Data Sheet

Modbus Ethernet Gateways (G01 - G03 & G14 - G16)

Modbus gateways allow data transmission between LAN hosts and serial devices by converting Modbus protocols (Modbus TCP and Modbus RTU/ASCII). They are intended to be used in industrial networks especially in the field of Industry 4.0 but not only. Apart from extending the capabilities of industrial devices, they can be also adapted up to user’s requirements and needs.

Transmission is carried out by two modes: Gateway and Router. In the Gateway mode the port is used to communicate with Slave devices, but in the Router mode with Master devices. It is also possible to set up different modes on every port. Block diagrams below describe how each of these modes works.

Features

2-mode Ethernet Modbus Gateway
Ethernet converter to RS232/RS485
ESD protection for the RS485 data line
Power supply: +12 to +30 VDC
Transmission speed up to 115200 bps
Tx, Rx and power LED indicators
RS485 embedded termination 120 ohm
Operating temperatures: -40°C to +75°C
DIN rail mounting
Dimensions: 90x56.4x22.5 mm
3 years warranty
Customization of OEM is welcomed

Introduction

Devices are based on G01 - G03 gateways (ESP32 Xtensa LX6 microcontroller) and G14 - G16 gateways (STM32F4 microcontroller) depending on needed ports and interfaces.

Dedicated EMC integrated circuits guarantee improved connection quality by limiting the impact of interference typical for an industrial environment.

Specification

Redisage PN		G01	G02	G03	G14	G15	G16
Ports	RS232	2x	-	-	4x	2x	-
	RS485	-	1x	-	-	2x	4x
	RS232/RS485	-	-	2x	-	-	-
Microcontroller		ESP32			STM32F4
WiFi		N/A
Power	Voltage	12-30 VDC
Power	Power	< 1 W
Frame ground connection		yes
Baud rate		up to 115200 bps
LED indicators		communication Tx, Rx and power
RS485 termination		120 ohm manually enabled
Connector	RS232/RS485	8-pin terminal block max. 2.5 mm² wire
	Power	3-pin terminal block max. 2.5 mm² wire
	Ethernet	RJ45
Transmission distance	RS485	max. 1,200 m at 9.6 kbps; max. 400 m at 115.2 kbps (Belden 9841 2P twisted-pair cable, if diﬀerent cables are used, the transmission distance may change)
Transmission distance	RS232	max. 15 m at 115.2 kbps
Mounting and enclosure		DIN rail, plastic PA - UL 94 V0, black/green
Temperatures		-40°C to +75°C operating and storage
Humidity		10 - 90% RH, non-condensing
ESD protection		±4 kV contact discharge / ±8 kV air discharge
Certification		CE, RoHS

Variants

G01 - Ethernet Modbus Gateway 2 x RS232

G02 - Ethernet Modbus Gateway 1 x RS485

G03 - Ethernet Modbus Gateway 2 x RS232/RS485

In the G03 gateway user should use only RS232 or only RS485 interface of one port as they occupy the same internal bus of the device.

G14 - Ethernet Modbus Gateway 4 x RS232

G15 - Ethernet Modbus Gateway 2 x RS232 & 2 x RS485

G16 - Ethernet Modbus Gateway 4 x RS485

Frame ground FG

Electronic circuits are constantly prone to electrostatic discharge ESD. Redisage Electronics modules feature a design for the frame ground terminal block FG. The frame ground provides a path for bypassing ESD, which provides enhanced static protection ESD abilities and ensures the module is more reliable. Connecting FG terminal block to the earth ground will bypass the ESD disturbances outside the device so will provide a better level of protection against ESD.

Frame Ground FG connection reference drawing is provided below.

If earth ground is not available FG can be left floating or it can be connected with the power supply GND.

Pin assignments

G01

G02

G03

G14

G15

G16

Enclosure dimensions

2U Module Enclosure
98 x 22.5 x 56.4
Units: mm

Getting started

Power supply

Ethernet Modbus gateways G01 - G03 and G14 - G16 have wide voltage power input (12 - 30 VDC). The power consumption is less than 1 W.

