SST Automation GT200-HT-MT User manual

HART/Modbus TCP Gateway
GT200-HT-MT
User Manual
V 1.2
REV B
SST Automation
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 © 2020 by SST Automation Co., Ltd. All rights reserved.
Trademark
is the registered trade mark of SST Automation.
Technical Support Contact Information
www.sstcomm.com
E-mail: [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 Status Setting Switch........................................................................................................................... 4
2.3.2 Internal / External Terminal Resistor Switch...................................................................................... 5
2.4 Interface.......................................................................................................................................................... 5
2.4.1 Power Interface.................................................................................................................................... 5
2.4.2 Ethernet Interface.................................................................................................................................6
2.4.4 HART Interface....................................................................................................................................6
2.5 Topology of GT200-HT-MT and Fieldbus Devices....................................................................................... 7
3 Mounting....................................................................................................................................................................9
3.1 Mechanical Dimensions..................................................................................................................................9
3.2 Mounting Method........................................................................................................................................... 9
4 Quick Start Guide.....................................................................................................................................................11
4.1 Gateway Configuration.................................................................................................................................11
4.1.1 Connection......................................................................................................................................... 11
4.1.2 Configuration..................................................................................................................................... 11
4.2 Function Demo............................................................................................................................................. 14
5 Software Instructions............................................................................................................................................... 16
5.1 Software Interface Description.....................................................................................................................16
5.2 Software Functional Specifications..............................................................................................................18
5.2.1 Configure the Fieldbus...................................................................................................................... 18
5.2.2 Configure the HART Fieldbus...........................................................................................................19
5.2.3 Conflict Detection..............................................................................................................................26
5.2.4 Auto Mapping.................................................................................................................................... 27
5.2.5 Upload Configuration........................................................................................................................ 28
5.2.6 Download Configuration................................................................................................................... 30
5.2.7 Memory Data Display....................................................................................................................... 30
5.2.8 Diagnose............................................................................................................................................ 32
5.2.9 Switching Tools................................................................................................................................. 35
6 Working Principle.................................................................................................................................................... 36

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6.1 Flowchart of Executing One HART Command........................................................................................... 39
6.2 Universal Send and Receive Data................................................................................................................ 39
6.3 Trigger Command......................................................................................................................................... 40
6.4 Data Exchange with Modbus TCP............................................................................................................... 41

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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 Modbus
TCP side.
1.2 Product Features
Easy to use: The GT200-HT-MT can achieve seamless data communication with some 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
(270Ω/2W), and up to 15 HART instruments with external series resistor (250Ω/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;

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[6] Supports up to 100 HART commands. Max output data: 2000 bytes, max input data: 3000 bytes;
[7] Ethernet 10/100M adaptive. Supports IP address conflict detection and automatic routing functions;
[8] Supports up to 36 Modbus TCP servers and up to 512 commands at the same time;
[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℉~140℉(-20℃~60℃), Rel Humidity: 5%~ 95% (non-condensing);
[12] Mechanical dimensions(W*H*D):1.57 in*4.92 in*4.33 in(40mm*125mm*110mm);
[13] Mounting: 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.sstcomm.com.
1.5 Revision History
Revision
Date
Chapter
Description
REV A
02/11/2017
ALL
V1.2_Rev A new release,
add the memory data
display, diagnosis, mode
selection and other
functions, increase the
4.2.7, 4.2.8 chapters.
REV B
11/16/2020
ALL

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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
24VDC Interface
DIP Switch
Switch of series resistor
Ethernet interface
Status indicators

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2.2 LED Indicators
LED
State
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 Status Setting Switch
Status setting switch is located at the bottom of the GT200-HT-MT.
Debugging (Bit 1)
Configuration (Bit 2)
Description
Off
Off
Running mode, configuration
enable
Off
On
Running mode, configuration
disable
On
Off
Configuration mode, with fixed IP
address 192.168.0.10
On
On
Reserved
Notes: After changing the switch, you have to restart the GT200-HT-MT to make the settings take effect!
Off
On 1 2

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2.3.2 Internal / External Terminal Resistor Switch
The GT200-HT-MT has an internal series (270Ω/2W) resistor required for HART channel, supporting up to 13
HART instruments to be connected.
When the power of the series resistor is more than 2W, you must use an external series resistor (250Ω/3W),
supporting up to 15 HART instruments to be connected.
Switch to ON to use the internal series
resistor
Switch to OFF to use the external
series resistor
2.4 Interface
2.4.1 Power Interface
GND
NC
24V+
1
2
3
Pin
Function
1
Power ground
2
-
3
+24V DC

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2.4.2 Ethernet Interface
Ethernet interface uses RJ-45 plug-in; its pin (standard Ethernet signal) is defined as below:
Pin
Signal description
S1
TXD+
S2
TXD-
S3
RXD+
S4
-
S5
-
S6
RXD-
S7
-
S8
-
2.4.4 HART Interface
HART Channel
Pin
Function
HART LOOP+
HART signal +
HART LOOP-
HART signal -
NC
-

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2.5 Topology of GT200-HT-MT and Fieldbus Devices

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Notes:
1. It is recommended to use the separate power supply for the HART instruments and the GT200-HT-MT, to
ensure the stable communication.
2. To improve the communication efficiency of fieldbus, it is recommended not to configure the empty node in
SST-HE-CFG software or useless commands.

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3 Mounting
3.1 Mechanical Dimensions
Size: 1.57 in (width)*4.92 in (height)*4.33 in (depth)
3.2 Mounting Method
Using 1.38 in (35mm) DIN RAIL

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Installing the gateway
Unloading the gateway

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4 Quick Start Guide
4.1 Gateway Configuration
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 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)”, select "Add Command" and add Command ID1 box (double click on “Command
ID1” or select "Command ID1" and click "»"). Click OK.
9. Click “Command ID1” and configure the parameters as below:

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10. Click the download icon . Select the port and click Download:
4.2 Function Demo
The HART interface of the GT200-HT-MT is connected with a 2-wire HART instrument with address 0. The
Ethernet interface is connected to the PC. The configured Modbus Poll software can simulate as a Modbus TCP
client. You can see the main variable value of the HART instrument in data window:

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5 Software Instructions
5.1 Software Interface Description
SST-HE-CFG is the configuring software based on Windows platform, used to configure HART series gateway.
Open the SST-HE-CFG and enter the main interface of software:
Tool Bar:
Equipment section:
You can choose the field bus or
subnet, and add the nodes and
commands.
Menu Bar
Tool Bar
Configuration section:
Input configuration parameters.
The gray parts can’t be modified.
Notes section:
The specific explanation of the
configuration parameters.