PhSignalType – OPC UA for Process Automation Devices

7.34 PhSignalType

The PhSignalType provides ObjectType to add pH measurement specific variables. It is formally defined in Table 180.

Table 180 – PhSignalType definition

Attribute	Value
BrowseName	PhSignalType
IsAbstract	False

References	NodeClass	BrowseName	TypeDefinition	Other
Subtype of AnalyticalSignalType defined in 7.27, i.e. inheriting the InstanceDeclarations of that Node
0:HasComponent	Object	<SignalCalibrationIdentifier>	0:BaseObjectType	OP
0:HasComponent	Object	SignalConditionSet	0:BaseObjectType	O

Conformance Units
PA-DIM PhSignalType
PA-DIM PhSignalType SensorNextCalibration
PA-DIM PhSignalType SensingElementImpedance
PA-DIM PhSignalType SensorReferenceImpedance
PA-DIM PhSignalType SensorCleaningsCounter
PA-DIM PhSignalType SensorSterilisationsCounter
PA-DIM IPhCalibration SensorT90

<SignalCalibrationIdentifier> is a container object for the calibration parameters of the signal. It is inherited from AnalogSignalType and has an additional interface reference to IPhCalibrationType to add pH signal specific calibration variables. Since it is a placeholder, an instance of PhSignalType can have several calibration objects.

SignalConditionSet is a container object for the condition parameters of the signal. It is inherited from AnalogSignalType and has an additional interface reference to IPhSignalConditionSetType to add pH signal specific condition variables.

The components of PhSignalType have additional references which are defined in Table 181.

Table 181 – PhSignalType additional References

SourceBrowsePath	Reference Type	Is Forward	TargetBrowsePath
<SignalCalibrationIdentifier>	0:HasInterface	True	IPhCalibrationType
	0:HasDictionaryEntry	True	3:0112/2///61987#ABA968#004
	0:HasDictionaryEntry	True	3:0112/2///61987#ABA968#004
SignalConditionSet	0:HasInterface	True	IPhSignalConditionSetType
	0:HasDictionaryEntry	True	3:0112/2///61987#ABA968#004
	0:HasDictionaryEntry	True	3:0112/2///61987#ABA968#004
	0:HasDictionaryEntry	True	3:0112/2///61987#ABA968#004
	0:HasDictionaryEntry	True	3:0112/2///61987#ABA968#004

The components of PhSignalType have additional subcomponents which are defined in Table 182.

Table 182 – PhSignalType additional subcomponents

BrowsePath	References	NodeClass	BrowseName	DataType	TypeDefinition	Others
Applied from IPhCalibrationType
<SignalCalibrationIdentifier>	0:HasComponent	Variable	SensorSlope	0:Float	0:AnalogUnitType	O
<SignalCalibrationIdentifier>	0:HasComponent	Variable	SensorAsymmetryPotential	0:Float	0:AnalogUnitType	O
<SignalCalibrationIdentifier>	0:HasProperty	Variable	SensorT90	0:Float	0:PropertyType	O
Applied from IPhSignalConditionSetType
SignalConditionSet	0:HasComponent	Variable	PhMeasuringMethod	0:UInt32	0:MultiStateDictionaryEntryDiscreteType	O
SignalConditionSet	0:HasComponent	Variable	SensingElementTemperature	0:Float	0:AnalogUnitType	O
SignalConditionSet	0:HasComponent	Variable	SensorNextCalibration	0:UInt32	0:AnalogUnitType	O
SignalConditionSet	0:HasComponent	Variable	SensingElementImpedance	0:Float	0:AnalogUnitType	O
SignalConditionSet	0:HasComponent	Variable	SensorReferenceImpedance	0:Float	0:AnalogUnitType	O
SignalConditionSet	0:HasProperty	Variable	SensorCleaningsCounter	0:UInt32	0:PropertyType	O
SignalConditionSet	0:HasProperty	Variable	SensorSterilisationsCounter	0:UInt32	0:PropertyType	O

The child Nodes of the PhSignalType have additional Attribute values defined in Table 183.

Table 183 – PhSignalType Attribute values for child Nodes

BrowsePath	Value Attribute
	0.0
	NamespaceUri: http://www.opcfoundation.org/UA/units/cdd/IEC62720 UnitId: 705749524 DisplayName: mV Description: millivolt
	0.0
	NamespaceUri: http://www.opcfoundation.org/UA/units/cdd/IEC62720 UnitId: 705749524 DisplayName: mV Description: millivolt
	0.0
	0
	ns=3;s=0112/2///61987#ABP718#001
	glass electrode
	0.0
	NamespaceUri: http://www.opcfoundation.org/UA/units/cdd/IEC62720 UnitId: 705741427 DisplayName: °C Description: degree Celsius
	0
	NamespaceUri: http://www.opcfoundation.org/UA/units/cdd/IEC62720 UnitId: 705745431 DisplayName: d Description: day
	0.0
	NamespaceUri: http://www.opcfoundation.org/UA/units/cdd/IEC62720 UnitId: 705741367 DisplayName: Ω Description: ohm
	0.0
	NamespaceUri: http://www.opcfoundation.org/UA/units/cdd/IEC62720 UnitId: 705741367 DisplayName: Ω Description: ohm
	0
	0