Boots – shoes – and leggings
Patent
1994-04-04
1998-08-11
Kim, Kenneth S.
Boots, shoes, and leggings
36447403, 36447411, 36447416, 39518313, 39518314, 395551, 395704, G06F 1134
Patent
active
057939470
ABSTRACT:
The present invention provides a programmable controller for executing an SFC program. The programmable controller has a memory which stores a step trace program for storing and tracing a history of execution statuses of active steps of a plurality of blocks of an SFC during execution of the SFC program. The step trace program comprises a step trace setting subprogram which, through the use of a peripheral device, synchronously traces the execution statuses of the active steps of the plurality of blocks. The step trace program further comprises a step trace execution subprogram which creates step trace data based on the execution statuses of active steps traced by the step trace setting device. The programmable controller further comprises a step trace display device for displaying the step trace data. Hence, an operator can simultaneously view the execution status of active steps of a plurality of blocks of the SFC to thereby determine which active steps have been executed at any given time.
REFERENCES:
patent: 5047919 (1991-09-01), Sterling et al.
patent: 5168554 (1992-12-01), Luke
patent: 5426730 (1995-06-01), Miyake et al.
patent: 5438574 (1995-08-01), Taniguchi
Kim Kenneth S.
Mitsubishi Denki & Kabushiki Kaisha
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