Read-only sequence controller

Details Read-only sequence controller Read-only sequence controller

1993-11-12

1994-10-18

Ruggiero, Joseph

Boots, shoes, and leggings

364140, 364184, 377 16, G05B 1101, G06F 1546

Patent

active

053574222

ABSTRACT:
A read-only sequence controller has a main circuit and a sub-circuit operated by a command signal from the main circuit at a predetermined cycle time. The cycle time of the main circuit is longer than the sub-circuit in order to control the sub-circuit. A sensor is provided on an outlet of a machine for detecting a discharge of a work at every cycle end and producing a discharge signal which is fed to the sub-circuit. In normal operation, the sub-circuit is re-started in response to the discharge signal and the command signal from the main circuit. When abnormality occurs, the sensor does not produce the discharge signal. In response to absence of the discharge signal and to the command signal, a stop control circuit produces stop signals to stop the main circuit and the sub-circuit.

REFERENCES:
patent: 3829842 (1974-08-01), Langdon et al.
patent: 4107779 (1978-08-01), Fisk et al.
patent: 4815112 (1989-03-01), Kuze
patent: 4827396 (1989-05-01), Taniguchi

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