Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2007-10-23
2007-10-23
Beausoliel, Robert W. (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C700S021000
Reexamination Certificate
active
10663863
ABSTRACT:
A safety controller executes a control program in two processing units to detect processor failure by comparison of the execution in each unit. This comparison is made rapid by synchronizing the input variables at the beginning of the task and comparing output variables at a conclusion of the task, avoiding line-by-line comparison of input and output variables. Intermediate variables, that are neither input nor output values, are compared at a less frequent interval.
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Gibart Anthony Gerard
Izzo Joseph Paul
Kalan Michael Dean
Kucharski Paul G.
Rischar Charles Martin
Baxter Keith M.
Beausoliel Robert W.
Mehrmanesh Elmira
Rockwell Automation Technologies Inc.
Speroff R. Scott
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