发明名称 |
Messaging application layer over ethernet to transport layer (TCP) communications method and apparatus for a modular terminal input/output system |
摘要 |
A communications adapter and method are provided for interfacing between a master device and an I/O device (body) having an output and/or an input. In the case of the I/O body having an output, the adapter has a TCP port for coupling to the master device via a transmission path for receiving a request message. The adapter also has a connector for operable coupling to the I/O device for receiving the output of the I/O device. The adapter 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.
|
申请公布号 |
US6466995(B2) |
申请公布日期 |
2002.10.15 |
申请号 |
US20010804362 |
申请日期 |
2001.03.12 |
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):G06F3/00;G06F13/00 |
主分类号 |
G05B19/05 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|