초록 ▼

A field apparatus which allows for migration from an analog signal transmission system to a field bus transmission system without a need to change the configuration of the field apparatus and performs a self diagnosis. The field apparatus includes a receiving unit which receives a field bus oriented

A field apparatus which allows for migration from an analog signal transmission system to a field bus transmission system without a need to change the configuration of the field apparatus and performs a self diagnosis. The field apparatus includes a receiving unit which receives a field bus oriented signal from another apparatus connected to the transmission line, an analog signal transmitting unit which transmits a measured magnitude of a measurement object through the transmission line as an analog signal, a field bus signal transmitting unit which transmits a measured magnitude of a measurement object through the transmission line as a field bus oriented signal, and a switch which selects either the analog signal transmitting unit or the field bus signal transmitting unit which transmits an analog signal or a field bus oriented signal respectively through the transmission line.

대표청구항 ▼

[ I claim:] [1.] A field apparatus, connected to a transmission line, for communicating with another apparatus connected to said transmission line, comprising:an analog signal transmitting unit which transmits a measured magnitude of a measurement object through said transmission line as an analog s

[ I claim:] [1.] A field apparatus, connected to a transmission line, for communicating with another apparatus connected to said transmission line, comprising:an analog signal transmitting unit which transmits a measured magnitude of a measurement object through said transmission line as an analog signal;a receiving unit which receives a field bus oriented signal from another apparatus connected to said transmission line;a field bus signal transmitting unit which transmits a measured magnitude of said measurement object through said transmission line as a field bus oriented signal; anda switch which selects either said analog signal transmitting unit or said field bus signal transmitting unit which transmits an analog signal or a field bus oriented signal respectively through said transmission lines,wherein said switch selects said field bus signal transmitting unit which transmits a field bus oriented signal through said transmission line when a field bus oriented signal is received by said receiving unit from another apparatus connected to said transmission line.