Patent ID: 6075452
Filing Date: 2000-06-13
Classification: H02J

Abstract:
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.