Error control apparatus using restore memory for recovering from

Details Error control apparatus using restore memory for recovering from Error control apparatus using restore memory for recovering from

1987-09-28

1989-09-05

Williams, Jr., Archie E.

Boots, shoes, and leggings

364184, 36492693, 3649447, 3649448, 3649456, 371 494, 371 671, 371 683, 34082516, G06F 1110, G06F 1546

Patent

active

048645311

ABSTRACT:
An input/output device monitors the transmission of information between a processor of a programmable controller and sensors and actuators of a process to be controlled. This device includes electronic circuits adapted for calculating the parities of the digital words which pass therethrough, these parities being compared with corresponding parities calculated by the processor which thereafter invalidates the words having two different parities.

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patent: 4556958 (1985-12-01), Ugon

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