The machines of different manufacturers shall be identifiable in a standardized manner. To realize this, a number of basic and static information like manufacturer name and model number are offered on the interface.
Links to related chapters:
7.1 Finding Woodworking Machines in a Server
7.2 WwMachineType ObjectType Definition
The machines of different manufacturers offer their states in a standardized manner.
Links to related chapters:
7.3 IWwStateType InterfaceType Definition
7.4 IWwSubUnitsType InterfaceType Definition
7.5 IWwBaseStateType InterfaceType Definition
7.6 IWwUnitOverviewType InterfaceType Definition
7.9 IWwUnitFlagsType InterfaceType Definition
The machine is expected to offer all current messages such as alarms, warnings and information over the interface. These errors and warnings shall be mapped to OPC UA event types accordingly.
Links to related chapters:
7.11 IWwEventMessageType InterfaceType Definition
7.12 WwEventCategoryEnumeration
7.13 WwMessageArgumentDataType
7.14 WwMessageArgumentValueDataType
7.15 WwBaseEventType ObjectType Definition
7.16 WwConditionType ObjectType Definition
7.17 WwAcknowledgeableConditionType ObjectType Definition
7.18 WwAlarmConditionType ObjectType Definition
7.19 WwEventsDispatcherType ObjectType
To facilitate the calculation of different KPIs like for example OEE, the interface offers different item values with their changing times. These times allow to calculate the durations of different machine modes.
All of these relevant times are transferred with OPC UA mechanisms. Each state change is sent to the OPC UA Client, and the timestamp can be used to calculate the time durations needed for KPI compilation.
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7.10 IWwUnitValuesType InterfaceType Definition
In order to calculate cycle times and prognoses for production by an external system, the interface provides the time data of start, end, interruption and abortion of machining processes and programs on the machine.
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7.20 Job-Order-Input and Job-Order-Response Information
Using the interface, an overview of the target and actual manufactured parts is possible. Additionally, it is possible to see which workpiece belong to which internal or customer order. If there is an irregularity in the process, which might affect the workpiece quality, the workpiece representation on the interface can be marked accordingly.
Link to related chapter:
7.20 Job-Order-Input and Job-Order-Response Information
A production manager wants to transfer and handle all necessary job data for a machine, i.e. transfer, modify, delete etc.
Link to related chapter:
7.20 Job-Order-Input and Job-Order-Response Information
The Woodworking interface makes use of OPC 40001-1. It provides the MachineryBuildingBlocks folder, directly referencing all Machinery Building Blocks used by the Woodworking interface instance. In addition, the Woodworking interface incorporates OPC 40001-3. This specification provides the use cases for job management.
Link to related chapter:
7.2 WwMachineType ObjectType Definition