SST Automation GT200-PN-3RS User manual

Universal Serial / PROFINET IO Gateway
GT200-PN-3RS
User Manual
V 1.5
Rev A
SST Automation
E-mail: [e-mail]
WWW.SSTCOMM.COM

User Manual
Universal Serial/PROFINET IO Gateway
GT200-PN-3RS
WWW.SSTCOMM.COM
Important Information
Warning
The data and examples in this manual cannot be copied without authorization. SSTCOMM reserves the right to
upgrade the product without notifying users.
The product has many applications. The users must make sure that all operations and results are in accordance with
the safety of relevant fields, and the safety includes laws, rules, codes and standards.
Copyright
Copyright © 2022 by SST Automation. All rights reserved.
Trademark
is the registered trade mark of SST Automation.
Technical Support Contact Information
www.sstcomm.com
E-mail: sup[email protected]om

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Universal Serial/PROFINET IO Gateway
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Catalog
1 Product Overview.............................................................................................................................................................1
1.1 Product Function................................................................................................................................................... 1
1.2 Product Features....................................................................................................................................................1
1.3 Technical Specification......................................................................................................................................... 1
1.4 Related Products....................................................................................................................................................2
1.5 Revision History....................................................................................................................................................2
2 Hardware Descriptions.....................................................................................................................................................3
2.1 Product Appearance...............................................................................................................................................3
2.2 Indicators............................................................................................................................................................... 4
2.3 Interface.................................................................................................................................................................4
2.3.1 Power Interface.......................................................................................................................................... 4
2.3.2 Serial Ⅰ/Ⅱ................................................................................................................................................ 5
2.3.3 Serial Ⅲ......................................................................................................................................................5
2.3.4 Ethernet Interface....................................................................................................................................... 6
2.4 DIP Switch.............................................................................................................................................................6
3 Installation........................................................................................................................................................................ 7
3.1 Machine Dimension.............................................................................................................................................. 7
3.2 Installation Method............................................................................................................................................... 8
4 Quick Start Guide.............................................................................................................................................................9
5 Software Instructions........................................................................................................................................................9
5.1 Software Interface Description........................................................................................................................... 10
5.2 Device View........................................................................................................................................................ 11
5.2.1 Ethernet Configuration View................................................................................................................... 11
5.2.2 Subnet Configuration View-Modbus Master...........................................................................................13
5.2.3 Subnet Configuration View-Modbus Slave............................................................................................. 16
5.2.4 Subnet Configuration View-Custom Protocol......................................................................................... 17
5.2.5 Subnet Configuration View-User Config................................................................................................ 18
5.3 Tool......................................................................................................................................................................19
5.3.1 Upload Config and Download Config.....................................................................................................20
5.3.2 Conflict Detection.................................................................................................................................... 21
5.3.3 Export EXCEL......................................................................................................................................... 23
5.3.4 Debug....................................................................................................................................................... 23
5.3.5 Automap................................................................................................................................................... 25
5.3.6 Assign Ethernet Parameters..................................................................................................................... 25
5.3.7 View Device Information.........................................................................................................................29
6 Work Principle................................................................................................................................................................30
6.1 Data Exchange.....................................................................................................................................................30
6.2 Custom Protocol..................................................................................................................................................31
6.3 User Config......................................................................................................................................................... 33

User Manual
Universal Serial/PROFINET IO Gateway
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1 Product Overview
1.1 Product Function
GT200-PN-3RS is a gateway which can provide a seamless connection between PROFINET network and Modbus.
The product has three serial interfaces. And it supports 3 kinds of serial port types: RS232/RS485/RS422.
1.2 Product Features
Wide application: Any devices with RS232/RS485/RS422 interface can use this gateway to realize exchanging
data. For example, Such as frequency converters with Modbus protocol interface, motor startup protection
devices, intelligent high and low voltage electrical appliances, power measuring devices, transmitters, intelligent
field measuring equipment and instruments etc.
Easy configuration: Users don’t need to know the technical details of Modbus. Users only need to refer to this
manual and use the gateway configuration software SST-TS-CFG to easily complete the configuration of
gateway according to requirements. No complicated programming is required, and connection and
communication can be realized in a short time.
1.3 Technical Specification
[1] At PROFINET side GT200-PN-3RS is PROFINET slave and acts as Modbus master or Modbus slave at serial
side.
[2] Supports standard PROFINET I/O protocol.
[3] PROFINET: Supports up to 32 slots, input/output data buffer is up to 384 bytes (the length uses can use is limited
to specific PLC and PDU size of communication module), the length of input/output bytes can be set by
configuration software of PROFINET Master such as STEP7 or TIA Portal.
[4] With 3 serial ports, supports RS232 or RS485 electrical interface, serial Ⅲcan also support RS422.
[5] The protocol type’s serial ports support: Modbus Master, Modbus Slave, Custom Protocol, User Config.
[6] Serial port parameters:
Operation mode: Half-duplex.
Baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200 bps optional.
Data bits: 7, 8 optional.
Parity: None, Odd, Even, Mark and space optional.

