SST Automation GT200-3HT-MT User manual

3-channel HART/Modbus TCP Gateway
GT200-3HT-MT
User Manual
V 1.2 REV A
SST Automation
E-mail: [e-mail]
WWW.SSTCOMM.COM

User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
WWW.SSTCOMM.COM 2
Catalog
1 Product Overview...................................................................................................................................................... 4
1.1 Product Function.............................................................................................................................................4
1.2 Product Features............................................................................................................................................. 4
1.3 Technical Specifications................................................................................................................................. 4
1.4 Safety and Explosion-proof Features............................................................................................................. 5
1.5 Related Products............................................................................................................................................. 5
1.6 Revision History............................................................................................................................................. 5
2 Quick Start Guide...................................................................................................................................................... 6
2.1 Configuration of Gateway.............................................................................................................................. 6
2.1.1 Pre-configured Settings....................................................................................................................... 6
2.1.2 Software Configuration....................................................................................................................... 6
2.2 Function Demo............................................................................................................................................... 9
3 Hardware Descriptions.............................................................................................................................................11
3.1 Product Appearance...................................................................................................................................... 11
3.2 Indicators.......................................................................................................................................................12
3.3 Configuration Switch/Button........................................................................................................................12
3.3.1 Status Setting Switch......................................................................................................................... 12
3.3.2 Internal / External Sampling resistor Switch.....................................................................................13
3.4 Interface........................................................................................................................................................ 13
3.4.1 Power Interface..................................................................................................................................13
3.4.2 Ethernet Interface...............................................................................................................................14
3.4.3 HART Interface..................................................................................................................................14
3.5 Topology of GT200-3HT-MT and Fieldbus Devices................................................................................... 16
4 Software Instructions............................................................................................................................................... 18
4.1 Software Interface Description.....................................................................................................................18
4.2 Software Functional Specifications..............................................................................................................21
4.2.1 Configure the Fieldbus...................................................................................................................... 21
4.2.2Configure the HART Fieldbus............................................................................................................21
4.2.3 Conflict Detection..............................................................................................................................29
4.2.4 AutoMap............................................................................................................................................ 29
4.2.5 Upload Configuration........................................................................................................................ 30
4.2.6 Download Configuration................................................................................................................... 32
4.2.7 Memory Data Display....................................................................................................................... 32
4.2.8 Diagnose............................................................................................................................................ 33
4.2.9 Switching Tools................................................................................................................................. 36
5 Working Principle.................................................................................................................................................... 38
5.1 Flowchart of Executing One HART Command........................................................................................... 42
5.2 Universal Sending and Receiving Data........................................................................................................42
5.3 Trigger Command......................................................................................................................................... 43

User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
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5.4 Data Exchange with Modbus........................................................................................................................44
6 Installation................................................................................................................................................................45
6.1 Machine Dimension......................................................................................................................................45
6.2 Installation Method.......................................................................................................................................46

User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
WWW.SSTCOMM.COM 4
1 Product Overview
1.1 Product Function
GT200-3HT-MT gateway is designed to exchange data between multiple channel HART and Modbus TCP.
HART interface can be configured as a primary master or the secondary master. Modbus TCP side acts as a
slave.
1.2 Product Features
Simple to use: users can refer to product manuals and application case to achieve communication in a short
time according to the requirements of the configuration;
3 independent HART channels with transformers-isolated;
Ethernet 10/100M self-adaptive;
Rich debugging features, the command of the subsection mapping function, the visual display of data
exchange, HART slave command diagnostic functions greatly facilitate the user's communication test;
The HART command and Modbus TCP parameters can be configured by configuration software.
1.3 Technical Specifications
[1] HART interface can be used as a primary master or a secondary master;
[2] Supports 3 independent HART channels, under multi-point mode, each channel support connecting at most
13 instruments with gateway internal resistor and supports connecting 15 instruments with an external
resistor (250Ω/2W);
[3] HART interface supports single-point and multi-point mode;
[4] Under single-point mode, supports data burst operation ;
[5] Supports all commands of the HART protocol;
[6] Each HART command can be configured for change-of-state output, polling output, initialization output or

