3-channel HART/Modbus TCP Gateway
GT200-3HT-MT
User Manual
V 1.2 REV A
SST Automation
E-mail: SUPPORT@SSTCOMM.COM
WWW.SSTCOMM.COM
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
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
WWW.SSTCOMM.COM 2
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
5.4 Data Exchange with Modbus........................................................................................................................44
6 Installation................................................................................................................................................................45
6.1 Machine Dimension......................................................................................................................................45
6.2 Installation Method.......................................................................................................................................46
WWW.SSTCOMM.COM 3
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
1 Product Overview
Simple to use: users can refer to product manuals and application case to achieve communication in a short
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
The HART command and Modbus TCP parameters can be configured by configuration software.
[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
[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
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
time according to the requirements of the configuration;
exchange, HART slave command diagnostic functions greatly facilitate the user's communication test;
1.3 Technical Specifications
13 instruments with gateway internal resistor and supports connecting 15 instruments with an external
resistor (250Ω/2W);
WWW.SSTCOMM.COM 4
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
no output;
[7] Each channel of HART supports up to 100 HART commands, the output buffer up to 2000 bytes, and the
[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
[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
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.
input buffer up to 3000 bytes;
512 command request simultaneously;
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
WWW.SSTCOMM.COM 5
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
2 Quick Start Guide
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.
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
The following example introduces the use of the Gateway GT200-3HT-MT.
2.1 Configuration of Gateway
2.1.1 Pre-configured Settings
2.1.2 Software Configuration
pop-up menu;
WWW.SSTCOMM.COM 6
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
WWW.SSTCOMM.COM 7
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:
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
Note: In HART protocol, it specifies that the device with slave address 0 works under single point mode, it allows
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
9. Click “Command ID1”, the configuration table on the right is configured as below:
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.
box (double click “Command ID1” or select “Command ID1” and click “»”), click OK to return.
WWW.SSTCOMM.COM 8
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
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:
WWW.SSTCOMM.COM 9
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
WWW.SSTCOMM.COM 10
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
3 Hardware Descriptions
HART Channel1
24VDC Interface
HART Channel3
DIP Switch
Selecting switch of
sampling resistor
HART Channel2
Ethernet interface
Status indicators
3.1 Product Appearance
Note: This picture is for reference only. Product appearance should refer to the real object.
WWW.SSTCOMM.COM 11
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
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
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
OnOnReserved
Off
On 1 2
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.
Note: After re-configuring the switch, you have to restart the GT200-3HT-MT to make the settings take effect!
WWW.SSTCOMM.COM 12
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
(Power off then Power on)
Switch to ON, using the internal
sampling resistor
Switch to OFF, using the external
sampling resistor
GND
NC
24V+
1
2
3
Pin
Function
1
Power GND
2
NC(Not Connected)
3
24V+, DC Positive 24V
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.
3.4 Interface
3.4.1 Power Interface
WWW.SSTCOMM.COM 13
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
3.4.2 Ethernet Interface
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-
Ethernet interface use RJ-45 plug-in, its pin definition (standard Ethernet signal) is shown below:
3.4.3 HART Interface
HART Channel 1
WWW.SSTCOMM.COM 14
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
HART Channel 2
Symbol
Function
HARTLOOP+
Connect HART signal positive
HARTLOOP-
Connect HART signal negative
NC
NC
HART Channel 3
WWW.SSTCOMM.COM 15
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
3.5 Topology of GT200-3HT-MT and Fieldbus Devices
WWW.SSTCOMM.COM 16
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
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).
WWW.SSTCOMM.COM 17
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
4 Software Instructions
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
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:
WWW.SSTCOMM.COM 18
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
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
WWW.SSTCOMM.COM 19
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
command
data buffer
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
Conflict: To check whether there are some conflicts with configured commands in the gateway memory
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.
