Expansion module for programmable logic controller using USB communication
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United States of America Patent
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Mar 6, 2018
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N/A
app pub date -
May 1, 2015
filing date -
May 13, 2014
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Abstract
An expansion module for a PLC, used in such a manner that at least one expansion module is sequentially connected to a basic unit in order to exchange massive data at high speed by using USB communication, is provided. Each of the expansion module includes a USB hub and a USB device, and is allocated with an exchange number from a USB host of the basic unit by activating the USB device according to input of a trigger signal. In addition, whether the USB hub is to be used is determined by deciding whether the expansion through the USB hub is required according to the allocated exchange number. Thus, a user needs only to arrange each of the expansion modules by a designation.
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