SNReturnUnallocated – This method sends unallocated serial numbers back to an OPC UA Server that is performing serial number management of unassigned serial numbers for a specific Serial Number Pool.

The signature of this Methodis specified below. Table 11and Table 12specify the Argumentsand AddressSpacerepresentation, respectively.

Signature

SNReturnUnallocated (

[in]OPENSCSSNCollectionDataTypeSNCollection

[in]OPENSCSKeyValueDataType[]PoolSelectionCriteria

[in]String SNFormat

[out]OPENSCSReturnEnum ReturnStatus

);

Table 11– SNReturnUnallocated Method Arguments

Argument

Description

SNCollection

Contains a Serial Number Collection from which Serial Numbers were originally provided.

If the Serial Number Collection ID does not match a Serial Number Collection managed by the Information Provider, then an “Invalid Serial Number Collection” error is returned.

PoolSelectionCriteria

Identified value to be used by the method provider to determine which pool to return the Serial Numbers to.

If no Pool Selection Criteria is defined, then the default Pool Selection Criteria of the method provider is used.

If the pool selection criteria is not known to the server, then an “Invalid selection Criteria” error is returned.

SNFormat

The serial number format of the serial numbers being returned.

If the Serial Number Format is not known to the method provider, then an “Invalid Serial Number Format” error is returned.

ReturnStatus

Returns the status of the method execution.

Method Result Codes are defined as part of the Call service (see OPC 10000-4and Table 95).

Table 12– SNReturnUnallocated Method AddressSpace Definition

Attribute

Value

BrowseName

SNReturnUnallocated

IsAbstract

True

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

0:HasProperty

Variable

InputArguments

Argument[]

0:PropertyType

Mandatory

0:HasProperty

Variable

OutputArguments

Argument[]

0:PropertyType

Mandatory