System and method for universal extensibility that supports a plurality of programmable logic controllers
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United States of America Patent
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Jul 21, 2009
Grant Date -
May 20, 2004
app pub date -
Sep 19, 2003
filing date -
Sep 26, 2002
priority date (Note) -
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Abstract
A method and system is provided for creating applications for one or more types of programmable logic controllers (PLCs). A open development kit (ODK) is provided that permits dynamic link libraries to be created and interfaced to a user application software and also to the interface layers of the various types of PLCs. The types of PLCs may include soft PLCs, slot PLCs, and hard PLCs and interface via slots of a personal computer platform. The ODK provides generic interfacing to the various types of PLCs and establishes the necessary operating environment structure to implement processing in either a non-real time and a real time mode. A single application package may then control and manage the various types of PLCs. Communication paths are provided from the PLCs to the ODK subsystem to the user application so that the application software is essentially indifferent to type of PLC involved.
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