US 12,650,673 B2Granted

Control device and control system

AssigneeFanuc Corporation

InventorTakashi Miyoshi

Life of this patent

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Abstract

The control device controls industrial machinery. The control device includes a command analysis unit that analyzes blocks of a control program and creates command data that are based on the command of a given block; a safe operation command storage unit that stores, in advance, command data of a safe operation for transitioning the operating status of industrial machinery into a prescribed safe state; a receiving-interval-monitoring unit that monitors the receiving interval of periodically transmitted information transmitted from the PC; and a receiving-interval-determining unit that compares the receiving interval of the periodically transmitted information with a predetermined prescribed threshold value, and determines whether the receiving interval exceeds the threshold value, either the command data created by the command analysis unit or the command data of the safe operation stored in the safe operation command storage unit being outputted based on of the determination results of the receiving-interval-determining unit.

Claims8

Dependent claims

A control device that controls an industrial machine based on a control program, wherein the control device controls the industrial machine in cooperation with a cooperative application that is an application operating on general-purpose OS of a PC and is related to control of the industrial machine, the control device comprising:

an instruction analysis unit that analyzes a block of the control program to create instruction data based on an instruction of the block;
a safety operation instruction storage unit that stores in advance instruction data on a safety operation for shifting an operation state of the industrial machine to a predetermined safe state;
a reception interval monitoring unit that monitors a reception interval of periodically transmitted information created in a process related to the cooperative application transmitted from the PC;
a reception interval determination unit that compares the reception interval of periodically transmitted information with a predetermined threshold defined in advance and determines whether or not the reception interval exceeds the threshold;
a control instruction selection unit that, based on a determination result from the reception interval determination unit, selects use of instruction data created by the instruction analysis unit for control of the industrial machine when the reception interval is less than or equal to the threshold and selects use of instruction data on a safety operation stored in the safety operation instruction storage unit for control of the industrial machine when the reception interval exceeds the threshold;
and
a control unit that controls the industrial machine based on the instruction data selected by the control instruction selection unit.

4 more elements

A control system formed of a control device and a PC in cooperation, wherein the control device controls an industrial machine based on a control program, and the PC on which a cooperative application that is an application operating on general-purpose OS and is related to control of the industrial machine is running,

wherein the control device comprises
an instruction analysis unit that analyzes a block of the control program to create instruction data based on an instruction of the block,
a safety operation instruction storage unit that stores in advance instruction data on a safety operation for shifting an operation state of the industrial machine to a predetermined safe state,
a reception interval monitoring unit that monitors a reception interval of periodically transmitted information created in a process related to the cooperative application transmitted from the PC,
a reception interval determination unit that compares the reception interval of periodically transmitted information with a predetermined threshold defined in advance and determines whether or not the reception interval exceeds the threshold,
a control instruction selection unit that, based on a determination result from the reception interval determination unit, selects use of instruction data created by the instruction analysis unit for control of the industrial machine when the reception interval is less than or equal to the threshold and selects use of instruction data on a safety operation stored in the safety operation instruction storage unit for control of the industrial machine when the reception interval exceeds the threshold, and
a control unit that controls the industrial machine based on the instruction data selected by the control instruction selection unit, and
wherein the PC comprises
a state monitoring unit that, to perform processing of the cooperative application, transmits request information for reading at least any one of a state related to the control device or a state related to the industrial machine to the control device and, based on a result of the transmission, monitors at least any one of the state related to the control device or the state related to the industrial machine, and
a processing result transmission unit that transmits a result of processing of the cooperative application to the control device.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/567,771Filed 16 Jun 2021
Published: US 2024/0272606 A115 Aug 2024
Granted: 9 Jun 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G05B 19/4061
Characterised by monitoring or safety: avoiding collision or forbidden zones
G05B 19/4155
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 2219/49141
Nc machine tool, till multiple: detect near collision and slow, stop, inhibit movement tool