Data processing: generic control systems or specific application – Generic control system – apparatus or process – Plural processors
Reexamination Certificate
2006-09-07
2008-11-04
Mis, David (Department: 2817)
Data processing: generic control systems or specific application
Generic control system, apparatus or process
Plural processors
C700S067000, C710S001000, C332S100000
Reexamination Certificate
active
07447552
ABSTRACT:
An automation device is disclosed, in which a multiplicity of physically distributed functional units communicate with each other by means of a common transmission protocol. The device has a microcontroller (110), which has a group of associated input/output connections which are connected to a resistor network. The resistances of the resistors follow a sequence, the resistance respectively being doubled from the less significant to the next most significant bit. Each input/output connection is actively switched to the associated logic level in order to output a first logic state and is connected as a high-impedance input in order to output the inverse, second logic state.
REFERENCES:
patent: 4549044 (1985-10-01), Durham
patent: 5233642 (1993-08-01), Renton
patent: 6278357 (2001-08-01), Croushore et al.
patent: 6307490 (2001-10-01), Litfin
Kresse Heiko
Schaeffer Ralf
Stelter Andreas
ABB Patent GmbH
Mis David
Prewitt Michael G.
Rickin Michael M.
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