HERMOS LFM LP Reader - SECS; HSMS Communications Protocol; Serial Communication (SECS-I); Ethernet Communication (HSMS)

Protocol description ASCII, SECS/HSMS
Customer manual
Version 1.2
LFM LP Reader 15.01.2019
Page 71 of 119
HERMOS AG
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11. SECS / HSMS Communications protocol
The SECS I standard defines a communication interface that is suitable for exchanging messages between
the semiconductor processing systems and a host. A host is a computer or computer network that
exchanges the information with the systems to carry out the production.
The standard does not define the data contained in the message. The meaning of the messages must be
defined by a standard that defines the message content – e.g. by the SEMI Equipment Communications
Standard E5 (SECS-II).
This message record describes the communication between a reading device with SECS-I and a host. The
host and the RFID reading device can communicate via a RS232 interface (SECS-I) or an Ethernet
interface (10/100BaseT) with HSMS protocol. The meaning of the messages is provided in the message
details section in which the message content is defined.
Serial communication (SECS-I):
The data is transmitted or received as a serial bit stream with 10 bits per character in a supported data rate.
A standard character has a start bit, 8 data bits and a stop bit. No parity bits or other controls are used for
transmitting the individual bytes.
Default setting: 19200 / 8N1
Details about the data definition and the data transmission are provide in the SEMI Standard E4.
(SEMI Equipment Communication Standard 1 Message Transfer SECS-I)
Ethernet communication (HSMS):
The reading device functions as a HSMS server. This means that it waits for a connection request from a
HOST PC (client).
TCP/IP: IP-Adresse xxx.xxx.xxx.xxx Port 3241
If there is a connection request from a HOST, a HSMS connection is set up and the SECS II messages
defined in the message record are transmitted from the reading device to the respective HOST and vice
versa. The HSMS connection remains intact until it is specifically terminated by the host or the reading
device.
All reading devices available in the network (LAN) can be operated from any HOST PC. A HSMS reading
device, however, can no longer be connected to more than one HOST simultaneously.
The network settings can be changed using a configuration tool provided by HERMOS. Each change to the
network settings causes the unit to reboot and thus disconnects existing communication connections.
Structure of a message
The communication structure and process is defined by the SEMI Equipment Communications Standards
E4, E5 and E37 (SECS-I, SECS-II, HSMS).
SECS message blocks always have a specified structure that consists of 1-4 length bytes, 10 bytes of
message headers and message data.