SST Automation GT200-MT-EI User manual

Modbus TCP / EtherNet/IP Gateway
GT200-MT-EI
User Manual
REV 1.4
SST Automation
E-mail: [e-mail]
WWW.SSTCOMM.COM

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
2
Catalog
1 Product Overview...................................................................................................................................................... 4
1.1 Product Overview........................................................................................................................................... 4
1.2 Product Features............................................................................................................................................. 4
1.3 Technical Specifications................................................................................................................................. 4
2 Quick Start Guide...................................................................................................................................................... 6
2.1 Connect to the power...................................................................................................................................... 6
2.2 Ethernet Interface............................................................................................................................................7
2.3 DIP Switch...................................................................................................................................................... 7
2.4 Software Installation.......................................................................................................................................8
3 Hardware Description................................................................................................................................................ 9
3.1 Appearance......................................................................................................................................................9
3.2 Indicators.......................................................................................................................................................10
3.3 Configuration switch.................................................................................................................................... 10
3.4 Interface........................................................................................................................................................ 11
3.4.1 Power Interface.................................................................................................................................. 11
3.4.2 Ethernet Interface...............................................................................................................................11
4 Instructions of Configuration Software................................................................................................................... 12
4.1 Notes before Configuration.......................................................................................................................... 12
4.2 User Interface................................................................................................................................................12
4.3 Equipment View Operation.......................................................................................................................... 14
4.3.1 Equipment View Interface................................................................................................................. 14
4.3.2 Equipment View Operation Mode.....................................................................................................14
4.3.3 Equipment View Operation Types.....................................................................................................15
4.4 The Operation of Configuration Interface....................................................................................................16
4.4.1 EtherNet/IP Configuration View Interface........................................................................................ 16
4.4.2 Modbus TCP Configuration View Interface......................................................................................17
4.4.3 Node Configuration View Interface.................................................................................................. 19
4.4.4 Command Configuration View Interface.......................................................................................... 20
4.4.5 Comment Interface............................................................................................................................ 22
4.5 Conflict Detect.............................................................................................................................................. 22
4.5.1 Command List Operation.................................................................................................................. 23
4.5.2 Memory Mapping Operation.............................................................................................................24
4.6 Hardware Communication............................................................................................................................25
4.6.1 Ethernet Configuration...................................................................................................................... 25
4.6.2 Upload Configuration........................................................................................................................ 26
4.6.3 Download Configuration................................................................................................................... 27
4.7 Load and Save Configuration....................................................................................................................... 29
4.7.1 Save Configuration Project................................................................................................................29
4.7.2 Load Configuration Project............................................................................................................... 29

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
3
4.8 Excel File Output.......................................................................................................................................... 29
4.9 Monitor I/O Data.......................................................................................................................................... 30
5 Working Principle of Modbus TCP Master............................................................................................................. 33
6 Working Principle of Modbus TCP Slave............................................................................................................... 34
6.1 Working Principle......................................................................................................................................... 34
6.2 Network Status Monitor............................................................................................................................... 34
7 EtherNet/IP Connection Parameters Set..................................................................................................................36
8 How to Read/Write I/O Data using MSG................................................................................................................37
8.1 Read I/O Data............................................................................................................................................... 37
8.2 Write I/O Data...............................................................................................................................................41
9 Typical Application.................................................................................................................................................. 48
9.1 EtherNet/IP master PLCs interconnect with Modbus TCP master PLCs.................................................... 48
9.2 Modbus TCP slave devices connect to EtherNet/IP network.......................................................................49
10 Installation..............................................................................................................................................................50
10.1 Machine Dimension....................................................................................................................................50
10.2 Installation Method..................................................................................................................................... 51

