SST Automation GS11-EI User manual

Embedded EtherNet/IP Module
GS11-EI
User Manual
REV 1.3
SST Automation
E-mail: [e-mail]
WWW.SSTCOMM.COM

User Manual
Embedded EtherNet/IP Module
GS11-EI
1
Catalog
1. About the Module.................................................................................................................................................3
1.1 General............................................................................................................................................................3
1.2 Features...........................................................................................................................................................3
1.3 Specifications..................................................................................................................................................3
2. Hardware...............................................................................................................................................................5
2.1 Appearance..................................................................................................................................................... 5
2.2 Indicators........................................................................................................................................................ 5
2.3 Interface.......................................................................................................................................................... 5
2.3.1 Ethernet Interface................................................................................................................................ 5
2.3.2 Host Interface...................................................................................................................................... 6
2.4 UART Baud Rate............................................................................................................................................7
2.5 Reset Signal.................................................................................................................................................... 8
3. Communication Protocol......................................................................................................................................9
3.1 Description......................................................................................................................................................9
3.2 The GS11-EI Communication Flowchart and User Program........................................................................ 9
3.3 Real-time monitoring IP function.................................................................................................................10
3.4 Initialize Communication............................................................................................................................. 11
3.5 User-defind Protocol.....................................................................................................................................12
4. Dimension...........................................................................................................................................................14
5. Development Board............................................................................................................................................16
5.1 Appearance................................................................................................................................................... 16
5.2 Function........................................................................................................................................................ 16
5.2.1 RS232 Interface................................................................................................................................. 16
5.2.2 Baudrate Setting Switch.................................................................................................................... 17
5.2.3 Reset Key...........................................................................................................................................18
5.2.4 LED....................................................................................................................................................18
6. Configuration Software...................................................................................................................................... 19
6.1 SST-EIP-CFG Introduction.......................................................................................................................... 19
6.2 Search Equipment.........................................................................................................................................20
6.3 IP Search.......................................................................................................................................................20
6.4 Advanced Configuration.............................................................................................................................. 21
6.5 User Parameter Configuration......................................................................................................................26
7. Configuration Software(EemTest)..................................................................................................................... 30
7.1 Overview.......................................................................................................................................................30
7.2 User Interface................................................................................................................................................30
7.3 Establish/Disconnect Connection.................................................................................................................31
7.4 Receive/Transmit Data................................................................................................................................. 34
8. Precautions of Operation and Maintenance....................................................................................................... 36
Appendix: How to Read and Write I/O Data............................................................................................................. 37
1. Use I/O Method to Read and Write Data................................................................................................... 37
2. Use MSG Method to Read and Write Data................................................................................................42

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Embedded EtherNet/IP Module
GS11-EI
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Read I/O Data............................................................................................................................................. 42
Write I/O Data............................................................................................................................................ 46

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Embedded EtherNet/IP Module
GS11-EI
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1. About the Module
1.1 General
GS11-EI is an embedded EtherNet/IP module and provides instant EtherNet/IP connectivity via the host
interface which is SST defined. Any device that supports the host interface can communicate with GS11-EI
through UART.
1.2 Features
Upgrade your UART or serial device to EtherNet/IP device expediently
Ethernet is 10/100M adaptive
Supports EtherNet/IP Class 1 and Class 3 connections
Provide dedicated configuration software, User-friendly configuration.
Setting the IP address via the UART( Optional Features)
1.3 Specifications
[1]. Support the EtherNet/IP communication protocol that follow ODVA standard.
[2]. GS11-EI provides one Ethernet port and one UART interface (included in the 20-pin connector), can realize
the EtherNet / IP data and serial data conversion;
[3]. Ethernet is 10/100M adaptive
[4]. The size of input and output buffers can be set by users:
The size of input buffer is 256 bytes at most
The size of output buffer is 256 bytes at most
[5]. As an EtherNet / IP server on the Ethernet side, can support 1 EtherNet / IP client to communicate at the
same time, the minimum data update rate is 5ms;
[6]. The serial interface is UART, half duplex, 8 data bits, one stop bit, and no parity, and support 2400,
4800,9600, 19200, 38400, 57600, 115200, 230400 baud rate

