Patent
1996-11-29
1999-07-13
Sheikh, Ayaz R.
395854, G06F 1300
Patent
active
059239034
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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Alvarez-Escurra Jorge
Baraston Henry
Beck Fran.cedilla.ois
Perotto Marie-Christine
Schneider Automation
Sheikh Ayaz R.
Thai Xuan M.
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