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
4
1 Product Overview
1.1 Product Overview
GT200-MT-EI is a gateway which can realize the interconnection of different industrial Ethernet devices.
The gateway supports Modbus TCP master/slave and EtheNet/IP slave. It can finish the data exchange between
Modbus TCP network and EtherNet/IP network. Also, it supports the interconnection between Schneider PLC and
AB PLC and connecting the Modbus TCP slave devices to the EtherNet/IP network.
1.2 Product Features
Modbus TCP master or slave optional;
EtherNet/IP slave;
Redundant power;
Support network status monitor function;
Support I/O data monitor function;
Provide easy-to-use configuration software SST-EE-CFG.
1.3 Technical Specifications
[1] One Ethernet interface, Modbus TCP and EtherNet/IP shares this interface together;
[2] Ethernet 10/100M self-adaptive;
[3] IP address conflict detection;
[4] Support static IP and DHCP function;
[5] Act as a slave at the EtherNet/IP side, support ODVA standard EtherNet/IP communication protocol;
[6] Read&write of I/O data of EtherNet/IP supports two ways:
a) Direct establish I/O connection to read/write I/O data;
b) Use MSG command to read/write I/O data;

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
5
[7] As Modbus TCP master, support visiting at most 36 different IP or Modbus TCP slave of different unit ID,
support function code 01H, 02H,03H, 04H, 05H, 06H, 0FH, 10H;
[8] Act as slave at the Modbus TCP side, support 36 TCP connections, support function code 03H, 04H, 06H,
10H;
[9] Max input bytes: 492 bytes, max output bytes: 492 bytes;
[10] Provide byte swap function: No swap, double-byte swap, four-byte swap;
[11] Working temperature: -4℉~140℉(-20℃~60℃), relative humidity: 5% ~ 95% (non-condensing);
[12] External Dimensions (W*H*D): 1.57 in*4.92 in*4.33 in (40mm*125mm*110mm);
[13] Installation: 35mm rail;
[14] Protection class: IP20;

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
6
2 Quick Start Guide
2.1 Connect to the power
Use DC 24V power supply, dual power interface, redundant function. User can use one power route or two
routes to provide supply.
When using two powers to supply power, another power can keep supplying power to ensure the normal
operation of equipment if one power fails.
Power wiring is as follows:

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
7
2.2 Ethernet Interface
Ethernet interface uses RJ-45 connector, 10/100M self-adaptive.
Pin
Signal Description
S1
TXD+, Tranceive Data+, Output
S2
TXD-, Tranceive Data-, Output
S3
RXD+, Receive Data+, Input
S4
Bi-directional Data+
S5
Bi-directional Data-
S6
RXD-, Receive Data-, Input
S7
Bi-directional Data+
S8
Bi-directional Data-
2.3 DIP Switch
The DIP switch is located at the bottom of the gateway, bit 1 is mode bit and bit 2 is function bit.
Off
On 1 2
Mode (bit 1)
Function (bit 2)
Description
Off
Off
Run mode, allow reading and writing configuration data
Off
On
Run mode, forbid reading and writing configuration data
On
Off
Configuration mode, IP address is 192.168.0.10 (fixed),
this mode can read and write configuration data but cannot
finish communication between EtherNet/IP and Modbus
TCP
On
On
Reserved

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
8
2.4 Software Installation
Double click the SST-EE-CFG software; users can install it easily according to the instruction. Open the
configuration software and start the configuration of GT200-MT-EI. Detailed information please refer to the using
method of SST-EE-CFG software.
Note: The network factory setting of GT200-MT-EI is DHCP. If no DHCP Server on the network, users can
pull the bit 1 to ON and restart GT200-MT-EI to make the settings take effect. Now, the IP address of
GT200-MT-EI is 192.168.0.10 (fixed), subnet mask is 255.255.255.0, gateway address is 192.168.0.1.

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
9
3 Hardware Description
3.1 Appearance
Ethernet indicators
Dual power interface
Indicators（reserved）
Ethernet RJ45 interface
Configuration switch