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[7]. Serial port use user-defind protocol, easy to realize serial port communication.
[8]. Power: +3.3VDC (3.14 ~ 3.45V), 190mA
[9]. Environmental temperature: -40 ~ 85℃, humidity: 5% ~ 90%
[10].Dimension (W*H*D): 0.88 in*0.95 in*1.46 in (22.6mm*24.2mm*37.2mm).

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2. Hardware
2.1 Appearance
2.2 Indicators
Indicator
Status
Description
Green
Off
No network connection
Always on
Have network connection
Yellow
Off
No network data transmitting or receiving
Blinking
Have network data transmitting or receiving
2.3 Interface
2.3.1 Ethernet Interface
The Ethernet interface uses an 8-line RJ-45 interface, and the pin definitions are as follows:
Network activity
indicator
Network connecting
indicator
PIN8
PIN1

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Pins
Signals
Descriptions
Pin 1
TXD+
Transmit Data+
Pin 2
TXD-
Transmit Data-
Pin 3
RXD+
Receive Data+
Pin 4
BID+
Bi-directional Data+
Pin 5
BID-
Bi-directional Data-
Pin 6
RXD-
Receive Data-
Pin 7
BID+
Bi-directional Data+
Pin 8
BID-
Bi-directional Data-
2.3.2 Host Interface
GS11-EI has a 20-pin socket connector (needle-type), including power, UART and GPIO. The pin position
and definition are as follows:
Pins
Signals
Description
1 ~ 6
NC
Reserved
7
RXD
UART Receive (Input), connect with TXD of host processor or MCU
8
TXD
UART Transmit (Output), connect with RXD of host processor or MCU
9
GPIO
Reserved
10
/RUN
The status of GS11-EI (Output), and need a 10K pull-up resistor on user board.
Logic 1: The GS11-EI module is in starting.
Logic 0: The module’s start has been completed. (Include waiting for initialization
state, start the EtherNet/IP protocol stack and data exchange state, etc.)

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If this pin is pull down to low voltage before starting the module (by using a 1K
pull-down resistor), the module will start with default IP address (192.168.0.11), and
this mode is only used to update the firmware.
11
BAUD2
Set the UART baud rate (Input), see the following table.
12
BAUD1
13
BAUD0
14
/RESET
Reset signal (Input), Active low.
15
+3.3V
+3.3V DC power Supply
16
GND
GND power Supply
17 ~ 19
NC
Reserved
20
/DATAEXCH
Data Exchange (Output), and need a 10K pull-up resistor on the user board.
Logic 1: The module is in non-data exchange state (such as start state, waiting for
initialization state, start the EtherNet/IP protocol stack, etc.)
Logic 0: The module is ready for data exchange.
2.4 UART Baud Rate
UART baud rate settings are as follows:
Index
BAUD2
BAUD1
BAUD0
Baud Rate（bps）
0
0
0
0
2400
1
0
0
1
4800
2
0
1
0
9600
3
0
1
1
19200
4
1
0
0
38400
5
1
0
1
57600
6
1
1
0
115200
7
1
1
1
230400

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2.5 Reset Signal
GS11-EI RESET (Pin 14) is hardware reset signal input. When the RESET pin is pulled down to GND or low
to 2.88V lasting for 1 millisecond, the module will be forced to reset, and the host must wait for 250 milliseconds
(typical value, after reset the module), and then the host must check the PIN10 (/RUN) and PIN20
（/ DATAEXCH）. If the two pins are Logic 0, then the host can exchange data.

