What is "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.