Control method for automatic gathering of status data for distributed type remote I/O control system at start-up
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United States of America Patent
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Oct 13, 1998
Grant Date -
N/A
app pub date -
Jan 5, 1996
filing date -
May 26, 1995
priority date (Note) -
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Abstract
A basic system of an NC unit and a distributed type remote I/O unit executes time division signal transaction through a half-duplex serial communication line, and in case where the distributed type remote I/O can not detect a receiving start state of a transmission frame from the basic system of the NC unit for a specified period of time, output is reset, and the basic system of the NC unit checks a type of and data setting in the distributed type remote I/O unit, and also checks a result for an input/output test and the current situation of communication according to a header pattern of a transmission frame.
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