Yokogawa Electric Corporation

Kensuke Hosoya

Masahito Endo

Hirokazu Sasaki

Yukiyo Akisada

Hiroshi Miyata

Hiroki Endo

Minoru Midorikawa

Shin-ichi Fujisawa

A management device according to an aspect of the present invention transmits and receives information to and from a relay device that is able to communicate with a field device installed in a plant. The management device includes a storage unit including a first setting storage area configured to store first setting information that is setting information of the relay device and a second setting storage area configured to store second setting information that is setting information of the field device and a first setting management unit that writes the first setting information and the second setting information to the relay device.

Management device, relay device, field wireless system, setting method, and recording medium

An antenna module which transmits and receives a radio signal via a wireless network, the antenna module includes an antenna configured to transmit and receive the radio signal, a circuit configured to convert a signal received from outside into a radio signal, make the antenna transmit the converted radio signal, and transmit a signal generated by processing the radio signal received by the antenna to the outside, a tubular casing configured to accommodate the circuit to cover a periphery of the circuit, an antenna accommodator provided at one end of the casing and configured to accommodate the antenna to allow the antenna to transmit and receive the radio signal, a connector joined to the casing and connectable to an external device which transmits and receives a signal to and from the circuit, a router configured to relay the signal processed by the circuit, and a gateway configured to communicatively connect the router and the external device connected to the connector.

Antenna module

In a field control system in which a plurality of field equipments that are operated in a previously set schedule and constitute a control loop perform a packet communication via a network, there is provided a configurator for collecting measured result packets to which a time stamp of each field equipment is affixed respectively, grasping at least any one of communication times between respective field equipments based on the time stamp, and adjusting operation schedules of respective field equipments in response to the communication times.

Field control system and field control method

There is provided an IP network system. The IP network system includes: a plurality of relays making up a ring network; a source host for transmitting a packet and connected to the ring network; and a destination host which conducts a packet communication with the source host through the ring network. Each of the relays is operable to transfer received packets containing a transfer direction information to the destination host through a right-handed route of the ring network and through a left-handed route of the ring network, based on the transfer direction information.

IP network system

The invention is to solve the problem in that mutual communication between an IPv6-capble device and an IPv4-capble device has not been carried out in a system wherein the IPv6-capble device and the IPv4-capble device are mixed. An entry of a live list is retrieved when SM Device Annunciation is received from the IPv6-capble device, and a transmission IPv4 address is acquired from an IPv4 address pool if the entry is not found, thereby preparing translation rules so as to be stored in a translation rules storage section, while preparing an entry to be registered in the live list, whereby an IP address in a message is translated with reference to the translation rules. Further, a timestamp of the entry is updated every time when the SM Device Annunciation is received. Even if the address is contained in the message, the mutual communication between the IPv6-capble device and the IPv4-capble device can be carried out, and devices connected to the system can be controlled.

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Musashino, Japan

Kensuke Hosoya