7 OPC UA ObjectTypes ToC Previous Next

7.21 SystemRequirementsType ObjectType Definition ToC Previous Next

The SystemRequirementsType provides static Variables for parameters of the process in which the Pump is to be used and is formally defined in Table 49.

Table 49 – SystemRequirementsType Definition

Attribute Value        
BrowseName SystemRequirementsType        
IsAbstract False        
References Node Class BrowseName DataType TypeDefinition Other
Subtype of the 2:FunctionalGroupType defined in OPC 10000-100, i.e. inheriting the InstanceDeclarations of that Node.          
0:HasComponent Variable CompressionRatio 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable ExplosionZone ExplosionZoneOptionSet 0:DataItemType O, RW
0:HasComponent Variable Fieldbus FieldbusEnum 0:DataItemType O, RW
0:HasComponent Variable Fluid 0:String 0:DataItemType O, RW
0:HasComponent Variable GasContent 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable HeightOfTheInletSideOfTheInstallation 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable HeightOfTheOutletSideOfTheInstallation 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable HeightOfThePump 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumAmbientTemperature 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumFlow 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumHead 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumInletPressure 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumOutletPressure 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumRelativeHumidity 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MaximumTemperature 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MeanTimeBetweenFailures 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumAmbientTemperature 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumFlow 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumHead 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumInletPressure 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumOutletPressure 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumRelativeHumidity 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable MinimumTemperature 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable Multi_Phase 0:Boolean 0:TwoStateDiscreteType O, RW
0:HasComponent Variable NetPositiveInletPressureAvailable 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable NormalFlow 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable NpshDatumPlane 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable OperatingMode OperatingModeEnum 0:DataItemType O, RW
0:HasComponent Variable RatedInletPressureOfTheInstallation 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable RatedPumpUnitTotalHead 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable ReferencePlane 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable RequiredControlMode ControlModeEnum 0:DataItemType O, RW
0:HasComponent Variable RequiredTime 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable SolidContent 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable Throughput 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable UltimatePressureOfAVacuumPump 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable WorkingTemperature 0:Double 0:BaseAnalogType O, RW

The InstanceDeclarations of the SystemRequirementsType have additional Attributes defined in Table 50. The Variables and the associated Descriptions are based on the standards DIN EN ISO 17769-1, DIN ISO 21360-1, ISO 3529-2, DIN 28400-2, DIN EN 13306 and VDI 3805-4.

Table 50 – SystemRequirementsType Attribute values for child Nodes

BrowsePath Value Attribute Description Attribute
CompressionRatio   Ratio of the backing pressure, p3, to the inlet pressure, p1, of the vacuum pump without throughput
ExplosionZone   Categories of explosion zones for devices according to 2014/34/EU (ATEX).
Fieldbus   Selected fieldbus for the product
Fluid   Fluid that is handled by the pump at specified operating conditions
GasContent   Proportion of gaseous substance in the liquid to be pumped, either as a contaminant or as vapor from the main body of liquid
   GasContent
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 20529
DisplayName: %
Description: percent
 
HeightOfTheInletSideOfTheInstallation   Height of the fluid level on the inlet side of the installation, or in the center of the inlet manifold
   HeightOfTheInletSideOfTheInstallation
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
HeightOfTheOutletSideOfTheInstallation   Height of the fluid level on the outlet side of the installation or in the center of the outlet manifold
   HeightOfTheOutletSideOfTheInstallation
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
HeightOfThePump   Height of the center of the pump
   HeightOfThePump
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
MaximumAmbientTemperature   Highest ambient temperature to be expected under normal circumstances
   MaximumAmbientTemperature
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4932940
DisplayName: K
Description: kelvin
 
MaximumFlow   Greatest rate of flow which is expected at operating conditions
   MaximumFlow
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067091
DisplayName: m³/s
Description: cubic metre per second
 
