SST Automation GT200-HT-RS User Manual

HART/ Modbus Serial Gateway

GT200-HT-RS

User Manual

V 2.3 REV B

SST Automation

E-mail: SUPPORT@SSTCOMM.COM

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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 Parameters........................................................................................................... 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 DIP Switch/Button........................................................................................................................................12

3.3.1 DIP Switch.........................................................................................................................................12

3.3.2 Modbus Address Setting Button........................................................................................................13

3.3.3 Internal/External Sampling Resistor Switch..................................................................................... 13

3.4 Interface........................................................................................................................................................ 14

3.4.1 Power Interface..................................................................................................................................14

3.4.2 RS-485/RS-422 Interface.................................................................................................................. 14

3.4.3 RS-232 Interface................................................................................................................................15

3.4.4 HART Interface..................................................................................................................................16

3.4.5 Mini B Type USB.............................................................................................................................. 16

3.5 Topology of GT200-HT-RS and Fieldbus Devices......................................................................................17

4 Software Instructions............................................................................................................................................... 19

4.1 Software Interface Description.....................................................................................................................19

4.2 Software Functional Specifications..............................................................................................................21

4.2.1 Connect with the Hardware............................................................................................................... 21

4.2.2 Upload configuration.........................................................................................................................22

4.2.3 Configure the Fieldbus...................................................................................................................... 22

4.2.4 Configure the HART Fieldbus...........................................................................................................25

4.2.5 Conflict Detection..............................................................................................................................32

4.2.6 AutoMap............................................................................................................................................ 33

4.2.7 Download Configuration................................................................................................................... 33

4.2.8 Memory Data Display....................................................................................................................... 33

4.2.9 Diagnose............................................................................................................................................ 34

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4.2.10 Serial Debug.................................................................................................................................... 38

4.2.11 Switching Tools............................................................................................................................... 39

4.2.12 Use USB Port...................................................................................................................................40

5 Working Principle.................................................................................................................................................... 45

5.1 Flowchart of Executing One HART Command........................................................................................... 48

5.2 Universal Send and Receive Data................................................................................................................ 48

5.3 Trigger Command......................................................................................................................................... 49

5.4 Data Exchange with Modbus........................................................................................................................50

6 Installation................................................................................................................................................................51

6.1 Machine Dimension......................................................................................................................................51

6.2 Installation Method.......................................................................................................................................51

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1 Product Overview

 Powerful Serial function: Support the interconnection between HART and Modbus , also support transparent

 Multi debugging functions: It can display the exchanging data, and diagnosis the HART command

[1] Used as a primary or a secondary HART master;

[2] Supports one HART-channel, under multi-point mode, support connecting at most 13 HART slaves with

[3] Supports single-point and multi-point mode at the HART side;

[4] Under single-point mode, support 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

[7] Supports up to 128 HART commands, HART output data buffer is up to 1000 bytes, and the input data buffer

[8] Supports an internal or external HART sampling resistor;

[9] Supports serial RS-232, RS-485 and RS-422, baud rate supports: 300, 600, 1200, 2400, 4800, 9600, 19.2K,

1.1 Product Function

GT200-HT-RS is a gateway that can provide a seamless connection between HART and Modbus. At HART

side it can be configured as a primary master or the secondary master, and acts as slave at the Modbus side.

1.2 Product Features

transmission between HART and serial port.

1.3 Technical Specifications

gateway internal resistor and support connecting 15 HART slaves with an external resistor (250Ω);

disable output;

is up to 1600 bytes;

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38.4K, 57.6K, 115.2Kbps;

[10] The serial port can be configured as Modbus slave, supports modbus function code: 03H, 04H, 06H, 10H;

[11] Modbus slave supports RTU and ASCII communication;

[12] The serial port can be configured as universal mode, and achieve transparent data transmission with HART

[13] Power: 24VDC (9V~30V), 80mA (24VDC);

[14] Working circumstance temperature: -4℉~140℉(-20℃~60℃), Humidity: 5%~ 95%;

[15] External dimensions (W*H*D): 0.98 in*3.94 in *3.54 in (25mm*100mm*90mm);

[16] Installation: 1.38 in (35mm) DIN RAIL;

[17] Protection Level: IP20;

Revision

Date

Chapter

Description

REV A

21/9/2015

All

New software version

REV B

1/4/2016

All

Hardware Update

slave devices;

1.4 Safety and Explosion-Proof Features

GT200-HT-RS 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-HT-DP, GT200-DP-RS etc.

If you want to get more information about these products, please visit SSTCOMM website:

http://www.sstcomm.com.

1.6 Revision History

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2 Quick Start Guide

1. Turn gateway’s configuration bit of DIP switch(refer to chapter 3.3.1) to “ON”;

2. Connect the Gateway’s RS-232/USB interface and the serial port of the computer with a serial cable, wiring

3. Power on the gateway, the LED display shows “CF”, indicates that the gateway is in the configuration mode.

1. Run the SST-HT-CFG software installed on your computer.

2. Click “Fieldbus” in the tree view on the left, the configuration table is shown on the right as below:

The following example introduces the use method of the Gateway.

2.1 Configuration of Gateway Parameters

2.1.1 Pre-configured Settings

methods see chapter 3.4.3 of this manual;

Run the SST-HT-CFG to start the gateway configuration.

