GATEWAY DEVICE AND PACKET CAPTURING METHOD

• US 20150365251A1
• Filed: 06/15/2015
• Published: 12/17/2015
• Est. Priority Date: 06/16/2014
• Status: Abandoned Application

• Current Assignee: Azbil Corporation (Azbil BioVigilant Incorporated)
• Original Assignee: Azbil Corporation (Azbil BioVigilant Incorporated)
• Inventors: KINOSHITA, Makoto, TASHIRO, Hideki
• Application Number:
  US14/739,501
• Publication Number:
  US 20150365251A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 12/40 Bus networks
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 2012/4026 Bus for use in automation systems

Abstract

A gateway device for relaying between a system bus, to which a system instrument is connected, and a field bus, to which a field instrument is connected, is used in a controlling system for controlling and monitoring facilities equipment. The gateway device includes: a packet capturing portion that captures packets that are exchanged with the field instrument over the field bus, in response to a start command from a higher-level device that is connected to the system bus; and a packet transmitting portion that transmits the captured packets, after encapsulation, to the higher-level device over the system bus.

Claims

1. :

A gateway device for relaying between a system bus, to which a system instrument is connected, and a field bus, to which a field instrument is connected, used in a controlling system for controlling and monitoring facilities equipment, the gateway device comprising;

a packet capturing portion that captures packets that are exchanged with the field instrument over the field bus, in response to a start command from a higher-level device that is connected to the system bus; and

a packet transmitting portion that transmits the captured packets, after encapsulation, to the higher-level device over the system bus.

2. :

The gateway device as set forth in claim 1, wherein;

the packet capturing portion terminates capturing either after a specific amount of time has elapsed since the start command or in response to an end command from the higher-level device prior to the specific amount of time elapsing.

3. :

The packet capturing method used in a gateway device for relaying between a system bus, to which a system instrument is connected, and a field bus, to which a field instrument is connected, used in a controlling system for controlling and monitoring facilities equipment, the method comprising;

a packet capturing step for capturing packets that are exchanged with the field instrument over the field bus, in response to a start command from a higher-level device that is connected to the system bus; and

a packet transmitting step for transmitting the captured packets, after encapsulation, to the higher-level device over the system bus.