Diagnostic method for production line

Details Diagnostic method for production line Diagnostic method for production line

1994-07-01

1995-04-25

Voeltz, Emanuel T.

Boots, shoes, and leggings

364550, 364184, G05B 104

Patent

active

054104696

ABSTRACT:
A diagnostic method for a production line. The production line is in accordance with a ladder program, which is prepared on the basis of a map describing the operations of equipment composed of a plurality of drive devices. The method comprises the steps of: storing reference operation times necessary for executing the respective operations of the program elements of the ladder program; comparing the time it has actually taken a change to take place in the ON/OFF condition of each of confirmation devices for confirming the operations of the drive devices with the corresponding reference operation time; and locating, on the basis of the results of this comparison, any malfunctioning point of the production line.

REFERENCES:
patent: 4456960 (1984-06-01), Wakai
patent: 4802094 (1989-01-01), Nakamura et al.
patent: 4965742 (1990-10-01), Skeirik
patent: 5006976 (1991-04-01), Jundt

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