Control unit, data refresh method, and data refresh program
AssigneeOMRON Corporation
InventorsTatsuya KOJIMA, Koji YAOITA, Katsushige OHNUKI
Life of this patent
Estimating the term…
Abstract
A control unit includes: a memory; a computation control part; and an input and output unit for connecting the computation control part to a device of an (FA) system. A system program includes a data refresh program for executing a data refresh of data of the device and the control data of the memory via the input and output unit. If the computation control part receives a change of a control program, the computation control part stops executing the control program. The computation control part executes the change of the control program while executing a part of the system program including the data refresh, and resumes executing the control program.
Claims4
A control unit comprising:
- a memory that stores a system program, a control program, and control data;
- a computation control part configured to execute the system program and the control program with reference to the control data;
- and
- an input and output unit connecting the computation control part to a device of a factory automation (FA) system, wherein,
- the system program comprises a data refresh program for executing a data refresh of the control data of the device and the memory via the input and output unit, and
- the computation control part is configured to perform operations comprising:
- stopping executing the control program, if the computation control part receive a change of the control program,
- executing the change of the control program while executing a part of the system program comprising the data refresh program, and
- resuming executing the control program.
A data refresh method, comprising:
- executing a system program and a control program with reference to control data;
- receiving a change of the control program;
- stopping executing the control program by receiving the change of he control program;
- executing the change of the control program while executing a part of the system program comprising a data refresh program of the control data;
- and
- resuming executing the control program.
A non-transitory computer-readable recording medium storing a data refresh program, which when read and executed for causing a computation control part to execute operations comprising:
- executing a system program and a control program with reference to control data;
- receiving a change of the control program;
- stopping executing the control program by receiving the change of the control program;
- executing the change of the control program while executing a part of the system program comprising a data refresh program of the control data;
- and
- resuming executing the control program.
Dependencies are inferred from the claim text.