FDT (Field Device Tool) technology standardizes the communication interface between field devices and systems. The special advantage of this technology is that its function is independent of the communication protocol and independent of the software environment on the device and on the control system. FDT therefore allows you to address any device via any system using any protocol.

Device Type Manager (DTM)

A device manufacturer develops a new Device Type Manager (DTM) for each device or group of devices. The DTM can be created directly from the device description (DD) if one is available. The DTM contains all device-specific data, functions and operating rules, such as the device structure, available communication options, internal dependencies, and human-machine communication capabilities. The DTMs have functions for reading device parameters, for configuring and operating devices, as well as for detecting errors. DTMs can consist of a simple graphical user interface (GUI) for setting the device parameters, or take the form of a highly developed application that, for example, performs complex real-time calculations for diagnostics and maintenance.

PROFIBUS specifications

Current PROFIBUS specifications include the following: PROFIBUS DP (DP = Decentralized Peripherals) for high-speed data exchange, e.g. with FUs, remote I/Os, analysis devices, etc. (V0, V1, and V2 specifications exist). PROFIBUS PA (PA = Process Automation) was developed for the demands of process automation (sensors, actuators) and covers EEx requirements. Fieldbus supply and communication is handled with 2-line technology. Various device profiles (Profile 3.0) exist for PA devices (e.g. pressure, temperature, etc.).