Analog conversion device and programmable controller system
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United States of America Patent
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May 10, 2016
Grant Date -
Sep 17, 2015
app pub date -
Oct 28, 2012
filing date -
Oct 28, 2012
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
An analog conversion device includes an analog-to-digital (A/D) converter; a shared memory that has an A/D conversion-value storage area for storing the converted digital value and a log storage area for logging a digital value that is stored in the A/D conversion-value storage area and that can be read and accessed from a central processing unit (CPU) that controls an entire programmable controller; a logging execution unit that stores the digital value stored in the A/D conversion-value storage area in the log storage area as logging data; a fixed-number logging detection unit that monitors whether the number of the logging data to be stored in the log storage area has reached a predetermined number since the last interrupt generation request has been made; and an interrupt generation unit that makes an interrupt generation request to the CPU when the number of the logging data has reached the predetermined number.
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