Programmable logic controller having program for designating add

Details Programmable logic controller having program for designating add Programmable logic controller having program for designating add

1995-05-23

1998-01-27

Meky, Moustafa M.

Boots, shoes, and leggings

364140, G06F 1576

Patent

active

057130361

ABSTRACT:
A programmable logic controller capable of freely and sequentially controlling peripheral equipment without modifying a system program. Necessary data for sequence control of the peripheral equipment are selected from data defined in the system program. The memory addresses corresponding to the data are assigned to addresses to be used in a user program in an address storage unit. The controller executes the system program to sequentially control an industrial machine, and also executes the user program to control the peripheral equipment. The controller refers to the data being used in executing the system program, which are necessary for sequence control of the peripheral equipment, based on the designated relationship of the addresses stored in the address storage unit. Since necessary data for sequence control of the peripheral equipment can be obtained by combining the addresses arbitrarily by the user, it is not necessary to modify the system program in order to obtain the necessary data for sequence control of the peripheral equipment.

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patent: 4827512 (1989-05-01), Hirokawa et al.
patent: 4853891 (1989-08-01), Wollscheid et al.
patent: 5008834 (1991-04-01), Mizumo et al.
patent: 5485552 (1996-01-01), Mizuno et al.

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