Ebyte ME31-XXAX0060 User manual

ME31-XXAX0060
Network I/O Networking Module
This manual may be updated with product improvements, please refer to the latest version of the
manual! Chengdu Yibaite Electronic Technology Co., Ltd. reserves the final interpretation and
modification rights for all contents in this instruction!

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Contents
I. Overview .......................................................................................................................................... 3
1.1 Product Introduction .........................................................................................................................................3
1.2 Functional Features .......................................................................................................................................... 3
1.3 Product Application Topology Diagram .......................................................................................................... 3
II.Quick use .................................................................................................................................................................... 5
2.1 Device preparation ........................................................................................................................................... 5
2.2 Device connection ............................................................................................................................................ 6
2.2.1 RS485 connection ................................................................................................................................. 6
2.2.2 Relay output connection ........................................................................................................................6
2.2.3 Simple use ............................................................................................................................................. 7
2.3 Parameter Configuration .................................................................................................................................. 7
2.4 Control Testing ................................................................................................................................................. 8
2.4.1 Modbus TCP control ............................................................................................................................. 8
2.4.2 Modbus RTU control .............................................................................................................................9
III. Technical Specification .......................................................................................................................................... 10
3.1 Specifications ................................................................................................................................................. 10
3.2 Device Default Parameters .............................................................................................................................10
3.3 Mechanical Dimensional Drawing .................................................................................................................11
3.4 Port and indicator light description ................................................................................................................12
IV. Product Function Introduction ................................................................................................................................14
4.1 DO output ....................................................................................................................................................... 14
4.1.1. Input count ..........................................................................................................................................14
4.1.2. Level output ........................................................................................................................................14
4.1.3. Pulse output ........................................................................................................................................ 14
4.1.4. Follow mode .......................................................................................................................................14
4.1.5. Reverse follow mode ..........................................................................................................................15
4.1.6. Trigger toggle mode ........................................................................................................................... 15
4.1.7. Power-on state .................................................................................................................................... 15
4.2 Modbus Gateway ............................................................................................................................................15
4.2.1. Modbus TCP/RTU protocol conversion ............................................................................................ 15
4.2.2. Modbus Address Filtering ..................................................................................................................15
4.2.3. Modbus TCP Protocol Data Frame Description ................................................................................ 16
4.2.4. Modbus RTU protocol data frame description .................................................................................. 16
4.3 Active upload ..................................................................................................................................................16
4.4 Custom Module Information ..........................................................................................................................17
4.4.1. Modbus Address .................................................................................................................................17
4.4.2. Module Name .....................................................................................................................................17
4.4.3. Network parameters ........................................................................................................................... 17
4.4.4. Serial Port Parameters ........................................................................................................................ 17
4.5 OLED display and parameter configuration .................................................................................................. 18
4.5.1. Information Display Interface ............................................................................................................18

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4.5.2. Equipment parameter display interface ............................................................................................. 18
4.5.3. Equipment Parameter Configuration Interface .................................................................................. 19
4.5.4. Screen Sleep ....................................................................................................................................... 19
4.6 MODBUS parameter configuration ............................................................................................................... 20
4.6.1. DO Register List .................................................................................................................................20
4.6.2. Module related registers .....................................................................................................................21
4.6.3. Network related registers ................................................................................................................... 21
4.6.4. Examples of Modbus command operation instructions .....................................................................22
V. Configuration Software ............................................................................................................................................25
5.1. Acquisition and Control ................................................................................................................................ 25
5.2. Parameter configuration interface .................................................................................................................26

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I. Overview
1.1 Product Introduction
ME31-XXAX0060 is equipped with 6-way A-type relay output, and
supports Modbus TCP protocol or Modbus RTU protocol for acquisition and
control. At the same time, the device is also a network I/O networking module
that can be used as a simple Modbus gateway (automatically send commands
with non-local Modbus addresses through the serial port/network port).
1.2 Functional Features
Support standard Modbus RTU protocol and Modbus TCP protocol;
Support various configuration software/PLC/touch screen;
RS485 acquisition control I/O;
RJ45 acquisition control I/O, support 4-way host access;
Support OLED display to display status information, and configure device parameters through buttons;
6-way switch output DO (A-type relay);
Switch output (DO) supports level mode, pulse mode, follow mode, reverse follow mode, trigger flip mode;
Support custom Modbus address setting;
Support 8 common baud rate configurations;
Support DHCP and static IP;
Support DNS function, domain name resolution;
Support Modbus gateway function;
1.3 Product Application Topology Diagram
Network interface application topology diagram