User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
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no output;
[7] Each channel of HART supports up to 100 HART commands, the output buffer up to 2000 bytes, and the
input buffer up to 3000 bytes;
[8] Each channel can choose to use an internal or external HART sampling resistor;
[9] Support IP address conflict detection and auto routing Modbus TCP slave supports at most 36 connection and
512 command request simultaneously;
[10] Power: 24VDC (9V~30V), <100mA (24VDC)
[11] Working circumstance temperature: -4℉~140℉(-20℃~60℃), Rel Humidity: 5%~ 95% (non-condensing);
[12] External dimensions (W*H*D):1.57 in*4.92 in*4.33 in (40mm*125*110mm);
[13] Installation: 1.38 in (35mm) DIN RAIL
[14] Protection Level: IP20
1.4 Safety and Explosion-proof Features
GT200-3HT-MT is not the product with the features of safety and explosion-proof, please put it in the control
room when using.
1.5 Related Products
The related products include: GT200-3HT-RS and GT200-HT-DP etc.
If you want to get more information about these products, please visit SSTCOMM website:
http://www.sstcomm.com.
1.6 Revision History
Revision
Date
Chapter
Description
REV A
2/11/2017
Chapter 4
V1.2_Rev A new release, enable the
memory data display, diagnosis,
mode selection and other functions,
increase the 4.2.7, 4.2.8 chapters.

User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
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2 Quick Start Guide
The following example introduces the use of the Gateway GT200-3HT-MT.
2.1 Configuration of Gateway
2.1.1 Pre-configured Settings
1. Turn on the “mode” DIP switch and turn off the “function” DIP switch
2. Use network cable to connect the gateway’s Ethernet port (RJ45 interface) with that of computer;
3. Power on the gateway, now the IP address of the gateway is fixed: 192.168.0.10 and it is configurable.
2.1.2 Software Configuration
1. Open the SST-HE-CFG software installed on your computer;
2. Click “Fieldbus” in the tree view on the left, in the “mode” item, select Modbus TCP;
3. Click “Serial setting” in “config” menu, then you will see the “Select the serial port” dialog box in the
pop-up menu;

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3-channel HART/Modbus TCP Gateway
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4. Click “OK”, select the gateway and click “Sign In” in the following “device searching” dialog box;
5. Select the “fieldbus” in the tree view on the left, configure as below in the right interface;
6. Click the “Channel1” in the tree view on the left, the table appearing on the right is configured as below:

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3-channel HART/Modbus TCP Gateway
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Note: In HART protocol, it specifies that the device with slave address 0 works under single point mode, it allows
digital communication and analog communication exist simultaneously. The device with slave address 1~15
works under the multipoint mode, the analog output of the device is the minimum value and it only allows digital
communication. The protocol also specifies that the fieldbus device default address is 0 before delivery.
7. Right click Channel1, select “Add Node” in the popup menu as below:
8. Right click: “Node(0)”, select “Add Command” in the popup menu, add Command ID1 in the popup dialog
box (double click “Command ID1” or select “Command ID1” and click “»”), click OK to return.
9. Click “Command ID1”, the configuration table on the right is configured as below:

User Manual
3-channel HART/Modbus TCP Gateway
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10. Click the icon in the pop-up dialog box, select the Ethernet port which gateway is connected to the
computer, and then click Download:
2.2 Function Demo
HART interface of the gateway GT200-3HT-MT connects with a 2-wire pressure transmitter with slave
address 0. The Ethernet port is connected to the PC through network cable. The configured Modbus POLL
software in PC can simulate to work as a Modbus TCP master, and then you can see the main variable value of the
pressure transmitter in data exchange window:

User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
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User Manual
3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
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3 Hardware Descriptions
3.1 Product Appearance
Note: This picture is for reference only. Product appearance should refer to the real object.
HART Channel1
24VDC Interface
HART Channel3
DIP Switch
Selecting switch of
sampling resistor
HART Channel2
Ethernet interface
Status indicators

