User's Manual

Product Manual - RFID Reader LF60C SoliD 64
Chapter 7
Operation
7.4 Operation of SECS/HSMS Protocol
7.4.1 Introduction
The SECS-I standard defines a communication interface that is suitable for
exchanging messages between semiconductor processing equipment and a host.
A host is a computer or network of computers that exchanges information with
the equipment to perform/execute the production.
The standard does not define the data contained within a message. The meaning
of messages must be determined through a message contents standard such as
SEMI Equipment Communications Standard E5 (SECS-II).
This standard provides the means for independent manufacturers to produce
equipment and hosts that can be connected without requiring specific knowledge
of each other.
The SECS-I protocol can be seen as a layered protocol used for point-to-point
communication. The layers within SECS-I are the physical link, the block transfer
protocol and the message protocol.
The standard is not intended to meet the communication needs of all possible
applications. For example, the speed of RS232 may be insufficient to meet the
needs of transferring mass amounts of data or programs in a short period, such
as may be required for high-speed functional test applications.
In a network, the roles of host and equipment may be assumed by any party of
the network. In this situation, one end of the communications link must assume
the role of the equipment and the other the role of the host.
Electronic Industries Association Standards:
EIA RS-232-C Interface between Data Terminal Equipment and Data
Communication Equipment Employing Serial Binary Data Interchange.