Method regarding a data log related to a programmable logic controller (PLC)
AssigneeSiemens Industry, Inc.
InventorsMark Steven Boggs, Steven Michael Hausman, Temple Luke Fulton, William H. Johnson
Life of this patent
Estimating the term…
Abstract
Certain exemplary embodiments can provide a method for utilizing a memory cartridge connected to a Programmable Logic Controller (PLC). The memory cartridge can comprise a plurality of memory segments. The method can comprise a plurality of activities comprising: providing a default identifying stamp for records in a data log file, a structure for the data log file stored separately from the data log file in the memory cartridge, and obtaining a request to provide the data log file.
Claims19
A method for utilizing a memory cartridge connected to a programmable logic controller (PLC), the memory cartridge comprising a plurality of memory segments, the method comprising a plurality of activities comprising:
- providing a data log file to the memory cartridge, the data log file having a first head marker that is turned on and a second head marker that is turned on;
- comparing a first data log record on the memory cartridge identified by the first head marker and a second data log record on the memory cartridge identified by the second head marker using an error checking technique;
- and
- determining which of the first head marker and the second head marker is erroneous based on a result of the comparison of the first data log record and the second data log record using the error checking technique.
A method comprising:
- responsive to a power failure and based upon a data log structure, comparing a first data log record on a memory cartridge associated with a first marker to a second data log record on the memory cartridge associated with a second marker using an error checking technique, the first data log record and the second data log record being part of a data log file stored on the memory cartridge, the memory cartridge connected to a programmable logic controller (PLC), the memory cartridge comprising a plurality of memory segments, the data log structure stored separately from the data log file on the memory cartridge;
- and
- determining which of the first marker and the second marker is erroneous.
A non-transitory computer readable storage medium comprising computer-executable instructions for activities comprising:
- responsive to a power failure and based upon a data log structure, comparing a first data log record on a memory cartridge associated with a first marker to a second data log record on the memory cartridge associated with a second marker using an error checking technique, the first data log record and the second data log record being part of a data log file stored on the memory cartridge, the memory cartridge connected to a programmable logic controller (PLC), the memory cartridge comprising a plurality of memory segments, the data log structure stored separately from the data log file on the memory cartridge;
- determining which of the first marker and the second marker is erroneous;
- and automatically reading the data log file, said reading activity subsequent to a received user input regarding an option to erase the data log file after the reading activity, the user input received responsive to a prompt.
Dependencies are inferred from the claim text.