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Serial port application topology diagram

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II.Quick use
【Note】This test needs to be carried out with the default factory parameters.
2.1 Device preparation
The following table lists the items required for this test:
ME31-XXAX0060
12V switching power
supply
USB to RS485 Cable
A computer
A network cable
Several cables

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2.2 Device connection
2.2.1 RS485 connection
Note: When the 485 bus high-frequency signal is transmitted, the signal wavelength is shorter than the transmission
line, and the signal will form a reflected wave at the end of the transmission line, which will interfere with the original
signal. Therefore, it is necessary to add a terminal resistor at the end of the transmission line so that the signal does not
reflect after reaching the end of the transmission line. The terminal resistance should be the same as the impedance of the
communication cable, the typical value is 120 ohms. Its function is to match the bus impedance and improve the
anti-interference and reliability of data communication.
2.2.2 Relay output connection
External power supply
ME31 Device
User’s RS485 Device
Load

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2.2.3 Simple use
Wiring: The computer is connected to the RS485 interface of ME31-XXAX0060 through USB to RS485, A is
connected to A, and B is connected to B.
Networking: Insert the network cable into the RJ45 port and connect to the PC.
Power supply: Use DC-12V switching power supply (DC 8~28V) to power ME31-XXAX0060.
2.3 Parameter Configuration
Step 1: Modify the IP address of the computer to be consistent with the device. Here I am modifying it to
192.168.3.100 to ensure that it is on the same network segment as the device and that the IP is different. If you
cannot connect to the device after the above steps, please turn off the firewall and try again;
Step 2: Open the network assistant, select the TCP client, enter the remote host IP192.168.3.7 (default parameter),
enter the port number 502 (default parameter), and select HEX to send.
Network port

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2.4 Control Testing
2.4.1 Modbus TCP control
Use the network assistant to control the first DO output of ME31-XXAX0060.
Other functions can be tested through the commands in the table below.
The device is in server mode, and the
computer connects to the device as a client.
Enter the IP address of the device.
Enter the port number of the device.
Select HEX display to facilitate observation
of data.
Select HEX to send
1: Transaction ID
2: Protocol identifier
3: Length
4: Modbus address
5: Function code
6: First address
7: Opcode

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Function (function code)
Command
Pull in the first coil (0x05)
01 00 00 00 00 06 01 05 00 00 FF 00
Full open command (0x0F)
02 00 00 00 00 08 01 0F 00 00 00 06 01 3F
Full close command (0x0F)
02 00 00 00 00 08 01 0F 00 00 00 06 01 00
Read all DO status (0x01)
01 00 00 00 00 06 01 01 00 00 00 06
2.4.2 Modbus RTU control
Use the serial port assistant to control the first DO output of ME31-XXAX0060.
Other functions can be tested through the commands in the table below.
Function (function code)
Command
Pull in the first coil (0x05)
01 05 00 00 FF 00 8C 3A
Full open command (0x0F)
01 0F 00 00 00 06 01 3F DF 46
Full close command (0x0F)
01 0F 00 00 00 06 01 00 9F 56
Read all DO status (0x01)
01 01 00 00 00 06 BC 08

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III. Technical Specification
3.1 Specifications
Category
Name
Parameters
Power supply
Operating Voltage
DC8～28V
Power indicator
Blue LED indication
Serial port
Communication
Interface
RJ45、RS485
Baud rate
9600bps (customizable)
Protocol
Standard Modbus TCP, Modbus RTU protocol
MODBUS
Device address
Can be modified by Modbus command and host
computer
DO output
Number of DO
channels
6 way
DO output type
Form A relay
DO output mode
Level output, pulse output
Relay contact
capacity
30V/5A, 250V/5A
Output indication
OLED screen display, red LED indication
Other
Product Size
121mm * 72mm * 34mm (L*W*H)
Product weight
150 ±5 g
Working
temperature and
humidity
-40 ～+85℃, 5% ～95%RH (no condensation)
Storage
temperature and
humidity
-40 ～+105℃, 5% ～95%RH (no
condensation)
Installation method
Din-rail installation
3.2 Device Default Parameters
Category
Name
Parameters
Ethernet parameters
Operating mode
TCP server (up to 4-way client
access)
Local IP
192.168.3.7
Local port
502
Subnet mask
255.255.255.0

