SST Automation GT200-HT-MT User manual

HART / Modbus TCP Gateway
GT200-HT-MT
User Manual
V 1.2
Rev E
SST Automation
Email: [e-mail]
[e-mail]
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Important Information
Warning
The data and examples in this manual cannot be copied without authorization. SSTCOMM reserves the right to
upgrade the product without notifying users.
The product has many applications. The users must make sure that all operations and results are in accordance
with the safety of relevant fields, and the safety includes laws, rules, codes and standards.
Copyright
Copyright © 2022 by SST Automation. All rights reserved.
Trademark
is the registered trade mark of SST Automation.
Technical Support Contact Information
www.sstautomation.com
Email: [e-mail]

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Catalog
1 Product Overview ......................................................................................................................................................1
1.1 Product Function ............................................................................................................................................ 1
1.2 Product Features .............................................................................................................................................1
1.3 Technical Specifications .................................................................................................................................1
1.4 Related Products .............................................................................................................................................2
1.5 Revision History .............................................................................................................................................2
2 Hardware Descriptions .............................................................................................................................................. 3
2.1 Product Appearance ........................................................................................................................................3
2.2 LED Indicators ............................................................................................................................................... 4
2.3 Configuration Switch/Button ......................................................................................................................... 4
2.3.1 Configuration Switch .......................................................................................................................... 4
2.3.2 Resistor Switch ....................................................................................................................................4
2.4 Interface ..........................................................................................................................................................5
2.4.1 Power Interface ................................................................................................................................... 5
2.4.2 Ethernet Interface ................................................................................................................................ 5
2.4.3 HART Interface ................................................................................................................................... 6
2.5 Topology of GT200-HT-MT and HART Instruments ....................................................................................7
3 Hardware Installation ................................................................................................................................................ 9
3.1 Mechanical Dimensions ................................................................................................................................. 9
3.2 Mounting Method .........................................................................................................................................10
4 Quick Start Guide .................................................................................................................................................... 11
4.1 Start ...............................................................................................................................................................11
4.1.1 Connection .........................................................................................................................................11
4.1.2 Default Configuration ....................................................................................................................... 11
4.1.3 Configuration .................................................................................................................................... 12
4.2 Communication with Modbus TCP Client ...................................................................................................16
5 Software Instructions ...............................................................................................................................................20
5.1 Software Interface Description .................................................................................................................... 20
5.2 Software Functional Specifications ............................................................................................................. 22
5.2.1 Configure the Fieldbus ......................................................................................................................22
5.2.2 Configure the HART Fieldbus .......................................................................................................... 23
5.2.3 Conflict Detection ............................................................................................................................. 31
5.2.4 Auto Mapping ....................................................................................................................................32
5.2.5 Upload Configuration ........................................................................................................................33
5.2.6 Download Configuration ...................................................................................................................35
5.2.7 Memory Data Display ....................................................................................................................... 35
5.2.8 Diagnose ............................................................................................................................................36
5.2.9 Switching Tools .................................................................................................................................39
6 Working Principle ....................................................................................................................................................40

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6.1 Address Table ............................................................................................................................................... 40
6.2 Flowchart of Executing One HART Command ...........................................................................................43
6.3 Trigger Command ........................................................................................................................................ 43

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1 Product Overview
1.1 Product Function
The GT200-HT-MT achieves seamless communication between HART instruments and a Modbus TCP network.
The HART interface can be configured as a primary master or a secondary master. It acts as a server at the
Modbus TCP side.
1.2 Product Features
Easy to use: The GT200-HT-MT can achieve seamless data communication following simple steps.
Ethernet 10/100M adaptive.
Easy-to-use configuration software: The GT200-HT-MT can be configured by SST-HE-CFG software easily.
Debug function: The HART commands can be diagnosed in SST-HE-CFG, which greatly facilitates the
communication test.
1.3 Technical Specifications
[1] The HART interface can be configured as a primary master or the secondary master.
[2] The HART interface supports point-to-point mode and multi-drop mode.
[3] Supports one HART channel.
In point-to-point mode, the GT200-HT-MT supports burst communication.
In multi-drop mode, up to 13 HART instruments can be connected with an internal series resistor
(270Ohm/2W), and up to 15 HART instruments with external series resistor (250Ohm/3W).
[4] Supports all commands of the HART protocol.
[5] Each HART command can be configured to different outputting mode: change-of-state output, polling output,
initialization output or disable output.
[6] Supports up to 100 HART commands. Max output data: 2000 bytes, max input data: 3000 bytes.

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[7] Ethernet 10/100M adaptive. Supports IP address conflict detection and automatic routing functions.
[8] Supports connection with up to 36 Modbus TCP clients and 512 requests simultaneously.
[9] The Ethernet interface can be configured as a Modbus TCP server, supporting function codes:03H, 04H, 06H,
10H.
[10] Power supply: 24VDC (11V~30V), <100mA (24VDC).
[11] Working temperature: -4°F~140°F(-20°C~60°C). Rel Humidity: 5%~ 95% (non-condensing).
[12] Dimensions(W*H*D): 1.6 in*5.0 in*4.4 in (40mm*125mm*110mm).
[13] Installation: 1.38 in (35mm) DIN RAIL.
[14] Protection Level: IP20.
1.4 Related Products
The related products include: GT200-3HT-RS and GT200-HT-DP etc.
If you want to get more information about related products, please visit SSTCOMM website:
www.sstautomation.com.
1.5 Revision History
Revision
Date
Chapter
Description
V1.2, Rev A
02/11/2017
ALL
Add description for chapter 4.2.7,
4.2.8.
V1.2, Rev B
11/16/2020
ALL
V1.2, Rev C
12/25/2020
Chapter 5
V1.2, Rev D
7/23/2021
Chapter 4, 6
New chapter 4.2. Address table
revised.
V1.2, Rev E
07/01/2022
Chapter 5
Add HART Common Commands (ID
1 and ID 3) to this section

