Volison ADM-5850G User Manual

Modbus Gateway User's Manual

ADM-5850G

Functional introduction

The Modbus protocol is the most widely used protocol in the electronic industrial
equipment, and now it has become a general industrial standard. Through this protocol,
Modbus devices (such as PLC, DCS, HMI, and instruments) can communicate with each other
through a network or serial port. But the Modbus protocol used in the serial port and the
Ethernet network is different, so a gateway is needed to complete the communication
conversion between the two protocols. ADM-5850G is a modbus gateway product dedicated
to connecting Modbus TCP devices and Modbus RTU/ASCII devices.

ADM-5850G has Modbus RTU/ASCII and Modbus TCP protocol conversion functions, it
integrates Modbus TCP, Modbus RTU and Modbus ASCII protocol, and the device's serial port
can be configured by software of RS-232, RS-485 or RS-422, you can easily achieve Modbus
Ethernet devices with Modbus serial devices connected.

Product features

1, 32 bit ARM Cortex-m3 CPU

2, 1 Port 10/100M Ethernet interface

3, Support RS-232, RS-422, RS-485 serial port mode

4. Baud rate, Data bit, Stop bit, Parity bit can be set

5. Integrated ARP, IP, ICMP, IGMP, UDP, TCP, DHCP, DNS,MODBUS TCP, MODBUS RTU,
MODBUS ASCII protocol

6. Provide 4 mode of work:

RTU_ Master--TCP_ Slaver, TCP_ Master--RTU_ Slaver
ASCII_ Master--TCP_ Slaver, TCP_ Master--ASCII_ Slaver

7. Maximum support for 32 Modbus TCP master stations and 4 Modbus TCP slave stations

8. The automatic adaptive function of the time interval of the character

9, Provide ID mapping function to realize the management of host ID number

10. The local port, the target IP address, and the target port number can be set

11, Can be configured through Web Server, Telnet, MG Configuration tools
12, MG Configuration tools support

Windows98/me/NT/2000/XP/WIN7/WIN8/WIN10 operating system

13, Industrial design, can run steadily in bad environment

Product specification

Ethernet

Standard: 10/100Mbps adaptive Ethernet port
Communication mode: full duplex / half duplex adaptive
Transmission distance: less than 100 meters
Interface type: RJ-45

Serial port

RS-232 signals: TXD, RXD, RTS, CTS, GND
RS-422 signals: T+, T-, R+, R­RS-485 signal: D+, D­Parity bit: None\Even\Odd\space\mark
Data bits: 6bit, 7bit, 8bit
Baud rate: 300BPS to 230400bps
Direction control: RS-485 uses data flow direction automatic control technology

Load capability: RS-485/422 terminal support maximum 32 node polling
Transmission distance: RS-485/422 is 1000 meters, RS-232 is 10 meters
Interface protection: 1500W surge protection, 15KV ESD protection
Interface type: RS-232 terminal DB-9 male, RS-485/422 terminal

Power Supply

Power input: DC9~48V power supply
Power consumption: 120mA @ 24V (Max)

Environmental

Working temperature: -20 C ~ 70 C
Storage temperature: -40 C ~ 95 C
Storage humidity: 5 ~ 95% RH

Package size

Long x wide x high: 103x72x27 (mm)

Interface definition

RS-232:DB9 male head (TXD, RXD, RTS, CTS, GND)
RS-422: terminal (T+, T-, R+, R-)
RS-485: terminal (D+, D-)
Network interface: RJ45 (Ethernet)
Power interface: terminal VS+, VS-

Restore the default settings

Hardware recovery: Setup and GND short connection, the gateway reboot, and then
disconnect Setup and GND, to restore the default settings.
Software recovery: Search the device through the MG Configuration tool software
and click to restore the factory settings button.

LED instructions

Power indication: "PWR" bright red is the normal power supply
Modbus TCP connection success indication: "Active" is bright green
Serial data sending and receiving indication: "TX/RX" is Flash

Typical application

Configuration instructions

There are three configurations of ADM-5850G, which are the Telnet console, the Web

server console, and the MG Configuration PC software configuration.

Web server console configuration instructions

1. Open the IE browser

Enter the IP address of the ADM-5850G Modbus gateway in the address bar
(default: 192.168.10.245)

2. Set the basic parameters

Gateway name：Device name (less than 11 characters).
Gateway address：The location of the device (less than 11 characters).
Web console："Enable" enables Web console, and "Disable" closes Web console.
Telnet console ： "Enable" enables Telnet console, and "Disable" closes the Telnet

console.

