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US 6,897,675 B2Granted
System and method for device sequencing using discrete PLC control
AssigneeElectronic Data Systems Corporation
InventorsKevin A. Donley, Wesley O. Hamilton
Life of this patent
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Abstract
A system and apparatus for discrete PLC control using word sequences in a data table for controlling a device on an assembly line. The data table contains sequencing information which defines, for each station on the line, a series of operations with corresponding setup and operation parameters. By placing the sequencing information in a data table, programming or changing the series of operations for a PLC is made much more simple and efficient.
Claims22
A method for operating a programmable-logic-controller controlled device, comprising:
- providing a programmable logic controller having at least one input and at least one output;
- providing a data table, stored in a computer-readable medium, readable by the programmable logic controller;
- reading a first word from the data table;
- performing an operation at a first station, controlled by the programmable logic controller, according to the contents of the first word.
1 more element
An apparatus, comprising:
- a programmable logic controller having at least one input and at least one output;
- a data table, stored in a computer-readable medium, readable by the programmable logic controller;
- at least one device connected to be controlled by the programmable logic controller;
- and
- at least one word stored in the data table;
- wherein the word defines a device operation and corresponding operation parameters.
3 more elements
Dependencies are inferred from the claim text.