Method and apparatus for partially running a sequence program fo

Details Method and apparatus for partially running a sequence program fo Method and apparatus for partially running a sequence program fo

1991-02-08

1993-06-08

Ruggiero, Joseph

Boots, shoes, and leggings

364184, 364DIG1, 364221, 3642664, 36426791, 364DIG2, 3649269, 364949, 371 165, 371 291, 395275, 395575, G06F 1546, G05B 2302

Patent

active

052185257

ABSTRACT:
A method and apparatus for debugging a sequence program by partially running the program by a programmable controller. The programmable controller includes memory to store the sequence program and memory to store partial run conditions comprising identity of a external device required for a partial run of the sequence program, a device access method and relevant data. An external i/o device interfaces with the programmable controller to store the partial run condition. The programmable controller includes a compare circuit for comparing the stored partial run conditions and the status of the program during a partial run. The comparison circuit outputs a signal which stops the run when the result of the sequence program operation is identical with the stored partial run conditions. The stop step and number of scans of the sequence program at the time the match is identified can be output for example, on a display.

REFERENCES:
patent: 4542452 (1985-09-01), Fukai et al.
patent: 4608628 (1986-08-01), Saito et al.
patent: 4851985 (1989-07-01), Burror et al.
patent: 4852047 (1989-07-01), Lavalee et al.
patent: 5068778 (1991-11-01), Kosem et al.
patent: 5070476 (1991-12-01), Fujiwara
Electronic Design, vol. 34, No. 28, Nov. 27, 1986, Hasbrouck Heights, N.J., USA, pp. 125-128; Bruce Ableidinger: "Software analyzers team up to track down complex bugs", p. 126, right col. lines 15-20.

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