Programmable logic controller inputs-outputs system
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United States of America Patent
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Jul 13, 1999
Grant Date -
N/A
app pub date -
Nov 29, 1996
filing date -
Nov 30, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a programmable logic controller inputs-outputs system comprising a processing unit (CPU) provided with a memory (M1, M2, M3) and at least one inputs-outputs coupler (C1 or C2 or C3 or C4) provided with a coupler memory (Mc) and forming the link between sensors and pre-actuators and the processing unit (CPU) characterized in that exchanges between the processing unit memory and each coupler memory are structured by logical channels carrying out a job function and grouping all or some physical channels of a coupler and in that the memory (M2) of the processing unit (CPU) contains objects related to each logical channel that form a data structure with standardized contents, these objects being exchanged with the coupler memory (Mc) through a user program by means of an instruction set.
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