LED indicators

Ethernet Modbus gateways G01 - G03 have 3 LED indicators:

PW LED Blue - Power
ETH LED Green - Network activity
ST LED Orange - USB-UART Serial console mode

Ethernet Modbus gateways G14 - G16 have 5 LED indicators:

PW LED Blue - Power
ER LED Yellow - Error
ETH LED Green - Network activity
COM LED Green - RS232/RS485 activity
CN LED Yellow - Console mode
SR LED Red - Service mode

Configuration by the Web Page

Default configuration of the Ethernet Modbus gateways:

IP address: 192.168.100.100
Subnet mask: 255.255.255.0
Gateway: 192.168.100.1
DNS 1: 192.168.100.1
DNS 2: 8.8.8.8

User name: admin
Password: admin123

To access the web page open the web browser, type the IP address in the address bar and log in using the default user name and password. The device and a PC must be connected to the same Local Area Network.

After successful login, the “Status” page will show the current status of the ports.

To change the user name and password click on the user icon and select “Edit user”.

Ports configuration is available on the “Ports” page.

Item		Description
Internal Modbus Address		Internal Modbus Address is qualified by the Gateway/Router as a request for internal resources. The Internal Modbus Address has a higher priority than the Gateway Slave Address.
Idle Time [s]		Determine a time thread waits for the TCP connection. If time expired, the connection and thread are closed. Used only in Gateway Mode.
UART Mode	Gateway	Define the port's role in the system. In the Gateway Mode the port is used to communicate with Modbus Slave.
	Router	Define the port's role in the system. In the Router Mode the port is used to communicate with Modbus Master. Note the Routing Configuration section below if the Router Mode is chosen.
	Disabled	Disable the port.
UART Protocol		Determine a protocol used for a communication.
Gateway Slaves		Addresses of Modbus Slave Devices connected to Gateway UART ports. Multiple addresses can be written in one field, e.g. 9;11;14-17;80. This field is available only in the Gateway Mode. Use * to select all not assigned addresses.
Slaves Response Timeout [ms]		Specify how long the device will wait for response from Modbus Slave.
Baud Rate		Determine the port's transmission speed over the data channel.
Data Bits		Determine the number of data bits in the port's message frame.
Parity		Enable/disable the parity check in the port's message frame.
Stop Bits		Determine the number of stop bits in the port's message frame.
Termination		Enable/disable termination on RS line.
Routing Slaves		Addresses of Modbus Slaves connected to Modbus Router. Multiple addresses can be written in one field, e.g. 9;11;14-17;80. Use * to select all not assigned addresses.
Slaves Response Timeout [ms]		Specify how long the device will wait for response from Modbus Slave.
IP/Hostname		Determine IP address or Hostname of Modbus Slave.
TCP Port		Determine TCP port of Modbus Slave.

Changing the port’s service closes all sockets connected to the ports.

Network settings can be changed on the “Network” page.

Item	Description
Hostname	Label that is assigned to the device.
Configuration Method	Enable/disable the DHCP server. If the DHCP server is disabled, the IP address of the device has to be set manually.
IP Address	IP address of the device.
Netmask	Netmask associated with the IP address.
Gateway	Gateway address currently used by the device.
DNS Address	Domain Name System used by the device.
MAC Settings	Allow setting the default MAC address or typing it manually.
MAC Address	Allow changing the physical address of the device.
HTTP Port	Determine the port of the control panel.
Telnet Port	Allow connection with the device via Telnet.
Modbus TCP Listening Port	Used as an entry point for new Modbus TCP connections.

On the “Device” page there are tools used to a firmware update, a factory reset and a device reboot. There is also basic information about the device.

Item	Description
Firmware Update	Update firmware.
Factory Reset	Restore default ports settings and default network configuration.
Reboot	Reboot the device.
About	Basic information about the device.

Configuration by the Serial Console

The device has the ability to be reconfigured via a serial console. In case of the G01 - G03 Modbus gateways an additional USB/UART converter is needed.