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
10
3.2 Indicators
Indicators
Status
Descriptions
ENS
（EtherNet/IP network status
indicators ）
Green on
EtherNet/IP connection is established
Blinking(Green)
EtherNet/IP connection is not established
Red on
Indicates conflict with IP address
Blinking(Red)
EtherNet/IP connection is off or DHCP state
SNS
（Modbus TCP network status
indicators）
Green on
At least one Modbus TCP connection has
been established;
Blinking(Green)
Modbus TCP no connection
Blinking(Red)
Modbus TCP connection is off and no longer
exists
Blinking(Red)
（lasts 3 seconds）
Modbus TCP connection is off
ENS (Orange) and SNS (Orange)
（Orange: Red and green light on at
the same time）
Simultaneously on
Start-up state
Blink alternately
Configuration state
3.3 Configuration switch
The DIP switch is located at the bottom of the gateway, bit 1 is mode bit and bit 2 is function bit.
Off
On 1 2
Mode (bit 1)
Function (bit 2)
Description
Off
Off
Run mode, allow reading and writing configuration data
Off
On
Run mode, forbid reading and writing configuration data
On
Off
Configuration mode, IP address is 192.168.0.10 (fixed),
this mode can read and write configuration data but cannot
finish communication between EtherNet/IP and Modbus
TCP
On
On
Reserved
Notes:
Restart GT200-MT-EI (power off and power on) after resetting the configuration to make the
configuration take effect!

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
11
3.4 Interface
3.4.1 Power Interface
GT200-MT-EI has two power interfaces and power redundant function. When one power fails, another power
can keep supplying power.
Pin
Function
1
GND
2
NC, not connected
3
24V+ , DC 24V
3.4.2 Ethernet Interface
Ethernet interface uses RJ-45 connector; its pin (standard Ethernet signal) is defined as below:
Pin
Signal Description
S1
TXD+, Tranceive Data+, Output
S2
TXD-, Tranceive Data-, Output
S3
RXD+, Receive Data+, Input
S4
Bi-directional Data+
S5
Bi-directional Data-
S6
RXD-, Receive Data-, Input
S7
Bi-directional Data+
S8
Bi-directional Data-

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
12
4 Instructions of Configuration Software
4.1 Notes before Configuration
SST-EE-CFG is the software based on Windows platform. It is used to configure GT200-MT-EI series
gateway and set the relevant parameters of two different industrial Ethernet.
Double click the software icon on the desktop after installation to enter the “Select device” interface:
Select “GT200-MT-EI”, click OK to enter into the main interface of GT200-MT-EI (enter into the default
parameters setting interface of EtherNet/IP. Click the Ethernet type of equipment view interface to switch the
parameters setting interface.
4.2 User Interface
The main interface of SST-EE-CFG includes: Title bar, Menu bar, Tool bar, Status bar, equipment plate,
configuration plate and comment plate.
Note: In this software, all gray parts are the part which cannot be changed.

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
13
Tool Bar:
Toolbar interface shown as follow:
The function from left to right is: New, Open, Save, Add Node, Delete Node, Add Command, Delete
Command, Upload Config, Download Config, Conflict Detect, Auto Mapping, Export Xls and Debug.
New: Create a new configuration project
Open: Open a configuration project
Save: Save current configuration
Add Node: Add a Modbus TCP slave node
Delete Node: Delete a Modbus TCP slave node
Add Command: Add a Modbus command
Delete Command: Delete a Modbus command
Tool Bar
Equipment plate:
Users can choose operation
object, includes Ethernet type
and adding node and command
Menu Bar
Title Bar
Configuration plate:
Input configuration parameters,
gray parts cannot be changed
Comment plate: Explain the
function of the
configuration options

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
14
Upload Config: Read the configuration information from the module and shown in the software
Download Config: Download the configuration file to the gateway
Conflict Detect: To check whether there are some conflicts with configured commands in the gateway
memory data buffer
Auto Mapping: Used to automatically calculate the mapped memory address without confliction by each
command
Export Xls: Export current configuration to the local hard disk, saved as .xls file
Debug: Monitor the gateway memory buffer data
4.3 Equipment View Operation
4.3.1 Equipment View Interface
4.3.2 Equipment View Operation Mode
For equipment interface, support three operation modes: edit menu, edit toolbar and right click edit menu.

