GATEWAY DEVICE AND PACKET CAPTURING METHOD
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United States of America Patent
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Issued Date -
Dec 17, 2015
app pub date -
Jun 15, 2015
filing date -
Jun 16, 2014
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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.
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