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Gateway address
192.168.3.1
DHCP
Close
Native MAC
Determined by the chip (fixed)
Target IP
192.168.3.3
Target port
502
DNS server
114.114.114.114
Active upload
Close
Serial parameters
Baud rate
9600bps (8 types)
Check method
None (default), Odd, Even
Data bit
8
Stop bit
1
MODBUS parameter
Modbus master-slave
Slave
Address
1
3.3 Mechanical Dimensional Drawing

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3.4 Port and indicator light description
No.
Label
Illustrate
1
TX（LED）
Serial port send data indicator light
2
RX（LED）
Serial port receiving data indicator light
3
LINK（LED）
Network connection light
4
NET（LED）
Network data sending and receiving indicator light
5
PWR（LED）
Power input indicator
6
DO1（LED）
The first relay output indicator
7
DO2（LED）
The second relay output indicator
8
DO3（LED）
The third relay output indicator
9
DO4（LED）
The fourth relay output indicator
10
DO5（LED）
Fifth relay output indicator
11
DO6（LED）
Sixth relay output indicator
12
GND
Negative pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.
13
VCC
Positive pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.
14
NO1
Relay 1 normally open pin, used with relay 1 common terminal, 5.08mm
Phoenix terminal.
15
COM1
Common terminal of relay 1, used in conjunction with the normally open pin of

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relay 1, 5.08mm Phoenix terminal.
16
NO2
Relay 2 normally open pin, used with relay 2 common terminal, 5.08mm
Phoenix terminal.
17
COM2
Common terminal of relay 2, used in conjunction with the normally open pin of
relay 2, 5.08mm Phoenix terminal.
18
NO3
Relay 3 normally open pin, used with relay 3 common terminal, 5.08mm
Phoenix terminal.
19
COM3
Common terminal of relay 3, used in conjunction with the normally open pin of
relay 3, 5.08mm Phoenix terminal.
20
NO4
Relay 4 normally open pin, used with relay 4 common terminal, 5.08mm
Phoenix terminal.
21
COM4
Relay 4 common terminal, used with relay 4 normally open pin, 5.08mm
Phoenix terminal.
22
Ethernet
Ethernet interface, standard RJ45 interface.
23
COM6
Common terminal of relay 6, used in conjunction with the normally open pin of
relay 6, 5.08mm Phoenix terminal.
24
NO6
Relay 6 normally open pin, used with relay 6 common terminal, 5.08mm
Phoenix terminal.
25
COM5
Common terminal of relay 5, used in conjunction with the normally open pin of
relay 5, 5.08mm Phoenix terminal.
26
NO5
Relay 5 normally open pin, used with relay 5 common terminal, 5.08mm
Phoenix terminal.
27
GND
Signal ground, 5.08mm Phoenix terminal.
28
485-A
The A of the serial port is connected to the A interface of the external device,
and the 5.08mm Phoenix terminal.
29
485-B
The B of the serial port is connected to the B interface of the external device,
and the 5.08mm Phoenix terminal.

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IV. Product Function Introduction
4.1 DO output
Relay output mode: output different mode output according to the mode set by the user, and the level output is
turned on by default.
4.1.1. Input count
Support counting DI input, users can configure rising edge acquisition, falling edge acquisition, and level
acquisition according to their own needs. You can also change the clearing method according to your needs.
Trigger method:
Rising edge: When the rising edge is collected (it is not counted when it is turned on, it is counted when it is
turned off), it will be counted once.
Falling edge: When the falling edge is collected (counting when it is turned on, and not counting when it is
released), count once.
Level: Two edges are collected and counted once respectively.
Clearing method:
Automatic: The device will automatically clear each time the DI count value register (0x09DF~0x09E6) is
read.
Manual: In manual mode, it is necessary to write 1 to the clear signal register (0x0AA7~0x0AAE), and each
holding register controls one clear signal.
4.1.2. Level output
Output according to the level set by the user, the switch characteristic of the level mode is similar to the
function of a self-locking switch.
4.1.3. Pulse output
After the switch output DO is turned on, the switch output DO is automatically turned off after maintaining the
set pulse width time (in ms). The pulse width setting range is 50~65535ms (50ms by default).
4.1.4. Follow mode
According to the follow source configured by the user (when the device has AI acquisition or DI detection
function, both DI or AI can be used as the follow source, otherwise this function is useless) to change the relay state,
and multiple outputs can follow the same follow source output. To put it simply, DI detects the input, and
automatically outputs a relay that uses it as a follow source (for example: DI is 1, DO is closed). When the follow

