6.3 OpticalReaderDeviceType

6.3.1 General

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.

6.3.2 ObjectType definition

The OpticalReaderDeviceType is formally defined in Table 11.

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

6.3.3 ObjectType Description

6.3.3.1 Object RuntimeParameters

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.

6.3.3.2 Object Images

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.

6.3.3.3 Method Scan

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]	AutoIdOperationStatusEnumeration	Status
		);
	

Method Result Codes