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Stop bits: 1,2 optional.
[7] Modbus master:
Function code: 01H, 02H, 03H, 04H, 05H, 06H, 0FH and 10H.
Format: RTU and ASCII.
Function: Cycle output, forbidden output and change of value output of write command.
Each master can configure up to 48 Modbus commands.
[8] Modbus slave:
Function code: 03H, 04H, 06H and 10H.
Format: RTU and ASCII
[9] Power supply: 24VDC (11~30VDC).
[10] Operating temperature: -4℉~140℉(-20℃~60℃). Humidity: 5%~ 95% (non-condensing).
[11] Built-in electrostatic protection: 15 KV ESD. Communication interface isolation: 3KV.
[12] Dimensions (W*H*D): 1.6 in * 5.0 in * 4.4 in (40mm * 125mm * 110mm).
[13] Installation: 1.4 in (35 mm) DIN RAIL.
[14] Protection level: IP20.
1.4 Related Products
The related products include: GT200-DN-RS, GT200-DP-RS.
To get more information about related products, please visit SSTCOMM website: www.sstcomm.com.
1.5 Revision History
Revision
Date
Chapter
Description
V1.5, Rev A
01/05/2022
ALL
Update the format and update software
screenshots, etc.

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2 Hardware Descriptions
2.1 Product Appearance
Note: This picture is for reference only. The product appearance is subject to the actual product.
SerialⅠIndicator
SerialⅢIndicator
SerialⅡIndicator
Network Indicator
Module Indicator
Dual PROFINET Ports
SubnetⅠ
Subnet Ⅲ
24VDC Interface
DIP Switch
SubnetⅡ

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2.2 Indicators
Indicators
State
Description
SerialⅠTX
Green blinking
Serial port sending data.
OFF
No data is sent.
SerialⅠRX
Green blinking
Serial port receiving data.
OFF
No data is received.
Serial Ⅱ/Ⅲ
Green blinking/OFF
Serial port data/No data is received.
Red blinking/OFF
Serial port data/No data is sent.
MS
See below table
NS
See below table
Module indicator and network indicator:
Module indicator state
MS
Network indicator state
NS
Description
OFF
Red blinking
Start-up state, waiting to initialize
Green on
Red blinking
Initialization complete, but no connection
yet with PLC
Green on
Green on
PLC has connected
Other
Other
Undefined state
2.3 Interface
2.3.1 Power Interface
Pin
Function
1
Power GND
2
NC, Not connected
3
24V+, DC Positive 24V
GND
NC
24V+

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2.3.2 Serial Ⅰ/Ⅱ
Pin
Function
1
D+/TX, RS485 Data Positive/RS232 data sending,
connect RX of user device
2
D-/RX, RS485 Data Negative/RS232 data receiving,
connect TX of user device
3
GND
2.3.3 Serial Ⅲ
Pin
Function
1
D+, RS485 Data Positive/RS422 Transmit
Positive/RS232 Sending, connect RX of user device
2
D-, RS485 Data Negative/RS422 Transmit
Negative/RS232 Receiving, connect TX of user device
3
GND
4
R+, RS422 Receive Positive
5
R-, RS422 Receive Negative
The basic characteristics of RS485 transmission technology:
Network topology: Linear bus, there are active bus terminal resistors at both sides. If the communication quality
is unstable, it can be considered to add terminal resistor (120Ω, 1/2W) at both ends.
Media: Shielded twisted-pair cable and also can cancel the shielding, depending on environmental conditions
(EMC).
Station number: 32 stations per subsection (without repeater), and can increase up to 127 stations (with repeater).
D+/TX
D-/RX
GND

