Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Counter controlled counter
Patent
1981-06-26
1984-03-06
Chin, Gary
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Counter controlled counter
377 26, 364900, H03K 2130
Patent
active
044358270
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a read clock pulse controller for applying read clock pulses to a read-only sequence controller having an EPROM in an output relay unit.
BACKGROUND ART
A conventional sequence controller has a writing means and a reading means. However, the writing means is not used after a necessary data has been written in. Therefore the sequence controller having the writing means which is scarcely used is very unreasonable and expensive. In order to remove such disadvantages, it should be attempted to provide a sequence controller having a single function.
DISCLOSURE OF THE INVENTION
In accordance with the present invention, the sequence controller is divided into a write-only sequence controller and a read-only sequence controller. The write-only sequence controller is provided for writing data in an EPROM or MASK ROM to be attached thereto. The read-only sequence controller is adapted to mount the EPROM or ROM and to produce an output of the data in the EPROM or ROM.
Since data may be written in a plurality of EPROMs by one write-only sequence controller, an economical control system may be provided. Accordingly, only one write-only sequence controller can be used for writing data in EPROMs for a plurality of read-only sequence controllers, even if 1000 units of read-only sequence controller.
Further, the read-only sequence controller is divided into
(A) an output relay control unit, and
(B) a read clock pulse control unit.
The output relay control unit has an output relay unit to which the EPROM is attached. By applying read clock pulses to the output relay unit, the output is produced from the output relay unit.
A standard EPROM of the read-only sequence controller of the present invention is a type of N words.times.8 bits and the output relay comprises eight units.
Designating the read-only sequence controller as A and the read clock pulse controller as B, parallel 8-process outputs are obtained by A+B, 16-process outputs are obtained by 2A+B, 24-process by 3A+B, 32-process by 4A+B and 80-process by 10A+B. As will be seen, increase of the process may be achieved by just increasing the number of A.
The read-only sequence controller of the present invention may be made into a light device having a weight of 280 g and into a compact size. Thus, economical control may be provided for automatization of machine and for energy saving.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a plan view of a read clock pulse controller according to the present invention;
FIG. 2 shows a perspective view of the controller;
FIG. 3 shows a cross sectional view of the controller;
FIG. 4 shows a circuit of a read clock pulse controller;
FIG. 5 shows a circuit of contact relay system connected to the read clock pulse controller of the present invention;
FIG. 6 shows a circuit of contactless relay system; and
FIG. 7 shows a perspective view of a read-only sequence controller connected to the read clock pulse controller of the present invention.
BEST MODE FOR EMBODYING THE INVENTION
Referring to FIG. 1, a case of the read clock pulse controller comprises panel plates 1 and 2 and a pair of covers 3 made of metal plate. Preset code switches 4 and 5 display 2 digits of two figures as the sequence cycle time. Numeral 6 is a cycle time select switch, 7 is a start switch, 8 is a stop switch. A ribbon cable 9 is connected to an outside output relay unit through a connector 10. Numeral 11 is a pilot lamp. A connector 12 is connected to a supply voltage DC. An abnormality detecting connector 13 is connected to an outer abnormality detecting circuit. An auto-start connector 14 is connected to an outside remote controller and an auto-stop connector 15 is connected to the outside remote controller. A connector 16 is connected to an outside remote control manual start switch. A connector 17 is connected to an outside remote control manual stop switch. Numeral 18 designates a reset switch. When a changeover switch 19 is turned OFF, one cycle of operation is done, while the switch 19 is turned
REFERENCES:
patent: 3141153 (1964-07-01), Klein
patent: 3683159 (1972-08-01), Welch et al.
patent: 4155037 (1979-05-01), Mazur
"Single Counter Controlled Buffer", by Dunn et al., Published in IBM Technical Disclosure Bulletin, vol. 20, No. 5, Oct. 1977, pp. 1702-1703.
Chin Gary
Roberts John T.
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