Control system having effective error detection capabilities

Details Control system having effective error detection capabilities Control system having effective error detection capabilities

1997-07-14

1999-11-09

Grant, William

Boots, shoes, and leggings

714736, 701 43, G05B 902, G06F 1100

Patent

active

059800810

ABSTRACT:
A monitoring process of a subordinate CPU executes a monitoring subroutine based on external data to check if a main CPU is operating properly or not. A ROM stores test input data for the monitoring subroutine and reference data that should be obtained by the monitoring subroutine based on the test input data. The subordinate CPU alternately executes the monitoring process and a logic determination process which executes the monitoring subroutine based on the test input data. When the monitoring subroutine gives results different from the reference data, the logic determination process determines that there is an abnormality in the monitoring subroutine.

REFERENCES:
patent: 4049957 (1977-09-01), Kera et al.
patent: 4503536 (1985-03-01), Panzer
patent: 5144230 (1992-09-01), Katoozi et al.
patent: 5157780 (1992-10-01), Stewart et al.
patent: 5259473 (1993-11-01), Nishimoto

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