Sequence controller including error correction and method theref

Details Sequence controller including error correction and method theref Sequence controller including error correction and method theref

1993-01-08

1996-01-16

Trammell, James P.

Boots, shoes, and leggings

364183, 364184, G05B 1101

Patent

active

054853664

ABSTRACT:
A sequence controller with error correction and a sequence controlling method are disclosed. The sequence controller is provided with a stop-time operation execution table, which stores stop-time execution step numbers and resumption-time execution step numbers. These step numbers correspond to step numbers at which a stop is expected to occur in a sequence control program for sequence-controlling a controlled object. According to the sequence controlling method, the execution of the sequence control program is stopped at the occurrence of an error, the stop-time execution step number corresponding to the stop-time step number is read from the stop-time operation execution table, a step having the step number read is executed, the resumption-time execution step number is read, and the execution is resumed from that step. As a result, error processing can be performed by only specifying a step number, the error processing need not be described in the program, and programs can be written, revised and reviewed easily.

REFERENCES:
patent: 4363092 (1982-12-01), Abo et al.
patent: 4638227 (1987-01-01), Katayama et al.
patent: 4930128 (1990-05-01), Suzuki et al.
patent: 4992928 (1991-02-01), Ishihara et al.
Patent Abstracts of Japan, vol. 9, No. 249 (M-419), Oct. 5, 1985 & JP-A-60 099 545, (Mitsubishi Jukogyo K.K.), Jun. 3, 1985, Abstract.
Patent Abstracts of Japan, vol. 10, No. 64 (P-436), Mar. 14, 1986 & JP-A-60 205 639, (Nippon Denki K.K.), Oct. 17, 1985, Abstract.

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