Procedure to enter serial console mode on G01 - G03

Turn off the power of the device.
Connect Ethernet converter to the dedicated USB/UART converter via the microUSB port.
Connect the USB/UART converter to the PC.
Open the serial console (default baud rate is 115200 bps).
Press and hold the S1 button.
Turn on the power.
Wait until the ST indicator (orange LED) lights up (it should light up after red light - service mode).
Release the S1 button.
Login using user’s personal credentials or default login details.
If the process is successful, configuration command can be typed into the terminal.

Procedure to enter serial console mode on G14 - G16

Install STM32 Virtual COM Port Driver.
Turn off the power of the device.
Connect Ethernet converter directly to the PC (the dedicated USB/UART converter is not obligatory).
Open the serial console (default baud rate is 115200 bps).
Press and hold the S1 button.
Turn on the power.
Wait until the ST indicator (yellow LED) lights up.
Release the S1 button.
Login using user’s personal credentials or default login details.
If the process is successful, configuration command can be typed into the terminal.

Once this is done, log in using the default username and password, then change the network settings using "ipconfig" command.

List of all commands

Command	Description
help	Print the help.
conn	Print active TCP connections.
net_stat	Print lwIP statistics.
eth_mac	Print or change MAC address.
ipconfig	Print or change the network configuration.
http_port	Print or change default http port.
telnet_port	Print or change default telnet port.
modbus_tcp_port	Print or change modbus port.
ping	Check internet connection with the desired host.
restart	Restart the system.
user	Print or change user configuration.
sys_heap_usage	Print current heap usage.
modbus	Print or changes modbus settings.
modbus_ports	Print or changes modbus ports settings.
modbus_routing	Print or change modbus routing settings.
exit	Exit console.

Modbus ports configuration commands

modbus
- modbus help
  Print command help.
- modbus int_addr VALUE
  Set internal Modbus address.
  
  Example:
  modbus int_addr 5
- modbus idlet VALUE
  Show or set the idle TIME (in seconds) of the TCP connection after which the TCP connection is terminated by the converter and the TCP socket is released.
  
  Example:
  modbus idlet 720
  
  If a subcommand that normally sets a value is not given an argument, it will print the current value.
  
  Example:
  modbus idlet
  Set idle time is 5000
modbus_ports
- modbus_ports help
  Print command help, does not require com_number.
- modbus_ports PORT_NUMBER add_slaves [SLAVE_ADDR ;/- SLAVE_ADDR, *]
  Set all addresses of slaves connected to com_port. A star in value means fill rest free slaves. It means all slaves that are not set to other ports will be set to this one.
  
  Example:
  modbus_ports 1 addslaves 124
  
  Example:
  modbus_ports 1 addslaves 12-124
  
  Example:
  modbus_ports 1 addslaves 12;14;18
  
  Example:
  modbus_ports 1 addslaves 12;14-17;150-200
  
  Example:
  modbus_ports 1 addslaves 12;14-17;150-200, *
- modbus_ports PORT_NUMBER show_slaves
  Show addresses of slaves connected to com_port.
  
  Example:
  modbus_ports 1 showslaves
- modbus_ports PORT_NUMBER mode [ascii/rtu]
  Set Modbus port mode to ASCII or RTU.
  
  Example:
  modbus_ports 2 mode ascii
- modbus_ports PORT_NUMBER baud [RATE]
  Set the baud rate to RATE. For a list of acceptable baud rates, please refer to the manual.
  
  Example:
  modbus_ports 1 baud 9600
- modbus_ports PORT_NUMBER bits [CPS]
  Set bit count to C, parity to P, and stop bits to S. Valid values are:
  C: 7, 8 or 9
  P: N, E or O (N- none, E- even, O- odd)
  S: 1 or 2
  
  Example:
  modbus_ports 1 bits 8N1
  
  Example:
  modbus_ports 2 bits 7O1
- modbus_ports PORT_NUMBER state [GATEWAY/ROUTER/DISABLE]
  Enable or disable uart functionality.
  
  Example:
  modbus_ports 1 state GATEWAY
  
  Example:
  modbus_ports 2 state DISABLE
- modbus_ports PORT_NUMBER termination [on/off]
  Enable or disable termination on RS485 port.
  