2.1.2 Software Configuration

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3. Click “HartChannel0” in the tree view on the left, the configuration table is shown on the right as below:

Note: HART protocol specifies that the slave device which address is 0 must work in single-point mode. In

single-point mode the digital communication and analog communication is allowed to exist at the same time. The

Slave with address 1~15 works in multi-point mode. In multi-point mode the analog output of the device is the

minimum value (e.g. 4mA), only allows digital communication. The protocol also specifies that the default factory

address of field device is 0.

4． Right-click HartChannel0, in the pop-up menu, select “Add Node”, as shown below:

5． Right-click “Node(0)”, in the pop-up menu selects “Add Command” to add a command (Command ID1) in

the dialog box, and then click OK to return.

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6． Click the “Command ID1”, the configuration table on the right is configured as below:

7．Click the tool , in the pop-up dialog box, select the serial port that gateway is connected to the computer,

click OK and then click Download data:

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2.2 Function Demo

HART interface of the gateway connects with a 2-wire pressure transmitter with slave address 0, RS-485

interface is connected to the computer through RS-485/RS-232 converter, and computer with configured Modbus

POLL software can simulate to work as a Modbus master, then in data exchange window you can see the main

variable value of the pressure transmitter:

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3 Hardware Descriptions

HART Interface

LED Display

Power Interface

RS-485/RS-422

RS-232 Interface

DIP Switch

Serial State Indicator

HART State Indicator

Internal/External Sampling

Resistor Switch

Modbus Address Setting Button

Mini USB

3.1 Product Appearance

Note: This picture is for reference only. Product appearance should refer to the real object.

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3.2 Indicators

Indicator location

Indicator

State

State Description

Row 1

Blinking

Serial port data sending

OFF

No data is sending

Blinking

Serial port data receiving

OFF

No data is receiving

Row 2

Blinking

HART Bus data sending

OFF

No data is sending

Blinking

HART Bus data receiving

OFF

No data is receiving

Debugging (bit 1)

Configuration (bit 2)

Description

Off

Run Mode

Off

Configuration Mode

Off

Debug Mode

Configuration Mode

Off

On 1 2

3.3 DIP Switch/Button

3.3.1 DIP Switch

The DIP switch is located at the bottom of product, bit 1 is the debug bit and bit 2 is the configuration bit.

Note: ①After re-configuring the switch, you have to restart the GT200-HT-RS to make the settings take

effect! (Power off then Power On)

②Set to the debug mode, it will be compulsory to appoint RS-485 interface as communication

interface, RS-232/USB interface as debugging interface.

③Configuration interface uses the RS-232/USB interface.

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3.3.2 Modbus Address Setting Button

Switch to ON, using the internal

sampling resistor

Switch to OFF, using the external

sampling resistor

Under run mode of the GT200-HT-RS, LED display always displays the address of the current Modbus

address. Quickly press (double-click) the button twice in succession, the high bit starts to flash, and the low bit is

always on, click the button to add 1 to start setting the high bit of Modbus address. Long-press the button for 3

seconds, the high bit is always on, and the low bit starts to flash. Click the button to add 1 to start setting the low

bit of Modbus address. At last, long-press the button again for 3 seconds, the address flashing three times shows

that the address is set successfully. If no button action within ten seconds, GT200-HT-RS exits the status of setting

address and continue to display the original address. The configurable range of Modbus address is 0 to 99

(Decimal).

3.3.3 Internal/External Sampling Resistor Switch

GT200-HT-RS 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 is more

than 2W, you must use an external resistor.

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3.4 Interface

GND

24V+

Function

Power GND

NC(Not Connected)

24V+, DC Positive 24V

3.4.1 Power Interface

3.4.2 RS-485/RS-422 Interface

The RS-485 interface of GT200-HT-RS is a standard one, and the RS-485 characteristics of the product are

shown as follows:

1. The basic characteristics of RS-485 transmission technology

① Network topology: Linear bus, there are active bus terminal resistors at both sides.

② Transmission rate: 1200 bps~115.2Kbps.

③ Media: Shielded twisted-pair cable and also can cancel the shielding, depending on environmental

conditions (EMC).

④Site number: 32 stations per subsection (without repeater), and can increase up to 127 stations (with

repeater).

⑤Plug connection: 3/5-pin pluggable terminal.

2. The main points on the installation of RS-485 transmission equipment

①All the equipment are connected with RS-485 bus;

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②Each subsection can be connected up to 32 sites;

GND

D-

D+

5R-R+

Function

R-, RS-422 Receive Negative

R+, RS-422 Receive Positive

GND

D-, RS-485/RS-422 Transmit Negative

D+, RS-485/RS-422Transmit Positive

RXTXGND

③The farthest two end of the bus has a terminal resistor—120Ω 1/2W to ensure reliable operation of the

network.

Serial interface uses 5-pin pluggable open terminal and user can wire it according to the wiring instructions

on the panel.

5-pin terminal:

3.4.3 RS-232 Interface

RS-232 interface uses one 3-pin pluggable open terminal, and its pin description is shown as follows:

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Function

RX, Connect RS-232's RX of user device

TX, Connect RS-232's TX of user device

GND, Connect RS-232's GND of user

device

3.4.4 HART Interface

Function

Connect HART signal positive

Connect HART signal negative

Name

Function

VBUS

+5V

2D-Data negative

3D+Data positive

GND

Signal Ground

3.4.5 Mini B Type USB

Mini B type USB interface is defined as below:

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