The FilterSystemType serves the purpose of extracting and filtering process gas, e.g., air. It consists of several filter units and other devices and components. It is formally defined in Table 22.

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

The MaintenanceRequestedConditionType is triggered when the MaintenanceRequested property changes.

The components of the FilterSystemType have additional subcomponents which are defined in Table 24.

The components of the FilterSystemType have additional references which are defined in Table 25.

7.5.2 OperationOn Method

The Method OperationOn turns the filter system machine on. It should only be available on the filter system if the filter units are considered components of the filter system and do not have their own OperationOn and OperationOff methods. The method changes the state of MachineryItemState. The signature of this Method is specified below. Table 26 specifies the AddressSpace representation.

Signature

	OperationOn ()

7.5.3 OperationOff Method

The Method OperationOff turns the filter system machine off. As with the OperationOn method, this method should be present under the FilterSystemType if and only if the filter units are considered components of the system rather than individual machines. The method changes the state of MachineryItemState. The signature of this Method is specified below. Table 27 specifies the AddressSpace representation.

Signature

	OperationOff ()

7.5.4 MachineryItemState StateMachine

This building block provides information about the state of a MachineryItem. It defines the states NotAvailable, OutOfService, NotExecuting and Executing. The exact semantics of the states are defined in OPC 40001-1. The StateMachine defines Transitions between all States. Instances might restrict the usage of the defined States and Transitions. An overview of the StateMachine is provided in Figure 15.

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.

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.

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

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)

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)

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)

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 ()

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 ()

7.7 AirConnectionType ObjectType Definition

7.7.1 Overview

The AirConnectionType is a non-tangible component representing the state of a connection from the ducting system to a filter unit. The connection can be open or closed. The open state represents a state of the ducting system where air can pass through to the filter unit.

It is formally defined in Table 40.

The Open and Close Methods can be called to open or close the connection. In a complex ducting system that consists of a network of joints and junctions, opening or closing the connection may involve switching multiple valves.

The control logic for switching the state of the ducting system is determined by the server implementation.

The air connection may contain optional sensors for humidity, temperature, air flow, gas quality, and air pressure.

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

The AirConnectionStatusChangedConditionType event is triggered when the ConnectionOpen property changes.

7.7.2 Open Method

The Method Open opens or switches all valves of the ducting system so that the air can pass through to the filter device. The signature of this Method is specified below. Table 42 specifies the AddressSpace representation.

Signature

	Open ()

7.7.3 Close Method

The Method Close closes or switches some of the valves in the ducting system so that no air may pass through the ducting system to the device. The signature of this Method is specified below. Table 43 specifies the AddressSpace representation.

Signature

	Close ()

7.8 FanType ObjectType Definition

The FanType represents a device for generating negative air pressure and is formally defined in Table 44.

The components of the FanType have additional references which are defined in Table 46.

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

The server sends a MaintenanceSwitchOnConditionType event when the physical maintenance switch is turned on.

7.9 TemperatureRegulatorType ObjectType Definition

The TemperatureRegulatorType represents a device for regulating the temperature of the process gas and is formally defined in Table 47.

The components of the TemperatureRegulatorType have additional references which are defined in Table 49.

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

7.10 SafetySystemType ObjectType Definition

The SafetySystemType is a generic component that represents a protective device. Each component in the PAEFS can reference an instance of the safety system via a Uses reference.

It is formally defined in Table 50.

The component Variables of the SafetySystemType have additional Attributes defined in Table 51.

The components of the SafetySystemType have additional references which are defined in Table 52.

The server sends a SafetySystemTriggeredAlarmType event when the safety system is triggered.

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

7.11 FilterAidDeviceType ObjectType Definition

7.11.1 Overview

The FilterAidDeviceType is a device for the application of a filter aid. It is formally defined in Table 53.

The components of the FilterAidDeviceType have additional references which are defined in Table 55.

If the filter aid reservoir is opened or closed, the event ContainerOpenConditionType will be triggered.

The event CompressedAirSupplyInterruptedAlarmType is triggered when the compressed air supply is interrupted.

When the value FilterAidDeviceStatus changes, the event FilterAidDeviceStatusChangedConditionType is triggered. The event contains a copy of the status value.

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

7.11.2 TriggerDosing Method

The Method TriggerDosing triggers a single additional dosage. The signature of this Method is specified below. Table 56 specifies the AddressSpace representation.

Signature

	TriggerDosing ()

7.11.3 ResetFillingLevel Method

The Method ResetFillingLevel resets the filling level of the filter aid reservoir. The signature of this Method is specified below. Table 57 specifies the AddressSpace representation.

Signature

	ResetFillingLevel ()

7.12 SeparatorType ObjectType Definition

The SeparatorType is the abstract base type for separators. It contains optional sensor values that are common to all separators. Users may use one of the subtypes provided within this specification or create their own type. It is formally defined in Table 58.

The component Variables of the SeparatorType have additional Attributes defined in Table 59.

The components of the SeparatorType have additional references which are defined in Table 60.

7.13 CartridgeFilterType ObjectType Definition

The CartridgeFilterType is a basic mechanical separator and is formally defined in Table 61.

7.14 AutomaticRollFilterType ObjectType Definition

The AutomaticRollFilterType is a separator that is regenerated by rolling up the filter medium. It is formally defined in Table 62.

The component Variables of the AutomaticRollFilterType have additional Attributes defined in Table 63.

The EndOfFilterRollAlarmType event is sent when the end of the filter roll is reached.

7.15 WetSeparatorType ObjectType Definition

The WetSeparatorType represents a separator that filters solid, liquid, or gaseous components using a liquid medium and is formally defined in Table 64.

The component Variables of the WetSeparatorType have additional Attributes defined in Table 65.

The WashingAgentDrainOpenConditionType event is triggered when the value of the property WashingAgentDrainOpen changes.

The WashingAgentInflowOpenConditionType event is triggered when the value of the property WashingAgentInflowOpen changes.

The server sends a WashingAgentDrainMalfunctionAlarmType event when the WashingAgentDrainMalfunction property changes.

The server sends a WashingAgentInflowMalfunctionAlarmType event when the WashingAgentInflowMalfunction property changes.

7.16 ElectrostaticPrecipitatorType ObjectType Definition

The ElectrostaticPrecipitatorType represents a separator that uses electrostatics to filter solid or liquid components from the process air and is formally defined in Table 66.