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2.3.4 Ethernet Interface
Ethernet interface uses RJ-45 plug-in. Its pin (standard Ethernet signal) is defined as below:
Pin
Signal Description
S1
TXD+, Transmit Data+
S2
TXD-, Transmit Data-
S3
RXD+, Receive Data+
S4
Bi-directional Data+
S5
Bi-directional Data-
S6
RXD-, Receive Data-
S7
Bi-directional Data+
S8
Bi-directional Data-
2.4 DIP Switch
The function of the DIP Switch is to restore the gateway to the default configuration.
What circumstances does the gateway need to perform this operation ?
For example: Under the current configuration, the PROFINET configuration of GT200-PN-3RS does not support
certain combinations. Sometimes gateway will appear the phenomenon of configuration failure.
At this time, the indicators of the gateway will display: Network indicator NS-OFF, Module indicator MS-Red
blinking (the same state as gateway Start-up). And you cannot search GT200-PN-3RS through the configuration
software SST-TS-CFG.
The specific steps to restore the default configuration are as follows:
1) Power off GT200-PN-3RS.
2) Set DIP switch: bit 1-ON and bit 2-OFF.
3) Power on GT200-PN-3RS, waiting TX LED of SerialⅠbe green on.
4) Set bit 1 of DIP switch to OFF in 5s, waiting TX LED be green off.
5) Set bit 1 of DIP switch to ON in 5s, waiting TX LED be green on.
6) Restart GT200-PN-3RS (power off and power on), GT200-PN-3RS has been restored to the default configuration.
At this time, the gateway is in the 192.168.0.X network segment.

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3 Installation
3.1 Machine Dimension
Size (width * height * depth):
1.6 in * 5.0 in 4.4 in (40 mm * 125 mm * 110 mm)

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3.2 Installation Method
Using 1.4 in (35mm) DIN RAIL.
Install the gateway
Uninstall the gateway
1. Use a screwdriver to pass through the DIN RAIL bar, pull down and hold.
2. Pull out the gateway.
3. Lift up the gateway.

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4 Quick Start Guide
Basic steps when configuring GT200-PN-3RS :
1. Wiring：See also Chapter2.3 Interface.
(1) Connect the network port of the gateway to the PC with a network cable for downloading the configuration.
Another network port can be connected to PROFINET master equipment such as PLC for data communication.
(2) Connect the serial port of the gateway to the serial device for communication with the serial port device.
(3) Connect the gateway power supply and power on.
2. Download SST-TS-CFG software from www.sstcomm.com/Download1/ and install it.
3. Download the latest device description file for GT200-PN-3RS from www.sstcomm.com/Download1/.
4. Build your configuration using SST-TS-CFG and download it to the gateway. For more details,see Chapter 5.
When the download is completed, it will give hints “whether to restart the gateway”, click “Yes”.
5. Install the appropriate device description file in the PROFINET configuration tool.
6. Configure the PROFINET network as required. Make sure that the configuration matches the configuration present
in the GT200-PN-3RS.
When GT200-PN-3RS establishes a connection with the PROFINET master, the gateway will display: NS green on,
MS green on.
Please note the following three points:
The gateway configuration in SST-TS-CFG must be consistent with the settings of configuration software of
PROFINET Master station.
1) Device IP Address. Also see Chapter5.3.6.
2) Device Name. Also see Chapter5.3.6.
3) The type and order of the “PROFINET Configuration Module”. Also see Chapter5.2.1.

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5 Software Instructions
5.1 Software Interface Description
SST-TS-CFG is the configuration software based on Windows, and used to configure GT200-PN-3RS through
network Interface. Double click software icon ,select GT200-PN-3RS, enter the main interface of software.
Remark: In the software, all grey parts cannot be modified.
Tool bar interface is shown as below:
The function from left to right is: New, Open, Save, Add Node, Delete Node, Add Command, Delete Command,
Upload, Download, AutoMap, Conflict Detection, Export XLS, Debug and Assign Ethernet Parameters.
New: Create a new configuration project.
Open: Open the configuration project.
Save: Save the configuration project.
Add Node: Add a Modbus slave node.
Network Settings interface:
Contains Fieldbus and the
connection object
Menu Bar
Tool Bar
Title Bar
Parameter Settings interface:
Contains modifiable part (white)
and un-modifiable part (grey)
Comment field: Explain the
function of the configuration
options