MaximumHead   Highest total head developed by a pump at any rate of flow
   MaximumHead
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
MaximumInletPressure   Highest inlet pressure to which the pump is subjected during operation
   MaximumInletPressure
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
MaximumOutletPressure   Maximum possible pressure at outlet, due either to internal energy increase (rotodynamic pumps) or external downstream restrictions (volumetric pumps)
   MaximumOutletPressure
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
MaximumRelativeHumidity   Highest relative humidity that can be expected under normal circumstances.
   MaximumRelativeHumidity
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 20529
DisplayName: %
Description: percent
 
MaximumTemperature   Highest fluid temperature to be expected under operating conditions
   MaximumTemperature
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4932940
DisplayName: K
Description: kelvin
 
MeanTimeBetweenFailures   Average of the times between failures
   MeanTimeBetweenFailures
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4740434
DisplayName: h
Description: hour
 
MinimumAmbientTemperature   Lowest ambient temperature to be expected under normal circumstances
   MinimumAmbientTemperature
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4932940
DisplayName: K
Description: kelvin
 
MinimumFlow   Smallest rate of flow which is expected at operating conditions
   MinimumFlow
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067091
DisplayName: m³/s
Description: cubic metre per second
 
MinimumHead   Smallest total head developed by a pump at any rate of flow
   MinimumHead
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
MinimumInletPressure   Lowest inlet pressure that can occur during operation for the pump
   MinimumInletPressure
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
MinimumOutletPressure   Lowest outlet pressure that can occur during operation for the pump
   MinimumOutletPressure
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
MinimumRelativeHumidity   Lowest relative humidity to be expected under normal circumstances.
   MinimumRelativeHumidity
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 20529
DisplayName: %
Description: percent
 
MinimumTemperature   Lowest fluid temperature to be expected under operating conditions
   MinimumTemperature
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4932940
DisplayName: K
Description: kelvin
 
Multi_Phase   Comprising a fluid together with substances in solid or gaseous states, whether due to deliberate addition or a change of state caused by a change in conditions. A “True” status means that there is a possibility of multi-phase-fluid and a “False” status means that there is no possibility of multi-phase-fluid.
NetPositiveInletPressureAvailable   Total pressure (including velocity pressure) at the pump inlet connection less the liquid vapor pressure at the present temperature of the liquid
   NetPositiveInletPressureAvailable
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
NormalFlow   Rate of flow at which usual operation is expected
   NormalFlow
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067091
DisplayName: m³/s
Description: cubic metre per second
 
NpshDatumPlane   Horizontal plane through the center of the circle described by the external points of the entrance edges of the impeller blades, in the first stage in the case of multi-stage pumps
   NpshDatumPlane
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
OperatingMode   Specifies whether the pump is to be operated in single, parallel or series connection.
RatedInletPressureOfTheInstallation   Inlet pressure of the installation for the working conditions
   RatedInletPressureOfTheInstallation
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
RatedPumpUnitTotalHead   Difference of the total head, at the outlet side of the pump unit from the total head at the inlet side of the pump unit, at which usual operation is expected
   RatedPumpUnitTotalHead
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
ReferencePlane   Any horizontal plane for use as the datum for height measurement
   ReferencePlane
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5067858
DisplayName: m
Description: metre
 
RequiredControlMode   Specifies which control mode is to be used for the use case.
RequiredTime   Time interval throughout which an item is required to be in an up state
   RequiredTime
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4740434
DisplayName: h
Description: hour
 
SolidContent   Proportion of solids contained in the fluid to be pumped, either as a contaminant or as a deliberate useful burden or suspension
   SolidContent
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 20529
DisplayName: %
Description: percent
 
Throughput   Amount of fluid flowing through a duct
   Throughput
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4665393
DisplayName: Pa·m³/s
Description: pascal cubic metre per second
 
UltimatePressureOfAVacuumPump   The ultimate pressure is the value to which the pressure in a standardized test dome approaches asymptotically during normal operation of the vacuum pump and without gas inlet. A difference can be made between the final pressure caused by gases and the final pressure caused by gases and vapors.
   UltimatePressureOfAVacuumPump
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5259596
DisplayName: Pa
Description: pascal
 
WorkingTemperature   Temperature determined by the given application and fluid.
   WorkingTemperature
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 4932940
DisplayName: K
Description: kelvin
 

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