Sequence display controlling method and controller

Details Sequence display controlling method and controller Sequence display controlling method and controller

1979-09-13

1982-02-16

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 3153, G06F 906

Patent

active

043162606

ABSTRACT:
A programmable sequence controller is provided with a display signal processor for preparing and correcting a sequence program in combination with a CRT (or cathode ray tube) display device. The signal processor simply effects signal processing of branch points and composition points in case where a so-called "ladder diagram" constituting the sequence diagram with relay symbols is prepared and displayed. Branch information is stored in an FIFO (or first in first out) register. The branch information is sequentially received and stored, and the information thus stored is read out in the order of storage, thus preparing the ladder diagram. There are provided a register for instructing the FI operation and a register for instructing the FO operation. The sequence display controller is applicable to the cases where a new ladder diagram is to be prepared, the diagram once prepared is corrected, and the operation is checked.

REFERENCES:
patent: 3686639 (1972-08-01), Fletcher
patent: 3944987 (1976-03-01), Koyanagi et al.
patent: 3964026 (1976-06-01), Yamauchi et al.
patent: 3965457 (1976-06-01), Harwood
patent: 3982230 (1976-09-01), Burkett
Saba, R. T., Pushbutton Wiring Replaces Relays (IGA/1971 Sixth Annual Meeting of the IEE Ind. & Gen'l Appli. Group.), pp. 1043-1051).

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