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SECS-II
The SE-II (SEMI Equipment Communications Standard, Part 2), sometimes called SEMI E5, is a communication protocol used in the semiconductor industry between devices involved in manufacturing. Much like the protocols in the OSI model, SECS-II is a layer above SECS-I and HSMS. While SECS-I and HSMS define how the communications are transmitted (such as over RS-232C or Ethernet), SECS-II defines the format and content of messages that can be sent over SECS-I or HSMS.
The protocol is maintained by the SEMI organization, from which copies of the (SEMI E5 ) standard may be obtained for a fee.
==Usage==
The SECS-II defines the message structure between equipment and host. Most of the SEMI E5 standard is a large library of possible messages – a few of which have redundant functionality with different message structures. Most equipment support only a restricted subset of these messages. Some equipment define custom SECS-II messages that are not part of the SEMI E5 standard.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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