SST Automation GT200-DN-RS User manual

Modbus/DeviceNet Gateway
GT200-DN-RS
User Manual
REV 1.4
SST Automation
E-mail: [e-mail]
WWW.SSTCOMM.COM

User Manual
Modbus/DeviceNet Gateway
GT200-DN-RS
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Catalog
1 About This Document................................................................................................................................................ 4
1.1 General............................................................................................................................................................ 4
1.2 Important User Information............................................................................................................................4
1.3 Terms...............................................................................................................................................................4
2 Product Overview...................................................................................................................................................... 5
2.1 Product Function.............................................................................................................................................5
2.2 Product Features............................................................................................................................................. 5
2.3 Technical Specification...................................................................................................................................5
2.4 Attention..........................................................................................................................................................7
2.5 Related Products............................................................................................................................................. 7
3 Product Appearance................................................................................................................................................... 8
3.1 Indicators.........................................................................................................................................................8
3.2 Status Setting Switches and LED................................................................................................................... 9
3.2.1 Status Setting Switches........................................................................................................................9
3.2.2 Setting Switches of DeviceNet Address............................................................................................10
3.2.3 LED....................................................................................................................................................10
3.3 Communication Interface............................................................................................................................. 11
3.3.1 Modbus Interface............................................................................................................................... 11
3.3.2 DeviceNet Interface...........................................................................................................................12
4 Use Method..............................................................................................................................................................13
4.1 Quick Start Guide......................................................................................................................................... 13
4.2 Hardware Wiring...........................................................................................................................................14
4.3 Software Configuration................................................................................................................................ 14
4.4 Run................................................................................................................................................................14
4.4.1 Data Exchange Mode.........................................................................................................................14
4.4.2 Terminal Resistor...............................................................................................................................15
5 Software Instructions............................................................................................................................................... 16
5.1 Notes before Configuration.......................................................................................................................... 16
5.2 User Interface................................................................................................................................................16
5.3 Device View Operation.................................................................................................................................18
5.3.1 Device View Interface....................................................................................................................... 18
5.3.2 Operation Mode................................................................................................................................. 18
5.3.3 Operation Types.................................................................................................................................19
5.4 Configuration View Operation..................................................................................................................... 20
5.4.1 Interface of Fieldbus Configuration.................................................................................................. 20
5.4.2 Interface of Subnet Configuration..................................................................................................... 21
5.4.3 Interface of Node Configuration....................................................................................................... 23
5.4.4 Interface of Command Configuration............................................................................................... 23
5.4.5 Comment Interface............................................................................................................................ 25

User Manual
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5.5 Conflict Detection.........................................................................................................................................25
5.5.1 Operation of Command List..............................................................................................................26
5.5.2 Operation of Memory Mapping Area................................................................................................26
5.6 Hardware Communication............................................................................................................................27
5.6.1 Serial Configuration.......................................................................................................................... 27
5.6.2 Upload Configuration........................................................................................................................ 28
5.6.3 Download Configuration................................................................................................................... 28
5.7 Load and Save Configuration....................................................................................................................... 29
5.7.1 Load Configuration Project............................................................................................................... 29
5.7.2 Save Configuration Project................................................................................................................29
5.8 Export Excel File.......................................................................................................................................... 30
5.9 Monitor I/O Data.......................................................................................................................................... 31
6 Installation................................................................................................................................................................34
6.1 Machine Dimension......................................................................................................................................34
6.2 Installation.....................................................................................................................................................34
7 Instructions of DeviceNet I/O and parameters........................................................................................................ 36
7.1 I/O Configuration..........................................................................................................................................36
7.2 DeviceNet Parameters.................................................................................................................................. 36
7.3 DeviceNet Network Configuration Instructions...........................................................................................37

User Manual
Modbus/DeviceNet Gateway
GT200-DN-RS
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1 About This Document
1.1 General
This document describes every parameter of the gateway GT200-DN-RS and provides using methods and
some announcements that help users use the gateway. Please read this document carefully before using the
gateway.
For further information, documentation etc., please visit the SSTCOMM website: http://www.sstcomm.com.
1.2 Important User Information
The data and examples in this manual cannot be copied without authorization. SSTCOMM maybe upgrades
the product without notifying users.
is the registered trade mark of SSTCOMM Automation.
The product has many applications. The users must make sure that all operations and results are in
accordance with the safety of relevant field, and the safety includes laws, rules, codes and standards.
1.3 Terms
DeviceNet: DeviceNet protocol
RS-485/RS-232: Hardware specifications of serial interface
Modbus: MODICOM Modbus Protocol PI-MBUS-300 Rev.J