WWW.SSTCOMM.COM 20
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
4.2 Software Functional Specifications
4.2.1 Configure the Fieldbus
Click the “Fieldbus” in the tree view on the left, select “Modbus TCP” in the “Mode select” in the configuring
plate on the right and then click enter to confirm. It is shown below:
Here user can configure some parameters:
IP setting mode: Static configuration, BOOTP, DHCP optional;
IP address: Set the IP address of GT200-3HT-MT;
Subnet mask: Set the subnet mask of device;
Gateway address: Set the gateway address of device;
DNS1: Default 0;
DNS2: Default 0;
4.2.2Configure the HART Fieldbus
4.2.2.1 Set the parameters of HART channel
Click the HartChannel0 in the tree view, the configuration plate will be shown on the right:
WWW.SSTCOMM.COM 21
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
Master type: Primary master, Secondary master
Network mode: Select the networks link as single or multiple points, under the single point the gateway can only
communicate with the slave device whose address is 0;
Maximum repetitions: 0~5
Polling Enable: Enable or disable polling function is selectable, “Enable” means using polling function.
Delay between Polls: Set the polling time (Time interval between one command sending and beginning to send
next command), the range is 256~65535ms
Response timeout: Set the maximum time of waiting response from slave, the range is 256~65535ms
Input data timeout clear/keep: After HART command exceeds the setting no-response times, whether to clear input
data buffer area of HART
Timeout times: Set the timeout times
4.2.2.2 Add Slave Nodes
Click the selected HART channel, right click the mouse and select “Add Node” in the popup menu.
WWW.SSTCOMM.COM 22
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
Click the added node, set slave address in the right configuration plate, and please notice that HART channel can
only be equipped with one slave node whose address is 0.
Note: When configured node numbers are more than the actual connected devices, the redundant node will lead to
the longer time of polling circle; so, it is recommended that configured node numbers should corresponds with actual
devices.
4.2.2.3 Add Commands
Select the “Node ()”, Right click and select “Add Command” in the popup menu
WWW.SSTCOMM.COM 23
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
Choose the command you want in the popup menu, and then click “OK” to exit:
Note: the same command can only be configured once in one node.
WWW.SSTCOMM.COM 24
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
4.2.2.4 Configure Slave Commands
Change-of-state output: Execute this command once s data buffer of HART changes
Polling output: This order is put in the polling list, executed periodically
Initialization output: Execute the command only once when power is on
Disable output: the command will not be sent.
Click the command number in the tree view; you will see the configuration plate in the right place:
Mode of outputting command: You can use the execution way of the command, change-of-state, polling output,
Initialization output and disable output optional;
Set starting address of sending data: 3000~4999;
The register starting address of sending data: the property is automatically calculated by gateway, used for register
addressing;
Sending data length (BYTE): used to set the length of output data by this command;
Sending data length (WORD): the property is automatically calculated by gateway, used for user checking output
data length, 1 word=2 byte;
Memory starting address of receiving data: set the memory address of input data by this command. Response data
only includes data area of HART frame;
The register starting address of receiving data: the property is automatically calculated by gateway, used for
register addressing;
Receiving data length (BYTE): set the length of input data by this command;
Receiving data length (WORD): the property is automatically calculated by gateway, used for user checking
WWW.SSTCOMM.COM 25
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
output data length, 1 word=2 byte;
Command index: the property is automatically calculated by gateway, it indicates the index in the configured
command list this command belongs to.
4.2.2.5 Delete Commands
Select the command need to be deleted, Right click the mouse and click “Delete Command”. Through the menu
command can also be the same action.
4.2.2.6 Delete Nodes
Select the node needed to be deleted, Right click the mouse and click “Delete Node”. Through the menu command
can also be the same action.
4.2.2.7 Advanced Options to Configure Slave Commands
When using HART command configuration, sometimes users want to get one part data of one command. For
example, No.1 HART command. The float value of main variable is only needed, no need to get unit of main
variable, this is why advanced option exists. Advanced options is actually the execution of “segment mapping
function”, it cut the response data of HART command and get the segment data. Users can get any part data they
want. Below is the interface of Advanced Options:
WWW.SSTCOMM.COM 26
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
This interface details is described in chapter 4.2.2.4, so here we don’t describe it. The below is the example
of No.3 HART command, to show how to use “Segment Mapping” function, we can see one “configuration”
button after the “receive data project configuration” option, click it:
There are many parts in “Bytes”. For example, “Command Status” means the communication status and
relevant code of HART response command, “Byte0-3” means byte 0 to 3 of data area of HART response
command, and so on.