3. Network parameter configuration
MAC address：The MAC address of the ADM-5850G device can not be changed.
IP address：The IP address of the ADM-5850G device in the network.
Net mask：Subnet mask.
Gateway：Gateway address.
IP configuration：The type of IP address, DHCP: dynamic IP automatic acquisition,

Static: static IP address.
DNS server：When the target IP is a domain name, DNS server is the IP address of the
domain name resolution server.

4, Serial port configuration

Baud Rate：Serial baud rate, 300~230400 can be selected.
Data Bits：Serial data bit, 6,7,8 bit can be selected.
Stop Bits：The stop bit of the serial port can be selected as 1, 1.5, and 2 bits.
Parity：Parity bit, None\Even\Odd\space\mark can be selected, default is None
Timeout：Character timeout time. When the device uses Modbus RTU protocol, it can

encapsulate data frames by judging the character interval. If the character timeout time
is not accurate, it may cause CRC error. This value can be set (0~15000) milliseconds.
When set to 0, it automatically adapts to wait for 3.5 characters.

Interface：Serial interface type, can choose RS-232, RS-485, RS-422 three formats.

5, Modbus gateway operation mode configuration

ADM-5850G Modbus Gateway provides 4 work mode:
(1), TCP_ Master-RTU_ Slaver:

Network end connection Modbus TCP master station, serial connects Modbus RTU
slave station
(2), TCP_ Master-ASCII_ Slaver:

Network end connection Modbus TCP master station, serial port connects Modbus
ASCII slave station

Max connection：The maximum number of connections allowed by Modbus TCP master
station is 32. Users can adjust this parameter according to the actual application. When
users do not need 32 connections, they can be reduced to improve performance. The
effective range of the maximum number of connections is 1~32.

Local TCP port： The default port number of the standard Modbus TCP protocol is 502,
and the user can modify it according to the actual application.
Message Timeout： Message timeout time (milliseconds), Modbus is the M/S structure
protocol. When master station communicates with slave station, it needs to wait for the
slave station to respond. This time is "message timeout time", the effective range is
(100~32000) ms, and the default value of the parameter is 200 milliseconds.

ID Mapping：ID mapping capabilities, optional AUTO and Fixed.
AUTO： When Auto ID is selected, the ID number in the Modbus TCP master station

request frame is not modified and will be sent directly to the serial port slave station
device.
Fixed： When Fixed ID is selected, the ID number in the Modbus TCP master station
request frame is replaced with a fixed ID number and then sent to the serial port slave
station device. The serial port slave station device returns the frame, it's ID number is
converted to before the change, and then to the Modbus TCP master station.
Fixed ID Value： Fixed ID number, when selecting Fixed, Modbus Gateway uses this
fixed ID number to access the serial port slave device, the range is 1~247.

(3), RTU_ Master-TCP_ Slaver:

Network end connection Modbus TCP slave station, serial port connection Modbus
RTU master station
(4), ASCII_ Master-TCP_ Slaver:

Network end connection Modbus TCP slave station, serial port connection Modbus
ASCII master station

Destination IP address：When Modbus Gateway works in TCP_ Slaver mode, it can
support 4 Modbus TCP slave connections. Users can set IP address of target host to
connect Modbus TCP slave station. When the target connection is not used, the IP
address should be modified to 0.0.0.0. Otherwise, the Modbus Gateway device will
continuously send the connection request, so that it will affect the network
performance.When the target host address is a domain name, "/" is added before the
domain name, and "/" represents the domain name. The length must be less than 20
characters
Port：The port number of the target host, the default port number of the standard
Modbus TCP protocol is 502, and the user can modify it.

ID mapping:
Min ID/Max ID：The minimum value of ID and the maximum value of ID, and its range

is 0~247. When the serial Modbus master station connects TCP slave station, the Modbus
Gateway device will check whether the target is within the range, and if it is not in the

range, it will not be sent. Max ID can't be less than Min ID, otherwise it is treated as Min
ID. When Max ID<=Min ID, the Modbus Gateway device uses Min ID, and the ID range of
the 4 connections cannot be repeated, otherwise the error will occur.
ID offset：ID offset, the Modbus protocol stipulates that all slave station devices must
have a unique ID number (1~247), which is used to identify the slave station address.
The ID number of Modbus slave station device can be modified. When the Modbus serial
master station access the TCP slave station, the target ID will add the offset and then
sent to the Modbus TCP slave station. When the Modbus TCP slave station returns the
data, the offset is subtracted from the ID number and then sent to the serial port
MODBUS master station.

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