This OPC UA ObjectType represents an optical reader device (1D or 2D codes). It defines additional methods and properties required for managing optical code readers or to get additional information on their scan events.

Figure 8 shows an overview for the OpticalReaderDeviceType with its Methods and related ObjectType. It is formally defined in Table 11.

Figure 8 – OpticalReaderDeviceType overview

The OpticalReaderDeviceType is formally defined in Table 11.

Table 11 – OpticalReaderDeviceTypeDefinition

Attribute	Value
BrowseName	OpticalReaderDeviceType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Modelling Rule
Subtype of AutoIdDeviceType defined in 6.1.
HasComponent	Object	Images		FolderType	Optional
HasComponent	Method	Scan			Optional
GeneratesEvent	ObjectType	OpticalScanEventType	Defined in 7.4.

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

Table 12 – OpticalReaderDeviceType Additional Subcomponents

Source Path	References	NodeClass	BrowseName	DataType TypeDefinition	Others
RuntimeParameters	HasComponent	Variable	TemplateName	String BaseDataVariableType	O
RuntimeParameters	HasComponent	Variable	MatchCode	String BaseDataVariableType	O
Images	Organizes	Object	<ImageName>	0:FileType	OP

This FunctionalGroup is inherited from the AutoIdDeviceType and described in 6.1. Predefined runtime parameters for the OpticalReaderDeviceType are defined in Table 12.

The parameters TemplateName and MatchCode are described in 6.2.3.1.

For quality and testing purposes, the actual image taken by the optical reader can be accessed with this object. E.g. the picture might be checked by engineers if the optical decoding does not deliver the expected results.

The Images Object when available shall contain the list of FileType Objects (see Table 12) with the images taken by the optical reader.

The MIME type of an image is provided through the MimeType Property of the FileType.

This method starts the scan process of the optical reader device synchronous and returns the scan results. It overwrites the Scan method of the AutoIdDeviceType defined in 6.1.3.4.

Signature

Scan (

[in]ScanSettings Settings

[out]OpticalScanResult [] Results

[out]AutoIdOperationStatusEnumerationStatus

);

Argument	Description
Settings	Configuration settings for the scan execution. The ScanSettings DataType is defined in 9.3.7.
Results	Results of the scan execution. The OpticalScanResult DataType is defined in 9.3.10.
Status	Returns the status of the scan operation. The AutoIdOperationStatusEnumeration DataType is defined in 9.2.1.

Method Result Codes

ResultCode	Description
Bad_InvalidState	There is already a scan active
Bad_InvalidArgument	The scan setting contained an invalid value like infinite duration.
	Other OPC UA status codes defined for the Call Service in OPC 10000-4.