Sequence controller and control method
OwnerKenji Sakakibara, Toshihiro Takenaka +1inventors
InventorsKenji Sakakibara, Toshihiro Takenaka, Michiyasu Kurihara
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Abstract
A programmable logic controller having a data holding unit for storing operation data for instructing operations and condition data for the operations in accordance with a predetermined sequence, having a variable control unit for generating operation instruction signals from the operation data in accordance with a predetermined sequence, and controlling a system for successive operation when conditions defined by the condition data and conditions input from sensors of the control system match.
Claims11
A sequence controller for system control provided with a data holding unit and a control unit, wherein:
- said data holding unit stores operation data instructing operations and condition data for causing said operations in accordance with a predetermined sequence, and
- said control unit generates operation instruction signals for instructing said operations from said operation data in accordance with a predetermined sequence and executes said operations when conditions defined in said condition data are satisfied.
A system control method having a plurality of steps, data of each step having operation data instructing operations and condition data for said operations, comprising:
- a step of generating operation instruction signals from said operation data and
- a step of causing operation of said system by said operation instruction signals when said condition data and data obtained from said system match.
A control system provided with:
- a data preparation/input device for preparing operation data for causing operation in accordance with a predetermined sequence and condition data for causing said operation as numerical data,
- a programmable logic controller having a data holding unit for storing numerical data input from said data preparation/input device and a control unit, and
- a production system having various types of sensors,
- said programmable logic controller generating operation instruction signals from said operation data and causing operation of said production system when said condition data matches with data from detection signals from said sensors.
A programming method for producing a program for a programmable logic controller, comprising:
- a step of forming steps of processing comprised of a plurality of steps by operation data and operation condition data for that operation based on operation routines,
- a step of storing said operation data and said operation condition data as numerical data in accordance with said operation routines, and
- a step of converting said numerical data to data for each slot of said programmable logic controller.
Dependencies are inferred from the claim text.