Boots – shoes – and leggings
Patent
1988-10-28
1990-10-23
Ruggiero, Joseph
Boots, shoes, and leggings
371 81, 371 101, G05B 2302, G06F 1116
Patent
active
049657143
ABSTRACT:
A process control system includes a processor which outputs command signals to a plurality of field devices via an interface unit. The interface unit comprises a primary output unit for outputting a first set of the command signals to the field devices in response to a first control signal. The first set of command signals are command signals for normal operation of the process control system. A secondary output unit outputs a second set of the command signals to the field devices in response to a second control signal. The second set of command signals are command signals for a failure mode of operation of the process control system. The second set of command signals are temporarily stored by the secondary output unit in order to respond quickly upon detection of an error.
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patent: 4141066 (1979-02-01), Keiles
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patent: 4437154 (1984-03-01), Eisele et al.
patent: 4642753 (1987-02-01), Easthill
patent: 4691315 (1987-09-01), Murphy et al.
Genius.TM. I/O System, pp. 3-1-4-22, Mar. 1986.
Short--"Microprocessors and Programmed Logic", Prentice-Hall, Inc., 1981, p. 32.
Honeywell Inc.
Lenkszus D. J.
Medved A.
Ruggiero Joseph
Sapelli Arthur A.
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