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2 Hardware Descriptions
2.1 Product Appearance
Notes: This picture is for reference only. The product appearance is subject to the actual product.
HART Interface
Power Interface
DIP Switch
Resistor Switch
Ethernet interface
HART Indicators
Ethernet Indicators

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2.2 LED Indicators
LED
State
Description
TX
Flashing
HART channel is sending data
OFF
No data sending
RX
Flashing
HART channel is receiving data
OFF
No data is received
NS
OFF
Communication error in Modbus TCP network
Flashing
Communication running
MS
Red
IP address conflicts
Red, flashing
Connection is OFF / Configuration Mode / DHCP,
BOOTP, IP address conflict detection
Red, flashing
(For 3 seconds)
Connection is OFF
2.3 Configuration Switch/Button
2.3.1 Configuration Switch
Configuration switches are located at the bottom of the GT200-HT-MT.
Mode (Bit 1)
Function (Bit 2)
Description
Off
Off
Running mode, configuration enable
Off
On
Running mode, configuration disable
On
Off
Configuration mode, IP is fixed at
192.168.0.10
On
On
Reserved
Note: To apply mode switching, restart the gateway.
2.3.2 Resistor Switch
The GT200-HT-MT has an internal series (270Ohm/2W) resistor required for HART channel, supporting up to 13
HART instruments to be connected.
Off
On 1 2

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When the power of the series resistor is more than 2W, you must use an external series resistor (250Ohm/3W),
supporting up to 15 HART instruments to be connected.
Switch to ON, using the internal series resistor
Switch to OFF, using the external series resistor
2.4 Interface
2.4.1 Power Interface
GND
NC
24V+
1
2
3
2.4.2 Ethernet Interface
The Ethernet interface is a RJ-45 connector, 10/100M adaptive.
Pin
Description
1
Power ground
2
Not connected
3
+24V DC
Pin
Description
S1
TXD+, Transmit Data+, Output
S2
TXD-, Transmit 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-

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2.4.3 HART Interface
1
2
3
HART LOOP+
HART LOOP-
NC
Signal
Description
HART LOOP+
Connected to HART signal+
HART LOOP-
Connected to HART signal-
NC
Not connected

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2.5 Topology of GT200-HT-MT and HART Instruments
Notes:
1. It is recommended to use the separate power supply for the HART instruments and the GT200-HT-MT, to
ensure stable communication.
2. To improve the communication efficiency of the field bus, it is recommended not to configure the empty
node in SST-HE-CFG software or useless commands.
3. If there are two or more HART instruments connected in the same network, their HART LOOP wires should
be connected parallel with others.

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3 Hardware Installation
3.1 Mechanical Dimensions
Size: 1.6 in (width) *5.0 in (height) *4.4 in (depth)

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3.2 Mounting Method
Using 1.38 in (35mm) DIN RAIL.
Install the gateway
Uninstall the gateway
1. Use a screwdriver to pass through the DIN RAIL bar, pull down and hold.
2. Pull out the gateway.
3. Lift up the gateway.
①
②
③

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4 Quick Start Guide
4.1 Start
4.1.1 Connection
1. Set the setting switch to Bit1 ON and Bit2 OFF.
2. Connect the GT200-HT-MT with PC in Ethernet interface.
3. Power on the GT200-HT-MT. Now the IP address of the gateway is fixed 192.168.0.10 and it is configurable.
4.1.2 Default Configuration
1. Open the SST-HE-CFG software installed on your computer.
2. Click “Upload” and “Sign In” to the gateway.
3. You will see the factory default configuration settings are shown below:
*Notice that there are already two commands and the IP Address is preset to the configuration IP address, you can
edit these parameters for your needs.
Command ID1 is pre-configured to read the PV. (For your reference, the default configuration of this command

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are shown below.)
Command ID3 is pre-configured to read the PV, SV, TV, and QV. (For your reference, the default configuration
of this command are shown below.)
4.1.3 Configuration
1. Open the SST-HE-CFG software installed on your computer.
2. Click "Fieldbus" in the "Mode" item on the right and choose “Modbus TCP”.
3. Select "Serial setting" in "config" menu.

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4. Click "OK". Select the gateway and sign in.
5. Select the "Fieldbus" on the left and configure the parameters as below.
6. Click the HART channel on the left, configure the parameters as below:

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7. Right click the channel, select “Add Node”:
8. Right click on “Node(0)” and select "Add Command" and add Command ID1 box (double click on “Command
ID1” or select "Command ID1" and click "»"). Click OK.

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9. Click “Command ID1” and configure the parameters as below:
10. Click the download icon . Select the port and click Download:

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4.2 Communication with Modbus TCP Client
The GT200-HT-MT is able to connect HART instruments to Modbus TCP network. It works as a Modbus TCP
server. The following example shows how the GT200-HT-MT communicate with Modbus Poll (a Modbus
simulator software).
1. Configure the GT200-HT-MT with some HART nodes and commands. In this example, the GT200-HT-MT
is configured with HART command 1, 3 and 54 of one node.
(1) Command 1: All the response data bytes can be read by the Modbus TCP client.
(2) Command 3: Advanced configuration mode. Only No.5-8, 10-13 and 15-18 bytes can be read and others
are filtered. The remained bytes are secondary, tertiary and quaternary variables.