Field device and method for transferring the field device's signals

Abstract

The present invention provides a field device whereby the device's additional information can be transmitted wirelessly without the need for battery replacement or external wiring. The present invention also provides a field device whereby the firmware of a wireless module in the field device can be developed at minimum cost and whereby it can be made easy to link the firmware to applications, such as an asset management system, on the host system side. The field device in accordance with the present invention is installed in a plant, factory, or the like, connected to a higher-order distributed control system through a signal line, configured to input or output 4-20 mA signals, and comprised of: an RF unit for transmitting or receiving radio signals; and a power supply block for accumulating extra electric currents when the block is neither transmitting nor receiving radio signals; wherein electric currents accumulated in the power supply block are supplied to the RF unit so as to be used as electric power for transmitting or receiving radio signals.

Dependencies are inferred from the claim text.