| 摘要 |
PROBLEM TO BE SOLVED: To provide a comparison redundancy type information processing apparatus for improving the reliability of operation data diagnosis without deteriorating the processing speed of the comparative determination of the data of two processing units. SOLUTION: The comparison redundancy type information processing apparatus includes: a first processing unit 10a and a second processing unit 10b that perform the same control program to the same input data in synchronization; an input/output unit 12 that generates the input data, and receives output data; and a channel selection unit 11 that sends the input data from the input/output unit to the processing units in parallel, and selects one from the output data to send the one to the input/output unit. Each of the processing units includes: a program memory 2a; a control cycle synchronization unit 6a that generates a control cycle signal; a processor 1a that performs the control program; a data memory 4a that stores operation data; a diagnostic unit 3a that comparatively determines whether the operation data match each other. The diagnostic unit compares summary information obtained by compressing the operation data with each other, and determines whether or not the summary information matches the other summary information, and outputs a determination signal to the channel selection unit 11. COPYRIGHT: (C)2011,JPO&INPIT
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