公开(公告)号：US20240171422A1

公开(公告)日：2024-05-23

申请号：US18551654

申请日：2021-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YOSUKE MAJIMA ,  HAYATA SAKAI

IPC: H04L12/28

CPC classification number: H04L12/28

Abstract: Communication device is a communication device to which a plurality of slaves are daisy-chained and which communicates with the plurality of slaves. Communication device includes processor. Processor executes setting processing. In the setting processing, an update cycle of a specific slave that is a slave having a shortest data update cycle among the plurality of slaves is set to a reference cycle, and an update cycle of another slave different from specific slave among the plurality of slaves is set to an integral multiple of the reference cycle.

公开(公告)号：US20240223351A1

公开(公告)日：2024-07-04

申请号：US18551888

申请日：2022-02-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： ATSUKI KYUHATA ,  HAYATA SAKAI ,  MASASHI MISHIMA

IPC: H04L7/02

CPC classification number: H04L7/02

Abstract: A bandwidth used in a network of a communication system is suppressed. Communication system includes master device and slave device. Master device includes: first counter that increments a first count value every time a first unit time elapses; second counter that updates a second count value every time a second unit time elapses; and master transmitter that transmits timing information indicating a timing at which the second count value is updated to slave device. Slave device includes: third counter that increments a third count value every time the first unit time elapses; fourth counter that increments a fourth count value every time a third unit time shorter than the first unit time lapses, and resets the fourth count value at a timing of incrementing the third count value; and slave receiver that receives the timing information from master transmitter.

公开(公告)号：US20240106735A1

公开(公告)日：2024-03-28

申请号：US18263897

申请日：2021-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： HAYATA SAKAI ,  ATSUKI KYUHATA ,  MASASHI MISHIMA

IPC: H04L45/28 ,  H04L12/437 ,  H04L41/0677

CPC classification number: H04L45/28 ,  H04L12/437 ,  H04L41/0677

Abstract: The time taken from an occurrence of an anomaly related to network connection to a change of a transmission path of a frame is shortened as compared with a conventional art. Communication system includes controller and a plurality of slaves each including third input and output port and fourth input and output port. Slave includes detector and slave transmission control part. Detector detects an anomaly related to connection of third input and output port and an anomaly related to connection of fourth input and output port. When detector detects the anomaly, slave transmission control part attempts to transmit a disconnection node notification frame indicating that a change in a connection state is detected from third input and output port and fourth input and output port. The controller changes the transmission path of the normal frame in a case of receiving the disconnection node notification frame.