Distributed input/output system

Details Distributed input/output system Distributed input/output system

1988-05-17

1989-09-26

Kemeny, Emanuel S.

Boots, shoes, and leggings

G06F 0305, G06F 1546

Patent

active

048705640

ABSTRACT:
The invention disclosed provides an intelligent input/output system for a programmable controller and includes a plurality of input/output (I/O) modules, each of which may be located in proximity to the process being controlled. Each module is interconnected, via a communications link, to a central processor unit (CPU) through an I/O controller. Each module is made up of a plurality of input/output circuits and each may be selectively operated as an input circuit or as an output circuit. The selection is preferably under control of the CPU. Each I/O module includes an operations control unit for controlling each I/O circuit and for providing an exchange of diagnostic and control signals between each I/O circuit and the I/O controller and CPU. Communications between the operations control unit and each I/O circuit is preferably carried out via a pair of conductors, one conductor of which conveys a set of recurring control signals (e.g., in signal frames) and the other of which conveys encoded diagnostic signals.

REFERENCES:
patent: 4095094 (1978-06-01), Struger et al.
patent: 4247882 (1981-01-01), Prager et al.
patent: 4253148 (1981-02-01), Johnson et al.
patent: 4293924 (1981-10-01), Struger et al.
patent: 4296464 (1981-10-01), Noods et al.
patent: 4381456 (1983-04-01), Saito et al.
patent: 4417151 (1983-11-01), Klein et al.
patent: 4424559 (1984-01-01), Lorincz et al.
patent: 4435706 (1984-03-01), Callan
patent: 4472783 (1984-09-01), Johnstone et al.
patent: 4490775 (1984-12-01), Quom
patent: 4500951 (1985-02-01), Sugimoto et al.
patent: 4742448 (1988-08-01), Ketelhut et al.
Data Sheets, RIFA Integrated Circuits PBD 3545 and PBD 3544, (2 pages each), RIFA-AB, Stockholm, Sweden.
"Smart ICs for Power Switching", Machine Design, May 10, 1984, pp. 60-65.
Digicable Manual, Direct Digital Industries, Inc., Lexington, KY.
Electronic Design, vol. 30, No. 19, pp. 69-82, 1982, The Analog World: Getting Faster and Smarter.
Natter, Jr., pp. 37-1 to 37-16, 1978, A Distributed Microprocessor Monitoring and Control System for Coal Mines.
FUJI Electr. Rev. (Japan), vol. 23, No. 1, 1977, Outline of FUJI Micro Control System.
Zaks, Microprocessor Interfacing Techniques, 3rd edition, 1979, pp. 61-63 and 66.
Imamura et al., pp. 20 to 27, 1978, Development of Automated Power System Management Techniques.

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