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US 2008/0126882 A1Published application
Devices, systems, and methods regarding a PLC system fault
AssigneeSiemens Industry, Inc.
InventorsTemple L. Fulton, Lothar Trapp, Heiner Fuchs
Life of this patent
Estimating the term…
Abstract
Certain exemplary embodiments can comprise a method, which can comprise providing a signal indicative of a set single bit flag. The flag can be set for a scan cycle responsive to a detection of a fault in an Input/Output (I/O) device of a programmable logic controller (PLC) system or an I/O interface of the PLC system.
Claims19
A method comprising:
- providing a signal indicative of a set single bit flag, said flag set for a first scan cycle responsive to a detection of a fault in an Input/Output (I/O) device of a programmable logic controller (PLC) system or an I/O interface of said PLC system, said flag promptly reset at a conclusion of said first scan cycle, and, responsive to a determination that said fault has been cleared, said flag set for a second scan cycle, said flag promptly reset at a conclusion of said second scan cycle.
A machine-readable medium comprising machine instructions for activities comprising:
- providing a signal indicative of a set single bit flag, said flag set for a first scan cycle responsive to a detection of a fault in an Input/Output (I/O) device of a programmable logic controller (PLC) system or an I/O interface of said PLC system, said flag promptly reset at a conclusion of said first scan cycle, and, responsive to a determination that said fault has been cleared, said flag set for a second scan cycle, said flag promptly reset at a conclusion of said second scan cycle.
A system comprising:
- a circuit adapted to provide a signal indicative of a set single bit flag, said flag set for a first scan cycle responsive to a detection of a fault in an Input/Output (I/O) device of a programmable logic controller (PLC) system or an I/O interface of said PLC system, said flag promptly reset at a conclusion of said first scan cycle, and, responsive to a determination that said fault has been cleared, said flag set for a second scan cycle, said flag promptly reset at a conclusion of said second scan cycle.
Dependencies are inferred from the claim text.