发明名称 |
MESSAGING APPLICATION LAYER (MODBUS) OVER ETHERNET TO TRANSPORT LAYER (TCP) COMMUNICATIONS METHOD AND APPARATUS |
摘要 |
<p>A communications adapter (10) is provided for interfacing between a master device (12) and an I/O device (14) (body) having an output and/or an input. In the case of the I/O body (14) having an output, the adapter has a TCP port for coupling to the master device via a trasmission path for receiving a request message. The adapter (10) also has a connector for operable coupling to the I/O device (14) for receiving the output of the I/O device. The adapter (10) further has an interface circuit operably connected to the TCP port and the connector for transmitting a response message over the transmission path in response to the request message, the response message correlating to the output received from the I/O device. The request message and the response message is limited to a length that is less than a TCP transaction length and/or a maximum transmission unit limit, or both, depending on the embodiment of the present invention.</p> |
申请公布号 |
WO0025183(A1) |
申请公布日期 |
2000.05.04 |
申请号 |
WO1999US21806 |
申请日期 |
1999.09.17 |
申请人 |
SCHNEIDER AUTOMATION INC. |
发明人 |
SWALES, ANDREW, G.;PAPADOPOULOS, A., DEAN;TANZMAN, ALLAN |
分类号 |
G05B19/05;G05B19/418;H04L12/28;H04L12/413;H04L29/06;H04L29/10;(IPC1-7):G05B19/05 |
主分类号 |
G05B19/05 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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