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
15
4.3.3 Equipment View Operation Types
1）Add node: Left click on Modbus TCP or existing nodes, and then perform the operation of adding a new
node. Then there is a new node named "New node" under Modbus TCP.
2）Delete node: Left click on the node to be deleted, and then perform the operation of deleting the node. The
node and all commands will be deleted.
3）Add commands: Left click on the node, and then perform the operation of adding command to add a
command for the node. It will pop up the command selecting dialog box for users to choose. Shown as below:
Select the command: Double click command item

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
16
4）Delete commands: Left click on the command to be deleted, perform the operation of deleting the
command.
5）Edit node: Left click the node needs to be reset, and then set parameters of this node in configuration
interface.
6）Copy node: Left click the existing node, choose the node and execute the operation of copying nodes
(include all commands under the node)
7）Paste node: Left click and choose any existing node, execute operation of paste node. Then at the Ethernet
rear part you can see a new node (include all commands under the node); Node parameters of new node is default
setting, it needs to be reset.
4.4 The Operation of Configuration Interface
4.4.1 EtherNet/IP Configuration View Interface
In the equipment view interface, click Ethernet/IP; configuration view interface is as below:

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
17
Configurable items include: Input bytes, Output bytes, Data clear of continuous no response of Modbus TCP
slave
Bus type: EtherNet/IP slave
Input bytes (Instance102): Input bytes number of EtheNet IP, range: 5~496, the default is 496
Output bytes number (Instance101): Output bytes number of EtherNet/IP, range: 1~492, the default is 492
Data clear of continuous no response of Modbus TCP slave: Valid in “Modbus TCP master” function, open,
close optional. Valid in “Modbus TCP master” function. Choose “open”, means to clear the input data of this slave
when continuous three times no response of one Modbus TCP slave.
4.4.2 Modbus TCP Configuration View Interface
In equipment view interface, click “Modbus TCP”, when choosing different protocol, the configuration view
interface and configurable items will be different.
Protocol type select: Modbus TCP master
The configurable items include: Assign IP Mode, IP Address, Subnet Mask, Gateway Address, Response
Timeout, Delay between polls and Polling mode of output commands. As is shown below:

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
18
Assign IP mode: Manual Assign, BOOTP and DHCP optional.
Response timeout: When Modbus TCP master sends out commands, it waits for the response from slave.
Range: 300~60000ms, the default is 1000.
Delay between polls: Receive the right response after one Modbus command has been sent or sending next
Modbus command after response timeout, the range is 0~ 2500ms, the default is 0.
Polling mode of output commands: continuous output, disable output and change-of-state output is optional.
Protocol type select: Modbus TCP slave
The configurable items include: Assign IP Mode, IP Address, Subnet Mask, Gateway Address, Check unit ID,
Unit ID, Network status indicator, High/Low byte swap. Shown as below:

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
19
Assign IP Mode: Manual Assign, BOOTP and DHCP optional.
Check unit ID: open, close optional.
Unit ID (1~247): valid when “Check unit ID” is opened, 1~247 optional.
Network status indicator: both ends monitor with each other, EtherNet/IP monitor the network state of
Modbus TCP, Modbus TCP monitor EtherNet/IP network state and no indicating optional.
High/Low byte swap: No swap, double-byte swap, four-byte swap optional, the default is no swap.
4.4.3 Node Configuration View Interface
In equipment interface, click Modbus TCP, when selecting Modbus TCP at protocol type, right click
“Modbus TCP” and add new node. The node configuration view interface is shown as below:

User Manual
Modbus TCP/EtherNet IP Gateway
GT200-MT-EI
WWW.SSTCOMM.COM
20
Configurable parameters: Unit ID, IP address to access Modbus TCP slaves, device status, memory-mapped
address and memory-mapped bit offset.
Unit ID: Slave address of Modbus TCP, 1~247 optional.
IP address of Modbus TCP slave needs visiting: Input IP address of Modbus TCP slave which gateway wants
to visit.
Device status: Open, close optional. When opened, “memory mapping address” and “memory mapping bit
offset” is optional. Users can see the communication state between this node and gateway in EtherNet/IP input
data.
Memory mapping address: Address range that equipment state is mapped in the module memory,
0x0000~0x01EB. Calculate by clicking “Auto mapping”.
Memory mapping bit offset: Bit x where equipment state is in memory mapping byte, 0~7.
4.4.4 Command Configuration View Interface
In equipment view interface, click node command under Ethernet, the configuration view interface is shown
below:
Configurable parameters: Modbus register starting address, data number, Memory mapping starting address,