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Delete Node: Delete a Modbus slave node.
Add Command: Add a Modbus command.
Delete Command: Delete a Modbus command.
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 command.
Conflict Detection: To check whether there are conflicts with configured commands in the gateway memory
data buffer.
Export EXCEL: Export current configuration to the local hard disk, saved as .xls file.
Debug: Monitor or modify the gateway memory buffer data.
Assign Ethernet Parameters: Used to assign the IP, subnet and gateway information on the LAN.
5.2 Device View
Ethernet is used to configure PROFINET network parameters. Subnet is used to configure serial port parameters. The
operations of Subnet 1,Subnet 2 and Subnet 3 are the same.
5.2.1 Ethernet Configuration View
The Ethernet configuration interface is shown as below:
In the above parameters, the detailed information is shown as below:
IP Address: IP address of GT200-PN-3RS.

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Subnet Mask: Subnet mask of GT200-PN-3RS.
Gateway Address: Gateway address GT200-PN-3RS is located in LAN.
Number of Input Bytes: The length of input data needs to be exchanged between GT200-PN-3RS and PLC. It
depends on the PROFINET configuration dialog box.
Number of Output Bytes: The length of output data needs to be exchanged between GT200-PN-3RS and PLC. It
depends on the PROFINET configuration dialog box.
PROFINET Config: Input/output bytes length of GT200-PN-3RS.
Notes: This configuration items must be the same as that of relevant slots in configuration software of PROFINET
Master station.
PROFINET configuration dialog box is shown as below:
As is shown above, there are 4 slots configured, that is: 128byte input + output, 128byte input + output, 128byte input
+ output, 2byte input + output.
The type and order of these modules must be the same as the settings of configuration software of PROFINET Master
station.

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5.2.2 Subnet Configuration View-Modbus Master
1. Modbus Master configuration view
The “Modbus Master” configuration interface of “Protocols Select” is shown as below:
Baud Rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and115200bps optional.
Data Bits: 7, 8.
Parity Check: None, Odd, Even, Mark and Space optional.
Stop Bits: 1, 2.
Transmission Mode: RTU, ASCII.
Response Timeout: After the Modbus Master sends request, it waits the Modbus slave's response time. range: 300 ~
60000ms.
Delay between Polls: Delay between a response has been received and sending next request, the range is 0~ 2500ms.
Output Mode:
Modbus write command, there are three modes: cycle, forbidden, change of value.
Cycle: Same as Modbus read command output way, start scan output according to scan rate.
Forbidden: Disable output of Modbus write command.
Change of Value: When the output data change, the write command will be sent and stop to output when
receiving the right response.
Scan Rate: Scan Rate is the ratio of fast scan cycle to slow scan cycle. If this parameter value is set to 10 then every
fast scan command will be sent 10 times and those slow scan commands will be sent once.
IO Channel Status Word:

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In Modbus Master and User Config mode (Poll mode of Output mode only), each command has one-bit data to
indicate the execution status.The bit is 1 when the command status is normal, otherwise is 0. The length of the status
word is 2 bytes.
In Modbus Slave and Customer Protocol mode, the 2-byte word is used to indicate the number of times the frame has
been correctly received.
Enable Auto Demotion: Default value is Disable. When Enable Auto Demotion and a command is a fast scan
command without correct response for N times, then the command will demote a slow scan command. This parameter
is valid for Modbus Reading command and cycle Writing command.
Auto Demotion: If a fast-scan command get incorrect response for N times, this command will be demoted to a
slow-scan command. The range of the parameter value is 1 to 255. The default value is 3.
Auto Demotion Time: The amount of time a demoted command stays in slow-scan state.
It will automatically return to the state at the end of the time. If it receives the correct response when demoted, it will
immediately returns to the fast-scan state. The range is 100 to 3600000ms. The default value is 10000ms.
2. Node Configuration
Under the “Modbus Master” mode, left click on a node and then the configuration interface is shown as below:
Parameter Description:
When the subnet protocols Mode is selected as “Modbus Master”, the node is the Modbus slave station address,
ranging from 0 ~ 247.
Instructions: For device view, the software supports three kinds of operation modes: Edit Menu, Edit Toolbar,
and Right-click edit Menu.
(1) Add node: Left click on subnet or existing nodes, and then perform the operation of adding a new node. Then
there is a new node named “Node-X” under subnet.