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2 Product Overview
2.1 Product Function
The gateway can connect multiple devices with Modbus (RS-485/RS-232) interface to DeviceNet network. It
acts as a master at the side of Modbus network, and a slave at the side of DeviceNet network. It supports RS-485
and RS-232 at the serial interface. Comparing with other products, GT200-DN-RS adds the debugging function,
which makes the application so convenient in industrial field. RS-485 interface is used for communication while
RS-232 interface is used to debug, and RS-232 interface is used for communication while RS-485 interface is
used to debug. RS-232 interface is the special interface of configuration mode.
GT200-DN-RS works through the data mapping between networks, mapping Modbus parameters to
DeviceNet I/O data.
2.2 Product Features
Acts as a DeviceNet slave: Group 2 Only Slave.
Support all the baudrate which accords with the DeviceNet protocol, and support sensing baud rate
automatically function.
Acts as a Modbus master, and support the 1, 2, 3, 4, 5, 6, 15, 16 function codes.
The range of input-voltage is 8~30V, and the standard working voltage is 24VDC.
Free configuration software SST-MD-CFG.
Support the debugging without PLC.
2.3 Technical Specification
[1] Communication rate:
DeviceNet interface supports: 125kbit/s, 250kbit/s, and 500kbit/s;
The default parameters of Modbus interface are 19200bps, 8 bits, no parity, 1 stop bit;
The Modbus baud rate: 300, 600, 1200, 2400, 9600, 19200, 38400, 57600, 115200bps;
[2] DeviceNet topology:

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Trunk lines
Thick cable and thin cable both can be used to build the trunk lines. When the thick cable and thin cable are
mixed to build the trunk lines, the longest cable length can be calculated through the following formulas:
Lthick+5*Lthin=500m 125kbit/s
Lthick+2.5*Lthin=250m 250kbit/s
Lthick+Lthin=100m 500kbit/s
Here Lthick is the length of thick cable, and Lthin is the length of thin cable.
Drop lines
The length of drop lines is the distance from tap of the trunk lines to the transceiver of every device, and it
should be less than 6m. The length of drop lines is related to baud rate, and the longest length with different baud
rate shows in Table1.
Table1-The length of drop lines
Baud Rate
Length of Cable
125kbit/s
156m
250kbit/s
78m
500kbit/s
39m
[3] Working mode: DeviceNet interface only support: Group 2 Only Slave;
[4] Working environment:
Relative Humidity: 5% to 95%(No condensing)
Temperature: -4℉~140℉(-20℃~ 60℃)
Pollution level: 3
[5] EMC testing standard compliant;
[6] Power: 24VDC (11V~30V), maximum 80mA (24V) ;
Within the module, it uses DC to DC conversion, and the conversion efficiency is not less than 70%;
[7] External dimension (W*H*D): 1.57 in*4.92 in*4.33 in (40mm*125mm*110mm).

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2.4 Attention
To prevent stress, prevent module panel damage;
To prevent bump, module may damage internal components;
Power supply voltage control in the prospectus, within the scope of the requirements to burn module;
To prevent water, water module will affect the normal work;
Please check the wiring, before any wrong or short circuit.
2.5 Related Products
There are other products: GT200-DP-RS, GT200-DP-DN and so on.
If you want to get more information about these products, please visit the SSTCOMM website:
http://www.sstcomm.com.

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3 Product Appearance
Note: This picture is only for reference, the product appearance should take the material object as a standard.
3.1 Indicators
The explanation of indicators show as Table 2, Table3 and Table4:
Table 2-Indicators of Module Status (MS)
Indicators
Description
Off
No power supply or broken indicators
Always Green
Work normally
Green blinking
Not correctly configured
Red blinking
Recoverable faults, Modbus communication faults (such as not find the
slave station)
Always Red
Unrecoverable faults
Indicators
LED
RS-232
Interface
DeviceNet
address
DeviceNet
interface
Setting switches of baud
rate and working modes
RS-485
Interface

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Red-Green blinking
Self-testing is ongoing
Table 3-Indicators of DeviceNet network Status (NS)
Indicators
Description
Off
The repetitive MAC ID detection is not successful or no power supply
Green blinking
The devices are online but there are not connections established
Always Green
The devices are online and there are connections established
Red blinking
One or more I/O connections have been timeout
Always Red
The device detects unrecoverable faults and cannot communicate, such as
there is repetitive DeviceNet address on net.
Table 4-Indicators of Serial interface Status (TX, RX)
Indicators
Status
Description
RX (Green)
Blinking
Serial port is receiving data
Off
Serial port is not receiving data
TX (Red)
Blinking
Serial port is sending data
Off
Serial port is not sending data
3.2 Status Setting Switches and LED
3.2.1 Status Setting Switches
Status setting switches have three functions:
1) Modify DeviceNet baud rate
2) Set working mode: Configuration and run mode are optional. At the status of configuration, the LED shows
“CF”.
3) Set debugging: Debug and normal mode are optional. GT200-DN-RS has the function of debugging, and it
provides users with easy way for debugging Modbus network data communications. At the status of debugging,
the LED shows “db”.
Note: The priority of configuration mode is higher than debugging. When configuring the gateway, the debug

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switch should be dialed to normal. When debugging the gateway, mode switch should be dialed to run.
Status setting switches are below the product:
4 3
2
1
Baud rate
Mode
Debug
1
00:125K
01:250K
Configuration
Debug
0
10:500K
11: Automatic
Run
Normal
Note: If you reset the status switches, you should restart GT200-DN-RS (power off and power on) to make the
settings take effect.
3.2.2 Setting Switches of DeviceNet Address
0
2
×10
×1
A
B
According to the above, the DeviceNet address is calculated as follow:
DeviceNet address = (A × 10) + (B × 1)
3.2.3 LED
The main contents of LED include: current baud rate (only show at startup), current DeviceNet address (show
at running)

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3.3 Communication Interface
3.3.1 Modbus Interface
Modbus interface use open 3 pin pluggable terminal, users could accord to the panel instruction to wire:
Pin
Function
1
B-, RS-485
2
GND
3
A+, RS-485
RS-485 interface
Pin
Function
1
RX, connect to RX of user’s device RS-232
2
TX, connect to TX of user’s device RS-232
3
GND, connect to GND of user’s device RS-232
RS-232 interface

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3.3.2 DeviceNet Interface
5-pin connector:
+24V
-24V
CAN-
Shielding
CAN+
1
5
Open 5-pin connector at the side of DeviceNet:
Pin
Wiring
1
GND(24V)
2
CAN-
3
shielding
4
CAN+
5
+24V

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4 Use Method
4.1 Quick Start Guide
1. Setting DeviceNet address manually
Before connecting DeviceNet master, sets DeviceNet address by moving code switch at the gateway’s side.
The range of DeviceNet effective address is 0 to 63. The calculation method of DeviceNet address is shown at
chapter 3.2.2 of the document. To supply power to this module, the LED displays blinking “bT”, and then shows
"12" or "25" or "50", respectively indicates "125K", "250K", "500K".Finally, it shows the DeviceNet address you
have set. When baud rate is set to automatically baudrate sensing state, if there is no other CAN node on the
network to send data, it shows “bT”.
Note: When using DIP switch to modify the DeviceNet address, restart the gateway to take the new address effect.
2. In the configuration mode, set DeviceNet address, Modbus parameters and commands through gateway
configuration software SST-MD-CFG.
The method of entering configuration mode is: Dial the mode setting switch to “1”, and power on the module,
the module can enter the configuration mode. Then connect with SST-MD-CFG for configuration. After
configuration, restart the gateway to run normally.
Note: RS-232 interface is specialized configuration interface, in configuration mode, please pay attention to the
wiring exactly.
3. Setting DeviceNet baud rate manually
Set DeviceNet baud rate manually though the baud rate setting switches below the gateway, baud rate setting
switches have four combinations, respectively indicate 125K, 250K, 500K, automatically sensing baud rate. See
chapter 3.2.1 of the document.
4. Connect Modbus interface and DeviceNet interface accurately and checkup the wiring.
5. Power on, the module enter the run mode. Before powering on, you should dial the mode setting switch to
running status, debugging setting switch to normal.

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4.2 Hardware Wiring
1. In accordance with the third chapter about DeviceNet interface instructions, wire every pin of 5-pin terminal
exactly, no power on at this time.
2. In accordance with the third chapter about Modbus interface, properly wiring.
3. Checkup all wiring.
4. Power on the module, the module enter run mode. Pay attention to settings of mode switch and debug switch.
4.3 Software Configuration
Users connect GT200-DN-RS gateway to PC. Set gateway’s Modbus parameters, commands, and DeviceNet
parameters through gateway configuration software-SST-MD-CFG. Before powering on the gateway, you should
dial the mode setting switch to “1”, make the gateway be at the status of configuration.
See SST-MD-CFG Software configuration instruction.
4.4 Run
4.4.1 Data Exchange Mode
The data exchange between GT200-DN-RS Modbus and DeviceNet is established by “mapping”.
GT200-DN-RS has two data buffers, one is DeviceNet network input buffer, and the other is DeviceNet network
output buffer. Modbus read commands read the data and then write the data into input buffer for DeviceNet
network reading. Modbus write commands get data from network output buffer, and then output the data to
Modbus devices by writing commands.

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Modbus
device 3
Modbus
device 4
Modbus
device 5
Modbus
device 6
Input buffer
Output buffer
Users can configure 48 commands at most, and can use a Modbus command to read a serial Modbus
registers.
Note 1: If there is something wrong with Modbus communication, DeviceNet I/O data cannot be
effectively collected, and the data got through I/O scanning is zero.
Note 2: When DeviceNet interface of GT200-DN-RS receives network output-data, Modbus interface
will send writing-commands. That is to say that after DeviceNet master station sending data, Modbus
interface of GT200-DN-RS will send writing-commands, and transmit data to Modbus slave devices. If
AB’s PLC is in programming mode, there will be no the network output-data.
Note 3: During the configuration of GT200-DN-RS, when polling mode of output commands is set to
“Change of State”, the function of the local data exchange cannot be used.
Local data exchange: Configure writing-commands to input-area (0000~3FF0)
4.4.2 Terminal Resistor
DeviceNet network requires a 120ohm terminal resistor respectively at the two farthest terminals of the
network. Modbus requires terminal resistors too. GT200-DN-RS has a terminal resistor at the side of Modbus
interface; users only need add a 120ohm terminal resistor at the other side of the Modbus network.

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5 Software Instructions
5.1 Notes before Configuration
SST-MD-CFG is software which bases on Windows platform, and used to configure the gateway
GT200-DN-RS.. Users could set Modbus and fieldbus parameters and commands.
This document introduces the using method of GT200-DN-RS.
After installed, double-click on the icon and enter into Configuration interface.
5.2 User Interface
The interface of SST-MD-CFG includes: Title bar, Menu bar, Toolbar, Status bar, Device plate,
Configuration plate and Comment plate.
Remark: In this software, all the gray parts can’t be modified.

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Toolbar:
Toolbar is shown as below:
The function of Toolbar: New, Open, Save, Add Node, Delete Node, Add Command, Delete Command,
Upload, Download, Conflict Detection, Auto Mapping, Export EXCEL and Monitor I/O Data..
New: Create a new configuration project
Open: Open a configuration project
Save: Save current configuration
Add node: Add a node for Modbus master
Delete node: Delete a node for Modbus master
Add command: Add a Modbus command
Delete command: Delete a Modbus 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
Conflict Detection: To check whether there are some conflicts with configured commands in the gateway
memory data buffer
Auto Mapping: Used to automatically calculate the mapped memory address without conflict by each
command
Export EXCEL: Export current configuration to the local hard disk, saved as .xls file
Monitor I/O Data: Monitor the gateway memory buffer data
5.3 Device View Operation
5.3.1 Device View Interface
5.3.2 Operation Mode
The device view supports three types of operation: Edit Menu, Edit Toolbar and Right-click edit Menu.

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5.3.3 Operation Types
1) Add node operation: Right-click on subnet or existed nodes, and then you can add a new node named
"new node" under subnet.
2) Delete node operation: Right-click on the node to be deleted, and then you can delete the node. The node
and its all commands will be deleted.
3) Add command operation: Right-click on the node, and then you can add a command for the node. The
commands dialog box is shown as follow:
Currently, GT200-DN-RS supports the commands: 01, 02, 03, 04, 05, 06, 15 and 16 commands
Select the command: Double click on the command

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4) Delete command operation: Right-click on the command and then you can delete command.
5) Rename nodes: Left-click on the node to be renamed, and then the edit status will be shown and you can
rename it.
5.4 Configuration View Operation
5.4.1 Interface of Fieldbus Configuration
In the device view, click on “fieldbus”, the configuration view is shown as follows:
Configurable items include: size of DeviceNet input buffer, size of DeviceNet output buffer and DeviceNet
address.
Size of DeviceNet input buffer: There are 8, 16, 32, 64, 96, 128 and 160 to be selected.
Size of DeviceNet output buffer: There are 8, 16, 32, 64, 96 and 112 to be selected.
Note: The sum of input buffer and output buffer must be less than 240. (Expect 240). If the size of input
buffer is 160, the size of output buffer is at most 64. If the size of output buffer is 112, the size of input buffer is at
most 96, or the configuration didn't work.