Programmable sequence controller

Details Programmable sequence controller Programmable sequence controller

1974-07-03

1976-12-07

Malzahn, David H.

Communications: electrical

Digital comparator systems

G05B 1132

Patent

active

039965651

ABSTRACT:
A sequence controller comprising a logic operation circuit for examining an external input with an examine command in accordance with a program. The logic operation circuit comprises block means for discontinuing a next examination of a logical function of a group of logical functions in response to a preceeding examination result of a logical function to thereby execute a logic operation non-sequentially.

REFERENCES:
patent: 3686639 (1972-08-01), Fletcher et al.
patent: 3753243 (1973-08-01), Ricketts, Jr. et al.
patent: 3806714 (1974-04-01), Otsuka et al.
patent: 3810118 (1974-05-01), Kiffmeyer
patent: 3849765 (1974-11-01), Hamano
G. Lapidus, "Programmable Logic Controllers--Painless Programming to Replace the Relay Bank," Control Engineering, Apr. 1971, pp. 49-60.
N. Andreiev, "Programmable Logic Controllers--An Update," Control Engineering, Sept. 1972, pp. 45-47.

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