Importance

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Abstract

A device control system includes a controller to control a device including a motor drive shaft. An operation terminal is communicably coupled to the controller. An external instruction synchronized drive command device notifies the controller of a drive command for external instruction synchronized drive of the motor drive shaft. A periodic communication device communicates with the controller at a predetermined period at least during the external instruction synchronized drive. An external instruction synchronized drive execution device executes the external instruction synchronized drive based on the drive command. The external instruction synchronized operation execution stopping device monitors communication from the periodic communication device at least during the external instruction synchronized drive, and stops the external instruction synchronized drive when the communication is interrupted.

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First Claim