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 WwEventsDispatcherType ObjectType Definition
7.12 IWwEventMessageType InterfaceType Definition
7.13 WwEventCategoryEnumeration
7.14 WwMessageArgumentDataType
7.15 WwMessageArgumentValueDataType
7.16 WwBaseEventType ObjectType Definition
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.
Link to related chapter:
7.10 IWwUnitValuesType InterfaceType Definition