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GS11-EI
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3. Communication Protocol
3.1 Description
GS11-EI acts as an EtherNet/IP server at the Ethernet side, serial port use user-defind protocol. The EtherNet
/ IP communication and serial communication are completely independent, through the internal input and output
data buffer of GS11-EI to realize data exchange, according to the GS11-EI serial communication protocol, the user
board can complete the input and output data exchange.
The procedure of message transmission is as follows:
GS11-EI
user -defined
EtherNet/IP
Request1
Request2
Request…
Request a
Request b
Request…
Response1
Response2
Response…
Response a
Response b
Response…
3.2 The GS11-EI Communication Flowchart and User Program
Here are the flowcharts of two kinds of IP configuration; users can choose one of them in accordance with
specific conditions. For the chooses of this two kinds, see also the Advanced Parameters section in chapter 6.4.

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3.3 Real-time monitoring IP function
If the GS11-EI is set to DHCP, then the module will monitor its IP when it is running. If IP changed, it will
pull up /DataExch pin to logic 1.Then two cases:
1. Using configuration software setting IP address mode: The module will obtain an IP again. User needs to
read / DataExch pin state. If it re-becomes logic 0, indicating that the module has obtained IP, and the module

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can begin to communicate;
2. Using UART setting IP address mode: GS11-EI will wait the user to send the setting IP address message, and
the next step is the same with the first initialization.
3.4 Initialize Communication
Communication mode: user board (host) is the communication initiator, and GS11-EI responses.
Configuration of baud rate: GS11-EI reads these pins BAUD0, BAUD1 and BAUD2 that select the UART
baud rate when it power on or reset.
1. Initialize request message--- (user board->module), When you choose to use the serial port (UART) to set the
IP address and other information, you can sent this initialization request message.
Byte
EtherNet/IP to user-defind protocol
0
message length is 17 which includes all following bytes except the check sum byte and the length
byte , high-byte first
1
2
The default value is 0; when user set GS11-EI via UART that use DHCP to assign IP address, the value
of this byte is 1 *
3
IP Configuration Mode, 0: Static Configuration; 1: DHCP ;
4
IP Address, high-byte first
5
6
7
8
Subnet Mask, high-byte first
9
10
11
12
Default Gateway Address, high-byte first
13
14
15
16
Reserved, always 0
17
Reserved, always 0
18
Reserved, always 0
19
Check sum, byte 0+byte 1+…+byte 18
Remarks:
when user set GS11-EI module via UART that use DHCP to assign IP address, user board sends above
message（the value of byte 2 should be 1）

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And then, when GS11-EI does not receive the IP address that assigned by DHCP Server on the network, it
will send 0x2E to user board every 1second.
If and only if DHCP Server finished IP allocate, then GS11-EI will send a message that contained IP address,
subnet mask, and default gateway to user board.
For example: GS11-EI sends message to user board: 0C C0 A8 00 BB FF FF FF 00 C0 A8 00 01 95.
The 0x0C is the header and means there are 12 bytes behind, and followed by is a 4 bytes of IP address
(192.168.0.187), 4 bytes of subnet mask (255.255.255.0), 4 bytes The default gateway (192.168.0.1), the last byte
represents checksum.
when user set the GS11-EI module IP address via UART and does not use DHCP, user board sends above
message（the value of byte 2 should be 0）, and then the module will send the following message to the user board.
2. Initialize response message--- (module->user board)
byte
Correct Response
Incorrect Response
0
Data length is 2
Data length is 2
1
0：Correct
Error code (not 0)
2
0
Extra error code
3
Check sum, byte 0+byte 1+byte 2
Check sum, byte 0+byte 1+byte 2
3. Error code
Index
Error Code
Explanation
0
1
Check sum error.
1
2
Data length error.
2
3
IP configuration mode does not exist.
4. Extra error code is always 0xFF
3.5 User-defind Protocol
Communication mode: User board is the communication initiator, and GS11-EI responses.
The request messages contain input data, and the response messages contain output data. The communication
process is as follows:

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1. Request message (user board -> module)
Byte
Description
0
message length includes all following bytes except the check sum byte , high-byte first
1
2
Input data, high-byte first
…
n
n+1
Check sum, byte 0+byte 1+…+byte n
2. Response message of user-defind protocol (module -> user board)
Byte
Correct response
Byte
Incorrect response
0
message length includes all following bytes except the
check sum byte , high-byte first
0
0x80
1
1
Data length is2
2
Output data, high-byte first
2
Error code
…
3
Extra error code
n
4
Check sum, byte 0+byte 1+byte
2+byte3
n+1
Check sum, byte 0+byte 1+…+byte n
3. Error code
Index
Error code
Description
0
1
和校验错误
1
2
数据长度错误
4. Extra error code is always 0xFF.

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4. Dimension
Unit: [mm]
Front:

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Side:
PCB dimension:

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5. Development Board
5.1 Appearance
5.2 Function
5.2.1 RS232 Interface
RS232 interface is DB9 pin-connector, the description show as follow:
Pin
Signal
Description
2
RX
Connect with pin TX of RS232 of PC
3
TX
Connect with pin RX of RS232 of PC
5
GND
Connect with pin GND of RS232 of PC
DB9 hole-connector crossover cable must be used when connect the board with RS232 interface of PC, as shown
below:

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RX
Development
board
TX
RS232 interface
GND
RX
PC 机
TX
RS232 interface
GND
2
3
5
2
3
5
5.2.2 Baudrate Setting Switch
The 4-bit DIP switch on the development board is used to set the serial (UART) baud rate and default IP
address locking（For firmware update）:
1 2 3 4
ON
1
0
Low bit Middle bit High bit Default IP address
locking
Corresponding relationship of baud rate is as follows:
Index
High bit
Middle bit
Low bit
Corresponding baud rate（bps）
0
0
0
0
2400
1
0
0
1
4800
2
0
1
0
9600
3
0
1
1
19200
4
1
0
0
38400
5
1
0
1
57600
6
1
1
0
115200
7
1
1
1
230400
The baud rate showing in the picture is 115200bps.

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The fourth bit of DIP is “Default IP address locking” bit. When this bit is “ON”, Module is in firmware
update state (unable to communicate normally), and the module will start up with default IP configuration.
IP address：192.168.0.11
Subnet mask：255.255.255.0
Default gateway：192.168.0.1
5.2.3 Reset Key
The key on the development board is the reset key, which is used to manual reset GS11-EI.
5.2.4 LED
There are six indicators on the development board, and the description is as follows:
Index
Name
Description
0
Power
Power indicator, On: Power on; Off: Power off
1
RTS
Reserve
2
TX
GS11-EI’UART transmits indicator;
Blinking: GS11-EI’UART is transmitting data;
Off: GS11-EI’UART isn't transmitting data.
3
RX
GS11-EI’UART receives indicator.
Blinking: GS11-EI’UART is receiving data;
Off: GS11-EI’UART isn't receiving data.
4
Run
GS11-EI status indicator,
On: In run status;
Off: In start-up status.
5
DataExch
GS11-EI data-interchange indicator,
On: In data-exchange status;
Off: Not in data-exchange status.

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6. Configuration Software
Put the product CD into the computer CD drive, open the CD, and install the configuration software
SST-EIP-CFG. Follow the prompts to complete the installation. Then open the configuration software and finish
the configuration of GS11-EI.
System Requirements:
· PC with 1 GHz processor or higher
· Windows® XP/Windows® 7
· Free disk space: min. 130 M Byte
· CD ROM drive
· RAM: min. 256 M Byte, recommended 512 M Byte
· Keyboard and Mouse
6.1 SST-EIP-CFG Introduction
SST-EIP-CFG is a product based on Windows platform, and is used to configure parameters of GS11-EI,
Double click the icon to run the SST-EIP-CFG and its main window will appear.：