US 11,366,444 B2Granted

PLC device and control device

AssigneeFanuc Corporation

InventorsNao Onose, Mitsuru Mochizuki

Life of this patent

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Abstract

To enable acquisition of operation information of CNC corresponding to periodic operation of PLC, even when the CNC is unable to respond due to the timing of machining, the loading status, etc. The PLC device includes: a special instruction control unit that sets, to a special instruction for acquiring operation information indicating an operation state of a control device from the control device controlling an industrial machine, a cyclic time for causing the control device to periodically acquire and retain the operation information in a case in which the control device is unable to respond, and transmits to the control device the special instruction in which the cyclic time is set; and an acquisition unit that acquires the operation information acquired on the basis of the cyclic time from the control device.

Claims5

Dependent claims

A PLC device comprising:

a memory configured to store a program;
and
a processor configured to execute the program and control the PLC device to:
set, to a special instruction for acquiring operation information indicating an operation state of a control device from the control device controlling an industrial machine, a cyclic time corresponding to an operation of the PLC as an argument for causing the control device to acquire and retain, per the cyclic time, the operation information in a case in which the control device is unable to respond, and transmits to the control device the special instruction in which the cyclic time is set;
and
collectively acquire, at a time not related to the cyclic time, the operation information acquired and retained by the control device during the case in which the control device is unable to respond on the basis of the cyclic time from the control device, the acquired operation information having been transmitted from the control device to the PLC device during the case in which the control device is able to respond.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/871,219Filed 11 May 2020
Priority: JP JP2019-12142228 Jun 2019
Published: US 2020/0409329 A131 Dec 2020
Granted: 21 Jun 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G05B 19/058
Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts: safety, monitoring
G05B 19/408
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 19/414
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 2219/14007
Plc safety: plc as standalone for safety control of machine