WWW.SSTCOMM.COM 27
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
In the above example, click “Byte5-8” will show the Primary Variable in the left bottom area. Other column
have the relevant explanation.
First to explain the “Mapped Address”:
Bytes: response bytes of “Response Data”;
Memory Address: assigned memory address which this byte is located in memory buffer area of
GT200-3HT-MT;
Modbus register address: the relevant Modbus register address of “Memory Address”; Note: this address is
not a single address, that is the same memory area which it occupied.
Byte swap: there are two options, “no swap” and “register swap”, swap option is only valid to float type data.
When using “no swap”, the byte order is byte1, byte2, byte3 and byte4. After using “register swap”, the byte order
will be byte3, byte4, byte1 and byte2. For example, the original data is 0x12345678, it will be 0x56781234 after
using “register swap”.
Choose “Byte0-3” and “Byte5-8”, click auto mapping, as shown below:
Close the dialog box, download the configuration into GT200-3HT-MT.
Others are the same with “Basic Mode”.
WWW.SSTCOMM.COM 28
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
4.2.3 Conflict Detection
Conflict detection is used to check the distribution condition of the input and output data of all commands stored in
the memory.
Click icon will show the conflict detection interface as follow:
The left side is configuration commands, the right side is data memory address including receive data storage
address and send data storage. Upper side is memory distribution of the HART’s sending data; lower side is memory
distribution of the HART’s receiving data. When one memory unit is configured with two commands or more, the
memory unit will display red color. When the distributed memory exceeds the defined scale of gateway, the exceeding
part will display yellow color. White color area shows the usable memory. Green color area indicates occupied memory.
Clicking one command, the distribution chart shown in blue will show the storage location of input/output data.
4.2.4 AutoMap
Automap will automatically distribute the memory with no confliction according to the input/output bytes
WWW.SSTCOMM.COM 29
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
number by users’ commands.
Select the configuration interface:
Show the “Ethernet configuration” interface as below:
You should set the correct input/output bytes for each commands, then click label, select “yes” in the popup
menu.
4.2.5 Upload Configuration
When checking “Use search function”, it will search all identifiable hardware when the software is
WWW.SSTCOMM.COM 30
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
communicating with the hardware and will be shown in the device list:
Select the device, click “Sign in” to connect the device.
Click the upload icon again, pop up the dialog box below:
Click “Upload data” button.
When not checking “Use the search function”, it will only search appointed hardware and only show this
hardware in the device list.
WWW.SSTCOMM.COM 31
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
Now, user can upload the configuration of GT200-3HT-MT into the software and shown in the software.
4.2.6 Download Configuration
After configuring the command, click button, pop up the dialog box below:
Click download data is ok.
Note: Before downloading, please confirm all configuration data are correct.
4.2.7 Memory Data Display
Show the data exchange inside of the gateway, users can use this function to debug the HART fieldbus in the
absence of the EtherNet/IP side. Steps are as follows:
1） First, dial the DIP switch of GT200-3HT-MT to "1OFF2OFF", then power on again. At this moment
GT200-3HT-MT is in running mode.
2） Use a network line to connect the GT200-3HT-MT's RJ-45 port and computer. Open the software
"SST-HE-CFG", Click "Tool—Select Mode" and choose debug mode and then click on the icon , you can
WWW.SSTCOMM.COM 32
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
also click to choose debug mode. Choose the correct gateway in the device scanning window, interface is
as follows:
As is shown in the table, upper table shows the memory distribution of HART input data, lower table shows
the output data. When you need to change the output data, click the "stop" button firstly, then change the related
data or load the already saved data table, at last, click the "sending data".
4.2.8 Diagnose
The device diagnostics function allows the user to know which devices are not communicating properly, the
execution of commands assigned, the status of the gateway's data transmission and reception, the display of
specific commands, and the real-time display of HART device data. The steps are as follows:
WWW.SSTCOMM.COM 33
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
1) First, dial the DIP switch of GT200-3HT-MT to "1OFF2OFF", then power on again. At this moment
GT200-3HT-MT is in running mode.
