Fanuc Corporation

Masaki Tanabe

Shogo Inoue

The controller has a communication unit that receives read/write requests specifying an address of the same virtual area from a plurality of clients, and an actual area to be read/written by the communication unit. The communication unit has a management table that associates an identifier of the client with an address of the actual area that is different for each client, and an address conversion unit that carries out reading and writing to the address of the actual area associated with the identifier of the client with reference to the management table.

Controller for changing a conversion destination of a virtual area

When a data request is sent from a master device in master-slave communication, a slave device determines whether a piece of data requested by the data request among data stored on the slave device side has been updated after previous transmission of the piece of data. If the piece of data has been updated, the slave device sends the updated piece of data as a response to the data request. If the piece of data has not been updated, the slave device suspends a response to the data request. Thus, a communication system is built which can reduce network processing load and the volume of communication data in the case where the master device periodically acquires data from the slave device.

Slave device

An operation management system is constituted by a management server and a plurality of machine tools connected to each other via a network. The management server manages the operation status of each of the machine tools and the work schedule of an operator conducting work with the machine tools, specifies a machine tool to be used by the operator in next work based on notifications from the machine tools and the work schedule of the operator, and instructs each of the machine tools to produce a display for guiding the operator to the specified machine tool.

Operation management system for directly displaying work instruction based on operation management information on machine tool

A numerical controller includes a numerical control unit, a DNC operation management unit, and first and second communication units. The first and second communication units receive the same NC program from a host through corresponding communication paths. The DNC operation management unit acquires the NC program from a reception data buffer included in one of the communication units to transfer the NC program to the numerical control unit, and when a failure occurs in the communication path used by the communication unit, an acquisition destination of the NC program is switched to a reception data buffer of the other communication unit.

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Yamanashi, Japan

Masaki Tanabe