This OPC UA MachineModuleHistoricalRecordType ObjectType contains the specifications of the machine module that have been valid in the past. When the machine module manufacturer modifies the machine in a way that impact the OPC UA server specification, the machine module manufacturer will save an object of type MachineModuleHistoricalType to the organising folder PastSpecificationRecords which is a component of the relevant MachineModule.

Figure 13 shows an overview for the MachineModuleHistoricalRecordType with related Objects. It is formally defined in Table 25.

Figure 13 – MachineModuleHistoricalRecordType overview