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mode is turned on, the follow source should be configured at the same time, otherwise it will follow the first input
by default.
4.1.5. Reverse follow mode
According to the follow source configured by the user (when the device has AI acquisition or DI detection
function, both DI or AI can be used as the follow source, otherwise this function is useless) to change the relay state,
and multiple outputs can follow the same follow source output. To put it simply, DI detects the input, and
automatically outputs the relay that follows it as the source (for example: DI is 1, DO is disconnected). When the
follow mode is turned on, the follow source should be configured at the same time, otherwise it will follow the first
input by default.
4.1.6. Trigger toggle mode
According to the follow source configured by the user (when the device has AI acquisition or DI detection
function, both DI or AI can be used as the follow source, otherwise this function is useless) to change the relay state,
and multiple outputs can follow the same follow source output. Simply put, when DI generates a trigger signal
(rising edge or falling edge), DO will have a state change. When the trigger flip mode is turned on, the following
source should be configured at the same time, otherwise it will follow the first input by default.
4.1.7. Power-on state
According to the state set by the user. After the device is powered on, the output relay is turned on according
to the state set by the user, and it is turned off by default.
4.2 Modbus Gateway
The device can transparently transmit non-native Modbus commands from the network/serial port to the serial
port/network, and the local Modbus commands are directly executed.
4.2.1. Modbus TCP/RTU protocol conversion
After it is turned on, the Modbus TCP data on the network side will be converted to Modbus RTU data.
4.2.2. Modbus Address Filtering
This function can be used when some host software or configuration screen is used as the host to access the
serial port of the device, and the gateway function of the device is used, the slave is at the network end, and the
Modbus TCP to RTU function is turned on. Multiple slaves on the bus may cause data confusion. At this time,
enabling address filtering can ensure that only the specified address can pass through the device; when the
parameter is 0, the data will be transparently transmitted; when the parameter is 1-255, only the set slave machine

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address data.
4.2.3. Modbus TCP Protocol Data Frame Description
TCP frame format：
Transaction ID
Protocol ID
Length
Device address
Function code
Data segment
2 Bit
2 Bit
N+2 Bit
1 Bit
1 Bit
N Bit
Transaction ID: It can be understood as the serial number of the message. Generally, 1 is added after each
communication to distinguish different communication data messages.
Protocol identifier: 00 00 means Modbus TCP protocol.
Length: Indicates the length of the next data in bytes.
Example: get DI status
01 00
00 00
00 06
01
02
00 00 00 04
Transaction ID
Protocol ID
Length
Device address
Function code
Data segment
4.2.4. Modbus RTU protocol data frame description
RTU frame format：
Device address
Function code
Data segment
Check codeCRC
1 Bit
1 Bit
N Bit
2 Bit
Example: get DI status command
01
02
00 00 00 04
79 C9
Device Modbus address
Function code
Data segment
CRC check code
4.3 Active upload
The device supports the function of uploading analog input values at regular intervals. Setting the value of the
corresponding register can control the interval time and whether to upload.
Devices with digital input will actively upload once after successfully connecting to the server, and then the digital
input will be uploaded following the status change. Devices with analog input will report the status of analog input
according to the configured active upload time period (the configuration period is 1-65535 ).
When it is set to 0, the upload is disabled; if it is set to other positive integer value N, the upload will be performed
at intervals of N seconds.
[Note] The device can only be valid if it is configured in client mode, and the register value is non-zero to enable
active upload.

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4.4 Custom Module Information
4.4.1. Modbus Address
The device address is 1 by default, and the address can be modified, and the address range is 1-247.
4.4.2. Module Name
Users can configure the device name according to their own needs to distinguish, support English, digital
format, up to 20 bytes.
4.4.3. Network parameters
Unless otherwise specified: the following network-related parameters default to IPV4-related
parameters.
(1) MAC of the device: the user can obtain it by reading the specified register, and this parameter cannot be
written.
(2) IP address: device IP address, readable and writable.
(3) Modbus TCP port: the port number of the device, readable and writable.
(4) Subnet mask: address mask, readable and writable.
(5) Gateway address: gateway.
(6) DHCP: Set the way the device obtains IP: static (0), dynamic (1).
(7) Target IP: When the device works in client mode, the target IP or domain name of the device connection.
(8) Destination port: When the device is working in client mode, the destination port of the device
connection.
(9) DNS server: The device is in the client mode and resolves the domain name of the server.
(10) Module working mode: switch the working mode of the module. Server: The device is equivalent to a
server, waiting for the user's client to connect. The maximum number of connections is 4. Client: The device
actively connects to the target IP and port set by the user.
(11) Active upload: When this parameter is not 0, and the device is in the client mode, the discrete input status
of the device will be uploaded to the server when it is connected for the first time or the input changes, and the
analog input will be uploaded according to the configured time period.
4.4.4. Serial Port Parameters
Parameters for setting serial communication:
Default parameters:
Baud rate: 9600 (03);
Data bit: 8bit;
Stop bit: 1bit;

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Check digit: NONE(00);
(1) Baud rate：
Baud rate code value table
0x0000
1200
0x0001
2400
0x0002
4800
0x0003（default）
9600
0x0004
19200
0x0005
38400
0x0006
57600
0x0007
115200
(2) Check Digit：
Check Digit
0x0000(default)
NONE
0x0001
ODD
0x0002
EVEN
4.5 OLED display and parameter configuration
The display interface includes an information display page (DO status display page) and a parameter setting
page (partial parameters).
4.5.1. Information Display Interface
Including the DO status display page, short press the up and down buttons to switch the interface.
4.5.2. Equipment parameter display interface
Press the left or right button to enter the password input interface, complete the correct password input, and
display the device parameter information interface (password interface: default password: 0000. Short press the
middle to verify the password; The left and right buttons can switch the password bit; Up and down keys can
switch the value of the current bit. The password has a total of 4 digits, and each input is a number ranging from
0-9):
The parameter setting interface from top to bottom is:
1. Modbus address;
2. Baud rate;
3. Data bits;
4. Check Digit;
5. Stop bit;

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6. Local port;
7. Local IP address;
8. Network mode;
9. Gateway;
10. Subnet mask;
11. DNS;
12. MAC address;
13. DHCP;
14. Target IP;
15. Destination port;
16. Modbus TCP/RTU protocol conversion;
17. Active upload;
18. Modbus address filtering;；
4.5.3. Equipment Parameter Configuration Interface
Press and hold the confirmation button to enter the password input interface, complete the correct password
input, and enter the configuration interface (password interface: default password: 0000; short press the middle to
verify the password, the left and right buttons switch the password bit, and the up and down buttons switch the
value of the current bit , the password has a total of 4 digits, and each input range is a number from 0-9).
Select the setting item, enter the parameter configuration page and short press the up and down keys to switch
the setting item;
Select the setting item, short press to confirm or right click, the setting item gets the cursor to represent the
selection and enter the setting item;
Adjust the parameter value: After selecting the setting item, the up and down keys can change the value or
optional value; the left and right keys move the cursor in the parameter item;
Confirm the parameter value: After adjusting the parameter value, press the enter key to exit the current
setting item.
Save parameter settings and restart: After setting the parameters, move the cursor to save and restart, then
short press the confirmation key to enter the confirmation save and restart state. Short press the confirmation key
(press other keys to exit the confirmation state) to save the parameters and restart the device.
Exit without saving parameters: move the cursor to exit, then short press the confirmation key to enter the
confirmation exit state, short press the confirmation key (press other keys to exit the confirmation state), and then
exit the parameter configuration interface without saving the parameters .
Among them, the data bit and stop bit cannot be set. After the DHCP mode is turned on, the local IP address,
gateway, and subnet mask cannot be configured and are only assigned by the router;
4.5.4. Screen Sleep
The device screen has a sleep function, which is off by default and can be set to on in the configuration
interface.
In any interface, when there is no button operation for 180 seconds, the screen will enter the sleep mode. At
this time, the interface displays Ebyte robot. Press any button can exit the sleep mode.
When the screen is in sleep mode, the running efficiency of device programs will be improved.