Title:
PROGRAM CONTROLLER
Document Type and Number:
Japanese Patent JPS5557906
Kind Code:
A
Abstract:
PURPOSE:To make it possible to write input-output conditions in a memory definitely and automatically by providing a comparator which detects a control result signal changing and also makes a step counter count up. CONSTITUTION:Comparator 10 is provided. The output signal of a limit switch outputs control result signal S of ''1'' from 1st input selector 3 and S of ''1'' is compared by comparator 10 with input condition signal PIN outputted from memory 5. In this case, since a previous state, i.e. a signal of ''0'' is stored as PIN in the 1st step of memory 5, PIN one cycle before is being read out and S and PIN become ''1'' and ''0'' respectively to output ''1'' from output terminal OUT1 of comparator 10. In the next cycle, S of ''1'' is written as PIN in memory 5 and an output ''1'' from OUT1 makes step counter 11 count up through AND gate 14 for addressing to the 2nd step.
Inventors:
TOTSUKA TADAO
Application Number:
JP13080678A
Publication Date:
April 30, 1980
Filing Date:
October 24, 1978
Export Citation:
Assignee:
TOTSUKA TADAO
International Classes:
G05B19/05; G05B15/02; G05B19/02; (IPC1-7): G05B15/02; G05B19/02; G06F15/46
Previous Patent: JPS5557905
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