  Example:
  modbus_ports 1 termination on
- modbus_ports PORT_NUMBER slave_response_timeout TIMEOUT
  Set response timeout (serial slave) in ms. When this timeout expires, delayed frames are dropped.
  
  Example:
  modbus_ports 1 slave_response_timeout 2000
  
  If a subcommand that normally sets a value is not given an argument, it will print the current value.
  
  Example:
  modbus_ports 2 baud
  Set baud rate is 115200

PORT_NUMBER is a number of ports in modbus gateway and it is counted from 0.

modbus_routing
- modbus_routing help
  Print routing's help.
- modbus_routing show
  Display all active routing table in system.
  [LP]: [SLAVES NUMBERS] [IP/HOSTNAME] [PORT] [TIMEOUT]
- modbus_routing add SLAVE_ADDR HOSTNAME PORT TIMEOUT
  SLAVE_ADDR with HOSTNAME PORT is used by uarts working in Modbus router mode. TIMEOUT (in ms) is used to close the connection if a slave is not responding. The maximum records is 8. One record for one address/ip.
  
  Example:
  modbus_routing add 18 192.168.0.10 502 2000
  
  Example:
  modbus_routing add 18;25 192.168.0.10 502 2000
  
  Example:
  modbus_routing add 18-25 192.168.0.10 502 2000
  
  Example:
  modbus_routing add 18-25;* 192.168.0.10 502 2000
  
  Example:
  modbus_routing add 18-25 modbus.local 502 2000
- modbus_routing remove [HOSTNAME_NUMBER/all]
  Remove Modbus Routing Table record. HOSTNAME_NUMBER is line number from /show/ command.
  
  Example:
  modbus_routing remove 2
  
  Example:
  modbus_routing remove all

Network settings

The following commands might be helpful to change network settings according to target LAN parameters,

ipconfig
- ipconfig addr ADDRESS
  Set IP address to ADDRESS.
  
  Example:
  ipconfig addr 192.168.0.10
- ipconfig mask NETMASK
  Set subnet mask to NETMASK (in dot-decimal format).
  
  Example:
  ipconfig mask 255.255.255.0
- ipconfig mask BIT_COUNT
  Set subnet mask to BIT_COUNT bits.
  
  Example:
  ipconfig mask 24
- ipconfig gateway GATEWAY_IP
  Set network gateway to GATEWAY_IP.
  
  Example:
  ipconfig gateway 192.168.0.1
- ipconfig dhcp [enable/disable]
  Enable or disable DHCP client.
  
  Example:
  ipconfig dhcp enable
- ipconfig dns1 ADDRESS
  Set primary DNS to ADDRESS, disable getting DNS from DHCP if enabled.
  
  Example:
  ipconfig dns1 192.168.100.1
- ipconfig dns2 ADDRESS
  Set secondary DNS to ADDRESS, disable getting DNS from DHCP if enabled.
  
  Example:
  ipconfig dns2 1.1.1.1
eth_mac
- eth_mac help
  Print the help message.
- eth_mac default
  Set device’s MAC address to factory-default one.
- eth_mac set MAC_ADDR
  Set device’s MAC address to MAC_ADDR. Accepts both dash and colon-separated formats.
  
  Example:
  eth_mac set 01-02-03-04-05-06
  
  Example:
  eth_mac set 01:02:03:04:05:06
http_port
- http_port help
  Print the help message.
- http_port PORT_NUMBER
  Set http port to PORT_NUMBER. A PORT_NUMBER value must be in range: 1-65535.
  
  Example:
  http_port 80
- http_port status
  Print current http port.
  
  Example:
  http_port status
  A current http port is 80
telnet_port
- telnet_port help
  Print the help message.
- telnet_port PORT_NUMBER
  Set Telnet port to PORT_NUMBER. A PORT_NUMBER value must be in range: 1-65535.
  
  Example:
  telnet_port 23
- telnet_port status
  Print current Telnet port.
  