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(2) Delete node: Left click on the node to be deleted, and then perform the operation of deleting node. The node and
all commands will be deleted.
(3) Copy node: Left click on the existing node, choose the node and execute the operation of copying nodes (include
all commands under the node).
(4) Paste node: Select the Subnet or an existing node and paste the node. The pasted node has the same parameters
with the copied node.
3. Command Configuration
Parameter Description: Commands No. supported: 01, 02, 03, 04, 05, 06, 15, 16.
Instructions: The Command Configuration view supports three types of operation: Edit Menu, Edit Toolbar and
Right click edit Menu.
(1) Add commands: Left click on the node, and then perform the operation of adding command to add a
command for the node.
(2) Delete commands: Left-click on the command and perform the operation of deleting command.
Under the “Modbus Master” mode, left click on a command and then the configuration interface is shown as below:
Modbus Register Starting Address: Modbus salve register or coils starting address. The range of the parameter
value is 0 to 65535.
Numbers of Data: The number of data.
Modbus function code 3, 4, 16: 1~127.
Modbus function code 1, 2, 15: 1~2000.
Memory Mapped Starting Address (HEX): The address range of data mapping in the module memory:
Read command (1, 2, 3, 4): 0x0000~0x03FF.
Write command (5, 6, 15, 16): 0x4000~0x43FF.
Users can also use this area when write command is used as local data exchange: 0x0000~0x03FF.
Memory Mapped Bit Offset (0~7): For the bit operation command, the position where the start bit is located in,

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range: 0~7.
Byte Swap: There are four mode of Byte Swap: No swap, Double-byte swap, Four-byte swap and Four-Byte
Big-endian and Little-endian Swap.
Double-byte swap: The high and low bytes of 2 bytes (one register) are exchanged,e.g., 0x1234 to 0x3412.
Four-byte swap: The first two bytes are exchanged with the last two bytes,e.g., 0x12345678 to 0x56781234.
Four-byte Big-endian and Little-endian Swap: e.g., 0x12345678 to 0x78563412.
Scan Mode: There are two ways, fast and slow scan. Every Modbus command can be set to fast scan or slow scan.
The gateway will send Modbus command according to the “Scan Rate”. Scan Rate is ratio of fast scan to slow scan
(configured in the subnet configuration interface).
Fast Output: This option is valid only in Change of Valuet - write command mode.
Response Timeout Processing: It’s the processing mode when the gateway doesn’t receive the response within
response wait time (set in “Response Timeout” of the subnet).
Clear: Sets the response data in the input buffer to zero.
Hold: The data in the input buffer remains the same.
5.2.3 Subnet Configuration View-Modbus Slave
The “Modbus Slave” configuration interface of “Protocols Select” is shown as below:
Baud Rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200bps optional.
Data Bits: 7, 8.
Parity Check: None, Odd, Even, Mark and Space optional.
Stop Bits: 1, 2.
Slav Address: 0~247.

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Transmission Mode: RTU, ASCII.
IO Channel Status Word:
In Modbus Master and User Config mode (Poll mode of Output mode only), each command has one-bit data to
indicate the execution status.The bit is 1 when the command status is normal, otherwise is 0. The length of the status
word is 2 bytes.
In Modbus Slave and Customer Protocol mode, the 2-byte word is used to indicate the number of times the frame has
been correctly received.
Byte Swap: There are four mode of Byte Swap: No swap, Double-byte swap, Four-byte swap and Four-Byte
Big-endian and Little-endian Swap.
Double-byte swap: The high and low bytes of 2 bytes (one register) are exchanged,e.g., 0x1234 to 0x3412.
Four-byte swap: The first two bytes are exchanged with the last two bytes,e.g., 0x12345678 to 0x56781234.
Four-byte Big-endian and Little-endian Swap: e.g., 0x12345678 to 0x78563412.
5.2.4 Subnet Configuration View-Custom Protocol
The “Custom Protocol” configuration interface of “Protocols Select ” is shown as below:
Baud Rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200bps optional.
Data Bits: 8.
Parity: None, Odd, Even, Mark and Space optional.
Stop Bits: 1,2.
IO Channel Status Word: