Patents by Inventor Shigenori Sawada

Shigenori Sawada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11092945
    Abstract: Provided is a control device comprising a communication management part, a computation part, and a result output part. The communication management part is for managing data communication using cyclic communication conforming to a prescribed communication cycle with respect to a field network. The computation part is for measuring a propagation delay time from received data corresponding to actual measurement data for a propagation delay having been transmitted to the field network, and detecting an operation state of the field network using the propagation delay time measurement result. The result output part is for outputting the result of the detection performed by the computation part.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: August 17, 2021
    Assignee: OMRON Corporation
    Inventors: Yasushi Yamawaki, Shigenori Sawada, Kojiro Baba
  • Patent number: 11095382
    Abstract: A communication system according to one aspect of the present disclosure is a communication system in which a plurality of communication devices are connected to a network. The plurality of communication devices include a time master including a master clock that manages time of the communication system and a plurality of time slaves each of which includes a slave clock time-synchronized with the master clock. Each of the plurality of time slaves includes a synchronization unit that performs time synchronization with another communication device connected adjacent to a master side on the network and a communication unit that notifies the time master of time synchronization information indicating time synchronization accuracy of the own device obtained by the synchronization unit.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: August 17, 2021
    Assignee: OMRON Corporation
    Inventors: Mitsuhiro Yoneda, Shigenori Sawada
  • Publication number: 20210157293
    Abstract: The junction device includes a first error detection means that detects a transmission error by monitoring the periodic reception of a first communication frame, and a state switching means that switches, when a transmission error is detected by the first error detection means, a state of the junction device to either a first state in which the signal output from all of the functional units connected to the junction device is disabled or a second state in which the signal output from some of the functional units connected to the junction device is continuously updated based on the configuration of each functional unit connected to the junction device.
    Type: Application
    Filed: September 26, 2018
    Publication date: May 27, 2021
    Applicant: OMRON Corporation
    Inventor: Shigenori SAWADA
  • Publication number: 20210064003
    Abstract: A controller includes a processor and a communication circuit. The controller controls an object of control by sequentially repeating, on a predetermined control cycle, the transmission of the output data, the reception of the input data, and execution of a control program for generating the output data using the input data. In the transmission of the output data, the processor executes: storing of the output data in a frame, the output data having been generated by the execution of the control program in a previous control cycle; and control of the communication circuit such that the frame, in which the output data is stored, is transmitted to the object of control. The processor executes, in a current control cycle, at least a part of the storing of the output data in a frame that is to be executed in a next control cycle.
    Type: Application
    Filed: February 1, 2019
    Publication date: March 4, 2021
    Applicant: OMRON Corporation
    Inventors: Mitsuhiro YONEDA, Shigenori SAWADA, Yasunori FUKUDA
  • Patent number: 10924406
    Abstract: A control device includes a cyclic communication part and a communication management part. A cyclic communication part controls communication of first control data of which arrival in a first guarantee time is guaranteed according to a preset cyclic period and second control data of which arrival in a second guarantee time longer than the cyclic period is guaranteed and of which a sequence of information included is determined. The communication management part manages a communication schedule of first control data and second control data. When new second control data is acquired while the second control data is divided into a plurality of communication data and communicated according to the cyclic period, the communication management part determines a communication sequence of the plurality of second control data according to priorities of the plurality of second control data.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: February 16, 2021
    Assignee: OMRON Corporation
    Inventors: Mitsuhiro Yoneda, Shigenori Sawada, Hirohito Mizumoto, Ziqiang Xu
  • Publication number: 20210044449
    Abstract: A control system includes a master device and one or a plurality of slave devices connected to the master device via a field network. In a storage unit of each slave device, a node address is arranged in a unique region for each model of the slave devices. The control system further includes an information providing part which provides, in any slave device, information for specifying the region in which the node address is stored in the storage unit to the master device.
    Type: Application
    Filed: March 20, 2019
    Publication date: February 11, 2021
    Applicant: OMRON Corporation
    Inventors: Shigenori SAWADA, Akihiro TAMURA, Yuji IKEO
  • Publication number: 20200366513
    Abstract: Reliability with which a control device at a transmission destination can receive data is improved. In a communication system in which a plurality of control devices for factory automation are connected to a network, a communication protocol among the control devices includes a publish/subscribe type. Each of the control devices includes: a data storage unit in which control data is stored; a publisher unit that transmits data including a state of the control device of the publisher unit itself to other control devices than the control device; and a subscriber unit that receives data from each of the other control devices. When a state of each of the other control devices that is received by the subscriber unit satisfies a reception allowing condition, the publisher unit transmits the control data of the control device of the publisher unit itself.
    Type: Application
    Filed: October 4, 2018
    Publication date: November 19, 2020
    Applicant: OMRON Corporation
    Inventors: Mitsuhiro YONEDA, Shigenori SAWADA, Shinji MURAYAMA, Yasuo MUNETA
  • Publication number: 20200244381
    Abstract: A communication system according to one aspect of the present disclosure is a communication system in which a plurality of communication devices are connected to a network. The plurality of communication devices include a time master including a master clock that manages time of the communication system and a plurality of time slaves each of which includes a slave clock time-synchronized with the master clock. Each of the plurality of time slaves includes a synchronization unit that performs time synchronization with another communication device connected adjacent to a master side on the network and a communication unit that notifies the time master of time synchronization information indicating time synchronization accuracy of the own device obtained by the synchronization unit.
    Type: Application
    Filed: January 29, 2019
    Publication date: July 30, 2020
    Applicant: OMRON Corporation
    Inventors: Mitsuhiro YONEDA, Shigenori SAWADA
  • Publication number: 20200225645
    Abstract: Provided is a control device comprising a communication management part, a computation part, and a result output part. The communication management part is for managing data communication using cyclic communication conforming to a prescribed communication cycle with respect to a field network. The computation part is for measuring a propagation delay time from received data corresponding to actual measurement data for a propagation delay having been transmitted to the field network, and detecting an operation state of the field network using the propagation delay time measurement result. The result output part is for outputting the result of the detection performed by the computation part.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 16, 2020
    Applicant: OMRON Corporation
    Inventors: Yasushi YAMAWAKI, Shigenori SAWADA, Kojiro BABA
  • Publication number: 20200201300
    Abstract: A control system which controls a control target includes a controller connected to one or more devices through a network, and an information processing apparatus connected to the controller. The controller includes an event log containing an event having occurred during a control operation, and network statistical information containing statistical information associated with data transmission on the network. The information processing apparatus includes a factor estimation unit that provides an interactive user interface in accordance with selection of an anomaly phenomenon registered in the event log.
    Type: Application
    Filed: November 21, 2018
    Publication date: June 25, 2020
    Applicant: OMRON Corporation
    Inventors: Kojiro BABA, Yasushi YAMAWAKI, Shigenori SAWADA
  • Publication number: 20200192302
    Abstract: This control system is provided with a plurality of slave devices and controllers. The controller is connected to one end of a field bus which includes the plurality of slave devices that is linearly connected, and the controller is connected to the other end of the field bus through a communication cable. The controllers are provided with a CPU and a transception part. One of the controllers generates a control frame with the CPU and transmits this from the transception part, and the other of the controllers performs a loop communication of the control frame by the transception part.
    Type: Application
    Filed: July 3, 2018
    Publication date: June 18, 2020
    Applicant: OMRON Corporation
    Inventors: Shigenori SAWADA, Yasuo MUNETA
  • Publication number: 20200186420
    Abstract: A rule for transferring data over a communication network is changed for each communication apparatus without spending time and cost. In a communication system in which a plurality of communication apparatuses are connected to a network, at least one of the plurality of communication apparatuses includes rule storage means for storing a plurality of transfer rules for transferring data over the network, transfer means for transferring data incoming over the network in accordance with one of the plurality of transfer rules, and rule switching means for switching one transfer rule to another transfer rule when the communication apparatus receives a notification from the outside.
    Type: Application
    Filed: October 1, 2018
    Publication date: June 11, 2020
    Applicant: OMRON Corporation
    Inventors: Mitsuhiro YONEDA, Shigenori SAWADA
  • Publication number: 20200186385
    Abstract: Provided is a control device comprising a communication management part and a user application processing part. The user application processing part is for detecting slave devices, which are communication targets of control data having been set using a setting tool, and the slave devices are connected to a filed bus. The communication management part is for managing the communication of the control data in accordance with a control cycle. The communication management part determines the control cycle using a pre-stored propagation delay time for each of the slave devices that are the communication targets of the control data.
