Communications: electrical – Continuously variable indicating – With meter reading
Patent
1998-02-06
2000-06-13
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
34087011, 34087018, 34087038, 370527, 370529, 370204, 375224, G05B 2302
Patent
active
060754524
ABSTRACT:
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.
REFERENCES:
patent: 4348673 (1982-09-01), Richardson
patent: 5469156 (1995-11-01), Kogure
patent: 5663985 (1997-09-01), Kogure
patent: 5835534 (1998-11-01), Kogure
Dalencourt Yves
Hitachi , Ltd.
Zimmerman Brian
LandOfFree
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