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3.2 Indicators
Indicator
State
Status description
TX
Blinking
HART channel data is sending
OFF
No data sending
RX
Blinking
HART channel data is receiving
OFF
No data receiving
NS
Green LED OFF
No Modbus TCP data is exchanging
Green LED Blinking
Modbus TCP data is exchanging
MS
Red LED ON
Indicate confliction of IP address
Red LED Blinking
Connection OFF, configuration status, DHCP, BOOTP, IP
address conflict detection with Modbus TCP
Red LED Blinking
(Remain 3 seconds)
Connection OFF with Modbus TCP
3.3 Configuration Switch/Button
3.3.1 Status Setting Switch
Configuration switch is located at the bottom of product, bit 1 is the mode selecting bit and bit 2 is the
function setting bit.
Debugging (bit 1)
Configuration (bit 2)
Description
Off
Off
In run mode, enable read/write
the configuration data
Off
On
In run mode, disable read/write
the configuration data
On
Off
Configuration mode, IP address
is fixed: 192.168.0.10,
read/write the configuration
data is available
On
On
Reserved
Note: After re-configuring the switch, you have to restart the GT200-3HT-MT to make the settings take effect!
Off
On 1 2

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(Power off then Power on)
3.3.2 Internal / External Sampling resistor Switch
GT200-3HT-MT can choose using the internal sampling resistor or external sampling resistor to get the
HART signal. The specification of the internal resistor is 270Ω, 2W. When the power of the sampling resistor
exceeds 2W, you must use the external resistor.
Switch to ON, using the internal
sampling resistor
Switch to OFF, using the external
sampling resistor
3.4 Interface
3.4.1 Power Interface
GND
NC
24V+
1
2
3
Pin
Function
1
Power GND
2
NC(Not Connected)
3
24V+, DC Positive 24V

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3.4.2 Ethernet Interface
Ethernet interface use RJ-45 plug-in, its pin definition (standard Ethernet signal) is shown 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-
3.4.3 HART Interface
HART Channel 1

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HART Channel 2
HART Channel 3
Symbol
Function
HARTLOOP+
Connect HART signal positive
HARTLOOP-
Connect HART signal negative
NC
NC

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3-channel HART/Modbus TCP Gateway
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3.5 Topology of GT200-3HT-MT and Fieldbus Devices

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Note: 1. Some HART slave instrument need to perform self-test and other internal work when power is on, they
may not start HART communication, then gateway cannot receive the response data of the instrument right at this
moment. It is recommended the HART slave instrument and gateway uses separate power supply so that the
gateway can immediately establish communication with instrument.
2. When configuring HART commands in configuration software SST-HE-CFG, the commands need to be
configured according to the actual demands. To improve the speed of bus communication, it is recommended not
to configure the empty nodes (the nodes without connection) and empty commands (the actual unnecessary
commands).

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3-channel HART/Modbus TCP Gateway
GT 200-3HT-MT
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4 Software Instructions
4.1 Software Interface Description
SST-HE-CFG is a configuration software based on Windows platform, and used to configure HART series
products.
The following describes how to use the software SST-HE-CFG to configure the product GT200-3HT-MT.
You may also check the software user manual to get detailed usage.
Double-click on the icon to enter the main interface of software:
Tool Bar:
Network Settings
interface:
Contains Fieldbus and
the connection object
Menu Bar
Tool Bar
Title Bar
Parameter Settings
interface:
Contains modifiable
part (white) and
Comment field:
Explain the function of
the configuration
options

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3-channel HART/Modbus TCP Gateway
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Toolbar interface shown as follow:
The function from left to right is: New, Save, Open, AddNode, DelNode, DelCmd, Upload, Download,
AutoMap, Conflict, Export, Memory, Diagnose, Debug and Mode switch. GT200-3HT-MT doesn’t support
“Memory”, “Diagnose”, “Debug” and “Mode switch” function temporarily.
New: Create a new configuration file
Save:Save the configuration file
Open: Open the configuration file
AddChannel: This function can’t be used temporarily
DelChannel: This function can’t be used temporarily
AddNode: Add a HART slave node
DelNode: Delete a HART slave node
AddCmd: Add a HART command
DelCmd: Delete a HART command

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Upload: Read the configuration information from the module and shown in the software
Download: Download the configuration file to the gateway
AutoMap: Used to automatically calculate the mapped memory address without confliction by each
command
Conflict: To check whether there are some conflicts with configured commands in the gateway memory
data buffer
Export: Output current configuration to the local hard disk and saved as Excel spreadsheet form
Memory: Show the data exchange inside of the gateway.
Diagnose: through this function could analyze operating condition of fieldbus device; also it can finish
some certain analysis.
Debug: through this function could send any request frame to Hart fieldbus and show the response
information received in HART, convenient to debug. GT200-3HT-MT doesn’t support this function temporarily.
Mode switch: Specify that the operation of the gateway is debugging or configuring.