    Type: Application
    Filed: January 22, 2019
    Publication date: June 11, 2020
    Applicant: OMRON Corporation
    Inventors: Yasushi YAMAWAKI, Taishi KAWAGUCHI, Kojiro BABA, Shigenori SAWADA
  • Publication number: 20200183336
    Abstract: This control system comprises controllers and slave devices. A control network is formed by connecting the slave devices between the controllers over communication cables. The controller generates and manages control frames for communication through the control network. The controller receives and copies the control frames, and perform loopback communication of the control frames to the controller of the control network. The controller stores the copied the control frames, or transmits the copied control frames to a database device connected by an information communication network.
    Type: Application
    Filed: July 3, 2018
    Publication date: June 11, 2020
    Applicant: OMRON Corporation
    Inventors: Shigenori SAWADA, Yasuo MUNETA
  • Publication number: 20200112456
    Abstract: This control system is provided with a controller, a controller which is a loopback communication device, a first communication route, and a second communication route. The controller generates and transmits control frames to slave devices. The controller performs loopback communication of the control frames. In the first communication route, multiple slave devices are connected between the controller and the controller using communication cables. In the second communication route, the first controller and the second controller are connected over a communication cable.
    Type: Application
    Filed: July 3, 2018
    Publication date: April 9, 2020
    Applicant: OMRON Corporation
    Inventor: Shigenori SAWADA
  • Patent number: 10579496
    Abstract: An information processing device includes: a collection unit configured to collect an event log corresponding to an event generated in a control system including at least one network; an extraction and specification unit configured to extract at least one event log corresponding to an event generated arising from an identical factor from the collected event log, and to specify an event log representing the event generated arising from the identical factor in the at least one event log extracted; and an output unit configured to output the event log representing the event generated arising from the identical factor and event logs corresponding to other events generated arising from the identical factor while distinguishing the event log representing the event generated arising from the identical factor and the event logs corresponding to other events generated arising from the identical factor from each other.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: March 3, 2020
    Assignee: OMRON Corporation
    Inventors: Shigenori Sawada, Shinji Murayama, Tianbing Li
  • Patent number: 10554522
    Abstract: A master device, slave device, error monitoring system, and control method and control program of master device are provided. According to the present invention, in the connection less communication, no matter in operation or not, the generation of the communication errors can be monitored. The master device comprises: an indication sending part, sending an indication enabling a plurality of slave devices to send an error log; an error log receiving part, receiving the error logs; and a storing part, storing the error logs by corresponding to each of the slave devices.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 4, 2020
    Assignee: OMRON Corporation
    Inventors: Shigenori Sawada, Taishi Kawaguchi, Yasushi Yamawaki
  • Patent number: 10523761
    Abstract: The invention is adapted to acquire more useful log data. A master device (4) includes a timer element (45), adapted to acquire a moment; an instruction sending element (421), adapted to synchronize a moment measured by a slave timer element (14) of slave devices (1-3) with a moment acquired by the timer element (45) according to a time synchronization instruction containing moment information corresponding to the moment acquired by the timer element (45); and a slave log receiving element (423), adapted to receive slave logs (131).
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: December 31, 2019
    Assignee: OMRON Corporation
    Inventors: Shigenori Sawada, Taishi Kawaguchi, Yasushi Yamawaki, Kojiro Baba
  • Patent number: 10491456
    Abstract: An information processing device includes: a detection unit configured to detect an event generated in a control system including at least one network; a connection configuration expression unit configured to visually express a physical connection and a logical connection of the network included in the control system; and an event output unit configured to output the event detected by the detection unit while correlating the event with the physical connection and the logical connection of the network, the physical connection and the logical connection being visually expressed according to a place where the event is generated.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: November 26, 2019
    Assignee: OMRON Corporation
    Inventors: Shigenori Sawada, Shinji Murayama, Tianbing Li
  • Publication number: 20190296985
    Abstract: A management device capable of facilitating an operation of analyzing an event that has occurred in a node is provided. A management device is a management device that manages a network that includes one or more nodes that record occurrence of a predetermined event and includes: an event log acquisition unit that acquires event logs that associate occurrence times of the event and information that specifies the event from the nodes; and a network configuration diagram display unit that displays a network configuration diagram indicating a connection relationship of the nodes, and the network configuration diagram display unit displays the node in which the event has occurred to be distinguishable from the node in which the event has not occurred in the network configuration diagram.
    Type: Application
    Filed: February 13, 2019
    Publication date: September 26, 2019
    Applicant: OMRON Corporation
    Inventors: Yoshihiro MIHARA, Yuji IKEO, Shigenori SAWADA, Tomonori MANOME