Mitsubishi Denki Kabushiki Kaisha

Yuusuke Ushio

Kenji Suzuki

Satoru Nakai

Shinichiro Chino

Chihiro Morita

Tsutomu Kazama

Kimio Saito

A controller controls a time stamp providing unit to provide a periodic transfer packet with a time stamp showing the synchronous timing of periodic control designated by the control period timer using the global time indicated by a global timer. Devices are corrected to synchronize operation period timers with the periodic control, by using the time difference between the synchronous timing time of periodic control indicated by the time stamp of the transmitted periodic transfer packet and the global time indicated by global timers, at periodic operation timing of the operation period timers.

Periodic control synchronous system

Transmission delay in a serial bus connected network is determined by transmitting a Ping packet which is replied to in a physical layer of the bus from a request node to a response node, and measuring the time required from transmission of Ping packet by the request node until a SelfID packet corresponding to the Ping packet is returned to the request node. The delay deviation between cycle timers of the request node and the response node is compensated by this transmission delay. The delay deviation may be also compensated using a time stamp.

Synchronizing system using IEEE 1394 serial bus standard

There is provided a serial transmitting section for serially transmitting a command frame which is sent from a host controller to a positioning type servo amplifier and a command follow-up type servo amplifier . In the command frame , an information section, into which information to be transmitted is inputted, has discrimination data for showing a selection between the positioning type servo amplifier and the command follow-up type servo amplifier . In the positioning type servo amplifier and the command follow-up type servo amplifier , there is provided information reading section for reading the content of an information section after the discrimination data of the command frame by the discrimination data of the command frame

Growing community of inventors

Tokyo, Japan

Yuusuke Ushio