The ToolChangePrognosisType is a prognosis indicating at which time in the future a tool within the machine tool or a magazine shall be exchanged with a similar tool (usually due to wear).

The ToolChangePrognosisType is formally defined in Table 63.

Table 63 – ToolChangePrognosisType Definition

Attribute	Value
BrowseName	ToolChangePrognosisType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the PrognosisType defined in 8.6.4 i.e. inheriting the InstanceDeclarations of that Node.
0:HasComponent	Variable	Location	0:LocalizedText	0:BaseDataVariableType	M, RO
0:HasComponent	Variable	ToolIdentifier	0:String	0:BaseDataVariableType	O, RO
0:HasComponent	Variable	ToolName	0:String	0:BaseDataVariableType	O, RO
0:HasComponent	Variable	ToolNodeId	0:NodeId	0:BaseDataVariableType	O, RO

Location refers to the place the tool shall be removed from within the machine tool’s system boundary, e.g. a tool magazine or the workspace of the machine tool.

ToolIdentifier is identical to the Identifier property of the tool to change, if applicable. If the tool is not modelled in the AddressSpace of the OPC UA Server, this component shall be filled accordingly.

ToolName contains the name of the tool to change, as described for the BaseToolType in 8.5.3. If the tool is not available in the AddressSpace, the ToolName shall be given in a similar manner.

ToolNodeId is the NodeId of the BaseToolType subtype instance this prognosis refers to.