2) Connect the network port of GT200-3HT-MT to the computer, open the HTConfig software, click debug
mode pop up the dialog box "Tools -> Select Mode", then select the diagnose in the tool or click the icon
, select the debug mode, click OK, and then click software pop up a dialog box to
upload the gateway configuration, as shown below:
3) Click "Upload Data" to pop up the following picture:
WWW.SSTCOMM.COM 34
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
4) Click "OK" to enter the diagnostic interface:
Click "Channel 1" in this interface, the right side of the gateway will display the status of the HART bus
section, click "Update" will refresh the data once, click "Reset" will clear the system status, click " periodically
refresh", the software will update the data in 500ms.
5) Click Node (x) appears below:
This screen shows the response status of the configured command.
WWW.SSTCOMM.COM 35
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
Click "Update" will refresh these command status, "Cycle Update" will update the command status
500ms
6) Double-click 0, 1, 2, 3, 6, 11, 12, 13, 14, 15, 16, 17, 18, 19 commands will pop up their command
information, input 6, 17, 18, 19 commands.
Double click "CMD0" to pop up the following window:
Click "Update" to update the data, "Edit" in the read-only command does not work.
4.2.9 Switching Tools
In the “Tools” menu, there are two practical tools: They are used to switch between IEEE754 and PACKED ASCII
conveniently.
WWW.SSTCOMM.COM 36
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
WWW.SSTCOMM.COM 37
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
5 Working Principle
Gateway
memory
address
Corresponding
Modbus register
address
Data shift
offset in
channel
Read/write
permission
Description
Three
HART
channel
sharing
memory
0-2999
0-1499
readable
The HART data input
area
3000-499
9
1500-2499
readable,
writable
The HART data output
area
HART
channel 1
5000-501
9
800-809
0-19
readable
Device 0_cmd0 data
5020-503
9
810-819
20-39
Device 1_cmd0 data
……
……
……Device 15_cmd0
data
5320
960H
320
Gateway status
5321
960L
321
Gateway HART port
sending times
5322
961H
322
Gateway HART port
receiving times
5323
961L
323
HART communication
error times
1924-194
3
962-971
Reserved
5324
972H
324
Device 0_cmd0
response status
5325
972L
325
The response status of
device 1_cmd0 的
……
……
……The response status
Device15 _cmd0
5340-543
980-1059
340-439
The response status of
The gateway internally opens up a length of 8156 bytes of memory as input and output buffers which
exchange data. 0 ~ 4999 memory is used as the storage area of the HART input data and output data. 5000~8155
memory is used as the storage area of the status of three HART channel and control variables. The specific
assignment is shown in the table below:
WWW.SSTCOMM.COM 38
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
9
user command
5440
1060-1195
Reserved
5440
1196H
440
Universal receiving
label
5441
1196L
441
Universal receiving
error counter
5442-54431197
442-443
Universal receiving data
length
5444-574
3
1198-1347
444-743
Universal receiving data
2696-2999Reserved
3000-399
9
0000-0499
HART data output area
5744
0500H
744
readable,
writable
Reset to send, receive,
error counter
5745
0500L
745
Polling enabled
5746
0501H
746
Trigger label
5747
0501L
747
Trigger command
4004-426
9
0502-0634
Reserved
5748
0635H
748
Universal sending label
5749
0635L
749
Universal mode enabled
5750-57510636
750-751
Universal sending data
length
5752-605
1
0637-0786
752-1051
Universal sending data
HART
channel 2
6052-710
3
Same as
HART 1
HART channel 2
status/control variable,
same as channel
1HART
HART
channel 3
7104-815
5
Same as
channel 1
HART channel 3
status/control variable,
same as channel 1
The HART data input area: Store the data that HART slave device sends to gateway. All command response
data of HART channel will be mapped here.
The HART data output area: Store the data that the gateway sends to the HART slave device. All HART
WWW.SSTCOMM.COM 39
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
command will get the output data here.
Device 0_cmd0~ Device 15_cmd0: When operating one slave command for the first time, the gateway
Gateway status: The gateway status indicates the state of the gateway in the HART network, defined as:
Sending times of HART channel: The HART Transmit counter
Receiving times of gateway HART port: The HART Receive counter
Communication error times of HART channel: The HART Receive Error counter
Device 0_cmd0~ Device 15_cmd0’s response status: Show the response status of the internal command
The response status of the user command: Show the response status of the user commands
Universal Receiving label: The receive label under the universal model, this value changing one time
Universal Receiving data length: Indicates the received data length in the universal mode
Universal Receiving Error Counter: Show that the universal received error number
Universal receiving data: Store the received data of HART port under the universal mode
Reset to send, receive, error counter: The gateway control signal, when the value of memory changes,
Polling enabled: This bit is readable and writable, writing 1 enables the polling output, writing 0 disables
internally will automatically execute the No. 0 command to obtain the device information (to obtain the long
address). The response data of this internal command is stored in this area.
