This OPC UA DefectDetectionSensorType ObjectType describes a sensor fitted to the machine module that detect product defects.

Figure 19 shows an overview for the DefectDetectionSensorType with related Objects. It is formally defined in Table 36.

Figure 19 – DefectDetectionSensorType overview

The DefectDetectionSensor is formally defined in Table 36.

Table 36 – DefectDetectionSensorType Definition

Attribute	Value
BrowseName	DefectDetectionSensorType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Modelling Rule
Subtype of DeviceType defined in OPC 10000-100
HasProperty	Variable	Description	LocalizedText	PropertyType	Mandatory
HasComponent	Variable	DetectionCountMasterTotal	Int64	BaseDataVariableType	Mandatory
HasComponent	Variable	DetectionCountTotal	Int64	BaseDataVariableType	Mandatory
HasProperty	Variable	DetectionMode	Boolean	PropertyType	Mandatory
HasProperty	Variable	DisplayName	LocalizedText	PropertyType	Mandatory
HasComponent	Variable	SensorValue	Double	AnalogItemtype	Mandatory Placeholder
HasComponent	Object	UIInfo		UIInformation	Mandatory
HasComponent	Method	ResetDetectionCountTotal			Mandatory
HasComponent	Method	SetDetectionMode			Mandatory
HasComponent	Method	LoadReferenceImages			Optional
GeneratesEvent	ObjectType	DefectDetectedLogType
GeneratesEvent	ObjectType	DefectDetectionSensorDisabledType

The DefectDetectionSensorType ObjectType is a concrete type and can be used directly.

The following properties are already included in the DeviceType.

The Manufacturer property provides the name of the manufacturer that supplied the part (e.g. "Siemens”).

The Model property provides the name of the part as identified by the manufacturer (e.g. "S7- CPU 1515-2 PN").

The RevisionCounter property provides the revision level of the part as identified by the manufacturer (e.g. "").

The Serial property provides the serial number of the part as identified uniquely by the manufacturer.

The following Objects are defined to extend the DeviceType.

The Property Description describes the defect detected and detection sensor.

The DetectionCountTotal Variable counts how many times a defect was detected by the sensor while the DetectionMode is true. Increments at every detection, never reset to zero.

The Value of the Variable DetectionCountTotal shall be persisted both in the OPC UA Server and in the underlying system so that if one fails and/or is replaced, the other will allow restoring the Value when the OPC UA Server and underlying system are on separate hardware infrastructure.

The DetectionCountMasterTotal Variable counts how many times a defect was detected by the sensor while the DetectionMode is true. The Value of theVariable DetectionCountMasterTotal is never reset.

The Value of the Variable DetectionCountMasterTotal shall be persisted both in the OPC UA Server and in the underlying system so that if one fails and/or is replaced, the other will allow restoring the Value when the OPC UA Server and underlying system are on separate hardware infrastructure.

The DetectionMode Variable indicates if the defection sensor is active (when the value is True) or not active (when the value is false).

The DisplayName Variable represents an identification to be used for the defect detection sensor in displays and HMI faceplates.

The Variable SensorValue is the value of the quantity sensed by the sensor.

A defect detection sensor device may measure multiple physical properties, e.g. net tobacco weight, moisture, foreign matters etc.. Each property measured shall be modelled as a separate SensorValue Variable, which is to this purpose a Mandatory Placeholder Variable.

The type of the Variable SensorValue is AnalogItemType and is defined in OPC 10000-8. Thus SensorValue inherits the Definition Property that shall be used to define the physical property measured. The Definition Property is used to identify the semantics of the measurement, e.g “Measurement of the cigarette diameter” or “Measurement of the cigarette circumference”.

The Object UIInfo contains information about the User Interface (UI) of the defect sensor. When an Object does not have own UIInfo, then the Object does not require visualisation.

The Method LoadReferenceImages loads to the underlying system images to be used as references for visual defect detection.

Signature

LoadReferenceImages (

[in] Image[] Images

[out] MethodExecutionFeedbackTypeExecutionFeedback

);

Argument	Description
Images	The list of images to be used as references for an image detection system.
ExecutionFeedback	The extended feedback returning a detailed message in case of execution failure.

Method Result Codes

The Method ResetDetectionCountTotal resets to zero the DetectionCountTotal.

Signature

ResetDetectionCountTotal (

[out]MethodExecutionFeedbackType ExecutionFeedback

);

ResultCode	Description
BadNodeIdUnknown	See table 173 in OPC 10000-4 for the description of these result codes.
BadTypeMismatch
BadOutOfRange
BadNotWritable
BadNotFound

Argument	Description
ExecutionFeedback	The extended feedback returning a detailed message in case of execution failure.

Method Result Codes

The Method SetDetectionMode enables or disables the defect detection sensor.

Signature

GetPage (

[in]Boolean Enable

[out]MethodExecutionFeedbackTypeExecutionFeedback

);

ResultCode	Description
BadNodeIdUnknown	See table 173 in OPC 10000-4 for the description of these result codes.
BadTypeMismatch
BadOutOfRange
BadNotWritable
BadNotFound

Argument	Description
Enable	Specifies if the method enables or disables the defect detection sensor
ExecutionFeedback	The extended feedback returning a detailed message in case of execution failure.

Method Result Codes

ResultCode	Description
BadNodeIdUnknown	See table 173 in OPC 10000-4 for the description of these result codes.
BadTypeMismatch
BadOutOfRange
BadNotWritable
BadNotFound