Devices, systems, and methods regarding a PLC system fault
First Claim
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1. 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.
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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.
48 Citations
19 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. 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.
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19. 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.
Specification