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The IODD (IO Device Description) describes sensors and actors. It contains information about the device’s identity, parameters, process data, diagnosis data, communication properties and the design of the user interface of engineering tools. The IODD comprises different data files: the main file and several optional language files are in XML-format and optional graphical files are in PNG-format (portable network graphics). ==Structure== The IODD structure conforms to the specifications of the standard ISO 15745 “Industrial automation systems and integration – Open systems application integration framework”. The IODD unifies the device profile and the communication network profile in one data file. According to the structure defined in ISO 15745, the IODD provides the objects DeviceIdentity and DeviceFunction for the device description. The DeviceIdentity object contains text with information for the user and identification numbers (IDs) to automatically identify sensors and actors in the plant. The IODD enables the vendor to describe variants of products, which are equal in their parameters, process and diagnosis data and communication but vary in their order number. In this way it is ensured that the high diversity of the mechanical characteristics, which characterize the sensors and actuators, will not result in an unnecessary high number of device descriptions and a high consumption of identification numbers. The DeviceFunction object is the recipient of any other information if these information do not belong to the communication profile. It contains the description of the device’s parameters, process data, diagnosis data and configuration of the user interface. The embedded communication network profile can be easily replaced and hence the IODD can be easily used to describe sensors and actuators with different communication interfaces. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IODD」の詳細全文を読む スポンサード リンク
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