  Example:
  telnet_port status
  A current telnet port is 23
modbus_tcp_port
- modbus_tcp_port help
  Print the help message.
- modbus_tcp_port PORT_NUMBER
  Set http port to PORT_NUMBER. A PORT_NUMBER value must be in range: 1-65535.
  
  Example:
  modbus_tcp_port 502
- modbus_tcp_port status
  Print current Modbus port.
  
  Example:
  modbus_tcp_port status
  A current modbus port is 502

Changing username or password

To change username or password, use user command. Available commands:

user help
Print the help message.
user mod_name USER_NAME NEW_NAME
Change the user name to NEW_NAME. It fails if the name is used by another user.

Example:
user mod_name admin NEW_NAME
user passwd USER_NAME
Change USER_NAME's password.

Example:
user passwd admin
****** <- here is entered password, but '*' appears instead

Note: Everyone can change the password for themselves.

Configuration by the Telnet Console

Access to the Telnet console can be obtained using a serial terminal program. Configure the connection type to Telnet, enter the IP address and Telnet port number (23 by default).

Console commands are the same as the ones described in the serial console section.

Reset to Factory Defaults

Reset to factory defaults is possible on the web page in the device section or using the service mode.

Service mode

Procedure to enter service mode for G01 - G03 gateways

Turn off the power of the device.
Connect Ethernet converter to the dedicated USB/UART converter via the microUSB port.
Connect the USB/UART converter to the PC.
Open the serial console (default baud rate is 115200 bps).
Press and hold the S1 button.
Turn on the power.
Wait until the ST indicator (red LED) lights up.
Release the S1 button.
If the process is successful, service commands can be typed into the terminal.

Procedure to enter service mode for G14 - G16 gateways

Install STM32 Virtual COM Port Driver (if it was not done before).
Turn off the power of the device.
Connect Ethernet converter directly to the PC (the dedicated USB/UART converter is not obligatory).
Open the serial console (default baud rate is 115200 bps).
Press and hold the S1 button.
Turn on the power.
Wait until the ST indicator (red LED) lights up.
Release the S1 button.
If the process is successful, service commands can be typed into the terminal.

List of commands in the service mode

Command	Description
help	Print the help.
credits	Print current credits value for this device.
dev_ident	Print the device identification value.
restart	Restart the system.
serial_num	Print the serial number of this device.
version	Display the bootloader version.
xmodem	Download image to the internal flash using xmodem.
defaults	Reset application variables to defaults.
ipconfig	Print or change the network configuration.
flash_read	Read bytes from flash memory.
md	Read bytes from memory address.

In the service mode, the “ipconfig” command can only show a last static IP address.

Additional notes

Related information and links
Ordering information	Accessories	Similar products

Products family sample photo

https://redisage.com

DISCLAMER NOTES
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

Datasheet-ID:

SR-D

Introduction

Hardware

Configuration by the Web Page

Configuration by the Telnet Console‎ ‎

Configuration by the Serial Console‎

Tables

Commands

Procedures

Introduction

Data Sheet

Modbus Ethernet Gateways (G01 - G03 & G14 - G16)

Introduction

Specification

Variants

G01 - Ethernet Modbus Gateway 2 x RS232

G02 - Ethernet Modbus Gateway 1 x RS485

G03 - Ethernet Modbus Gateway 2 x RS232/RS485

G14 - Ethernet Modbus Gateway 4 x RS232

G15 - Ethernet Modbus Gateway 2 x RS232 & 2 x RS485

G16 - Ethernet Modbus Gateway 4 x RS485

Frame ground FG

Pin assignments

Enclosure dimensions

Getting started

Power supply

LED indicators

Configuration by the Web Page

Configuration by the Serial Console

Procedure to enter serial console mode on G01 - G03

Procedure to enter serial console mode on G14 - G16

List of all commands

Modbus ports configuration commands

Network settings

Changing username or password

Configuration by the Telnet Console

Reset to Factory Defaults

Service mode

Procedure to enter service mode for G01 - G03 gateways

Procedure to enter service mode for G14 - G16 gateways

List of commands in the service mode

Additional notes

Products family sample photo

Datasheet-ID: