This section provides an overview of the OPC UA information model for wireless machine tool peripherals (WMTP). The information model for WMTP provides the ObjectTypes, VariableTypes and Methods required to map the Industrial Measurement Devices standard for WMTP. When using this OPC UA information model, the user is not bound to the Industrial Measurement Devices standard for WMTP.

The resulting data of a WMTP, as well as the methods to be executed on it, are assigned to the respective FolderType Objects.

The FolderType DeviceConfiguration provides methods and variables relating to the configuration of a WMTP. In addition to WMTP identification data, the DeviceInformation FolderType object also provides information on the battery level and information on the device license and life cycle, for example.

The FolderType Measurements contains all measured values actually recorded by the WMTP. Depending on the application, a WMTP can potentially record a large number of different measured values. First and foremost, these are explicitly temperature, rotation speed, humidity, acceleration and vibration, applied force, torque, the position of a reference point and the dimension. All these measurements can be implemented with one developed ObjectType for measurements, called WMTPMeasurementType. Instances of these measurements shall be located in the FolderType Measurements. The WMTPMeasurementType is a subtype of the ProcessValueType defined in “OPC UA for Machinery – Part 2: Process Values” (OPC 40001-2).

With the use of the two ObjectTypes WMTPWorkCycleDateType and WMTPServiceCycleDataType, desired data and service records can be transferred or deleted from the WMTP. The data is sent by the WMTP to the Client in response to the method used, the data is not stored to a specific node of the information model.

On Figure 6 you can see an overview of the WirelessMachineToolPeripheralType.

Figure 6 – Wireless Machine Tool Peripheral information model overview