0---- No HART communications.
1----Sending
2---- Waiting for a response
3---- Handing a response
Command state is defined:
0---- Not executed
1---- The correct response
2---- Parity error
3---- No response
4---- Error defined in agreement
5----No connection
indicates that HART port receives a HART frame
gateway causes all the counter to 0
polling output; Reading 1 indicates that the polling state is enabled, 0 indicates that the polling is in the
WWW.SSTCOMM.COM 40
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
disabled state
Trigger label: Changing the value will result in a trigger operation
Trigger command number: Command number executed by trigger operation
Universal mode enabled: The value of 1 indicates a universal transfer function is enabled, otherwise disabled
Universal sending label: The transfer label under the universal mode, this value changes in time will lead to
Universal sending data length: The length of the sending data under the universal mode
Universal sending data: the data need to send under the universal mode
Register address calculation formula: Memory address=the original memory address of HART channel+the
universal transfer function
send a HART frame
offset of register; Modbus register address=Memory address/2 (integral part of the result indicates register
address, the remainder indicates the low bit of register address, otherwise it is the high bit). For example, the
memory address of No.2 HART channel status is: 6052+320=6372. Relative Modbus register address is:
6372/2=3186H
WWW.SSTCOMM.COM 41
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
5.1 Flowchart of Executing One HART Command
Initialization
output
Satisfy the
polling output
Satisfy Change
of state output
Meet the
trigger output
Execute
command
Input Data
Output Data
Field
instruments
Data
State
Data
Slave's
response
Y
The next
command
Current command
N
N
N
N
Sent to the slave
command frame
Quit
5.2 Universal Sending and Receiving Data
User can visit/read universal receive/transfer control variable in order to start the “transparent transmission”
with one HART channel. The detailed steps are as below:
WWW.SSTCOMM.COM 42
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
06H command " universal
mode enable" bit is 1
10H command will write the data
to a continuous region which
address begins from “Universal
mode send data”
The length of the data written to
"The universal send data length"
address with 06H command
06H command to change "the
Universal send data label”
The gateway stores the received HART frame in a continuous region whose starting address is "the Universal
receiving data" and writes the length of the received data in the "Universal receiving data length". Then change
the value of “universal receiving label". If any data is not received within the response waiting time, "universal
receiving error counter" will plus 1. Before sending the universal frame, all users should read the universal
receiving label and the error counter. After finishing the universal frame, it needs to read these two values
continuously until one of them changes.
5.3 Trigger Command
Users can trigger any HART command which is configured by gateway through Modbus TCP. The specific
approach is: appointing Modbus register address to “trigger command ID” of one channel; using No.6 command
of Modbus to write the user trigger command number (when using SST-HE-CFG to configure commands, the
software will automatically calculate and display) to the "trigger command number". Then rewriting "the trigger
label" can trigger the value to change and trigger the gateway to finish a trigger operation. Parts of response data
in the device will be stored to "the receiving data memory" which specified by this command number.
WWW.SSTCOMM.COM 43
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
5.4 Data Exchange with Modbus
When fieldbus is configured as "Modbus TCP", user can exchange data, inquire the status of gateway and
manage according to the corresponding address of gateway in the internal input and output buffer; Also you can
do some trigger operation and transmission of universal frame.
WWW.SSTCOMM.COM 44
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
6 Installation
6.1 Machine Dimension
Size: 1.57 in (width)*4.92 in (height)*4.33 in (depth)
WWW.SSTCOMM.COM 45
User Manual
3-channel HART/Modbus TCP Gateway
GT 200 -3 HT-MT
6.2 Installation Method
Installing the gateway
Unloading the gateway
Using 1.38 in (35mm) DIN RAIL
WWW.SSTCOMM.COM 46
Loading...