Method of maintaining 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:
- locating, on the memory cartridge, a first head marker relatable to a first data log record, the first head marker indicative of a beginning memory segment for a second data log record to be written;
- and
- writing the second data log record to at least the beginning memory segment, the second data log record corresponding to a data log file structure stored separately from a corresponding data log file on the memory cartridge, the data log file structure structurally defining the data log file and comprising a symbolic representation of how the data log file is formatted for storage and retrieval, the data log file structure stored as part of a projectile, the project file further comprising a PLC program and a recipe structure.
A method comprising a plurality of activities comprising:
- on a memory cartridge connected to a programmable logic controller (PLC), writing a first data log record to at least a beginning memory segment of the memory cartridge, the memory cartridge comprising a plurality of memory segments, the first data log record corresponding to a data log file structure stored separately from a data log file on the memory cartridge, the data log file structure structurally defining the data log file and comprising a symbolic representation of how the data log file is formatted for storage and retrieval, the data log file structure stored as part of a project file, the project file further comprising a PLC program and a recipe structure, the beginning memory segment located via a first head marker relatable to a second data log record, the first head marker indicative of the beginning memory segment.
A machine-readable medium comprising computer-executable instructions for activities comprising:
- locating, on a memory cartridge connected to a programmable logic controller (PLC), a first head marker relatable to a first data log record, the first head marker indicative of a beginning memory segment for a second data log record to be written, the memory cartridge comprising a plurality of memory segments;
- writing the second data log record to at least the beginning memory segment, the second data log record corresponding to a data log file structure stored separately from a corresponding data log file on the memory cartridge, the data log file structure structurally defining the data log file and comprising a symbolic representation of how the data log file is formatted for storage and retrieval, the data log file structure stored as part of a project file, the project file further comprising a PLC program and a recipe structure;
- creating a second head marker relatable to the second data log record;
- and
- changing the first head marker to be a non-head marker.
Dependencies are inferred from the claim text.