Ebyte ME31-XAAX0440 User manual

ME31-XAAX0440
I/O networking module

Chengdu Ebyte Electronic Technology Co., Ltd. ME31- XAAX0440 _User Manual
Copyright © 2012–2023 , Chengdu Ebyte Electronic Technology Co., Ltd.
I
Contents
Chapter 1Product Overview ........................................................................................................................................... 1
1.1 Product introduction .........................................................................................................................................1
1.2 Features .............................................................................................................................................................1
1.3 Application topology diagram ..........................................................................................................................2
Chapter 2 Quick Start ..................................................................................................................................................... 3
2.1 Device required ................................................................................................................................................ 3
1.2 Device connection ............................................................................................................................................ 4
2.2.1RS485 connection .................................................................................................................................. 4
2.2.2A I analog input connection ................................................................................................................... 5
2.2.3 Relay output connection ........................................................................................................................5
2.2.4 Easy to use .............................................................................................................................................6
2.3 Parameter configuration ................................................................................................................................... 6
2.4 control test ........................................................................................................................................................ 7
2.4.1Modbus TCP control .............................................................................................................................. 7
2.4.2Modbus RTU control ..............................................................................................................................8
Chapter 3 Technical indicators ..................................................................................................................................... 10
3.1Specifications and parameters .........................................................................................................................10
3.2Device default parameters ............................................................................................................................... 11
3.3 Dimensions .....................................................................................................................................................12
3.4 Ports and Indicators ........................................................................................................................................13
Chapter 4 Product function introduction ......................................................................................................................15
4.1AI input ............................................................................................................................................................15
4.1.1Analog range ........................................................................................................................................ 15
4.1.2 Trigger mode ....................................................................................................................................... 15
4.1.3Engineering quantity integer value and engineering quantity floating point value of analog input ...16
4.1.4AI filter parameters .............................................................................................................................. 16
4.2DO output ........................................................................................................................................................ 16
4.2.1 Input count ...........................................................................................................................................16
4.2.2 level output..........................................................................................................................................17
4.2.3 Pulse output ......................................................................................................................................... 17
4.2.4 follow mode .........................................................................................................................................17
4.2.5 reverse follow mode ............................................................................................................................17
4.2.6 trigger flip mode ..................................................................................................................................17
4.2.7 power-on state ..................................................................................................................................... 18
4.3 Modbus gateway .............................................................................................................................................18
4.3.1 Modbus TCP/RTU protocol conversion ............................................................................................. 18
4.3.2 Mod bus address filtering ....................................................................................................................18
4.3.3 Mod bus TCP protocol data frame description ................................................................................... 18
4.3.4 Mod bus RTU protocol data frame description .................................................................................. 19
4.4 IO linkage function .........................................................................................................................................19
4.5 Active upload ..................................................................................................................................................19
4.6 Custom module information ...........................................................................................................................20

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4.6.1 Mod bus address ..................................................................................................................................20
4.6.2 Module name .......................................................................................................................................20
4.6.3 Network parameters ............................................................................................................................ 20
4.6.4 Serial parameters ................................................................................................................................. 20
4.7 OLED display and parameter configuration .................................................................................................. 21
4.7.1 Information display interface .............................................................................................................. 21
4.7.2 Device parameter display interface .....................................................................................................21
4.7.3 Device parameter configuration interface ...........................................................................................22
4.7.4 Screen sleep .........................................................................................................................................22
4.8 MODBUS parameter configuration ............................................................................................................... 23
4.8.1 A I register list ..................................................................................................................................... 23
4.8.2 DO register list .................................................................................................................................... 23
4.8.3 Module Related Registers ................................................................................................................... 24
4.8.4 Network related registers .................................................................................................................... 25
4.8.5 M od bus instruction operation example .............................................................................................26
Chapter 5 Configuration software ................................................................................................................................ 29
5.1 Acquisition and Control ................................................................................................................................. 29
5.2 Parameter setting ............................................................................................................................................ 30
Revision history ............................................................................................................................................................33
About Us .......................................................................................................................................................................33

Chengdu Ebyte Electronic Technology Co., Ltd. ME31- XAAX0440 _User Manual
Copyright © 2012–2023 , Chengdu Ebyte Electronic Technology Co., Ltd.
1
Chapter 1Product Overview
1.1 Product introduction
ME31- XAAX0440 is equipped with 4-way A-type relay output
and 4 -way analog (0-20 mA / 4-20mA) input, supports Modbus TCP
protocol or Modbus RTU protocol for acquisition and control, and the
device can also be used as a simple Modbus The network I/O
networking module used by the gateway (automatically sends the
commands of the non-local Modbus address through the serial
port/network port) .
1.2 Features
Support standard Mod b us RTU protocol and Mod b us TCP protocol ;
Support various configuration software/PLC/touch screen;
RS485 acquisition control I/O;
R J45 acquisition and control I /O , support 4- way host access;
Support OLED display to display status information, and configure device parameters through buttons;
4 analog inputs (0-20 mA / 4-20mA ) ;
4-way switch output DO ( Form A 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;
Support input and output linkage;

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1.3 Application topology diagram
Network port application topology
Serial port application topology diagram

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Chapter 2 Quick Start
[Note] This experiment needs to be carried out with the default factory parameters.
2.1 Device required
The following table lists the materials required for this test:
M E31- XAAX0440
1 2V switching power
supply
USB to R S485
computer
a network cable
Several cables

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1.2 Device connection
2.2.1RS485 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.

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2.2.2A I analog input connection
2.2.3 Relay output connection

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2.2.4 Easy to use
Wiring: The computer is connected to the RS485 interface of ME31 - XAAX0440 through USB to RS485 , A is connected to A, and B is connected to B.
Networking: the network cable is inserted into the R J45 port and connected to the PC .
Power supply: Use DC - 1 2V switching power supply (DC 8 ~ 28 V ) to power ME31 - XAAX0440 .
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 1
92.168.3.100 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 IP 1 92.168.3.7 ( default
parameter), enter the port number 5 02 (default parameter), and select HEX to send.

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2.4 control test
2.4.1Modbus TCP control
the first D O output of M E31- XAAX0440 .

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Other functions can be tested through the commands in the table below.
function (function code)
instruction
Pull in the first coil (0x 05 )
01 00 00 00 00 06 01 05 00 00 FF 00
Full open command (0x 0F )
02 00 00 00 00 08 01 0F 00 00 00 04 01 0F
All close command (0x 0F )
02 00 00 00 00 08 01 0F 00 00 00 04 01 00
Read all D O status (0x 01 )
0 1 00 00 00 00 06 01 01 00 00 00 04
2.4.2Modbus RTU control
the first D O output of M E31- XAAX0440 .

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Other functions can be tested through the commands in the table below.
function (function code)
instruction
Pull in the first coil (0x 05 )
01 05 00 00 FF 00 8C 3A
Full open command (0x 0F )
01 0F 00 00 00 04 01 0F 7 E 92
All close command (0x 0F )
01 0F 00 00 00 04 01 00 3E 96
Read all D O status (0x 01 )
01 1 00 00 00 04 3D C9

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Chapter 3 Technical indicators
3.1Specifications and parameters
category
name
parameter
power supply
Operating Voltage
D C8 ~ 2 8V
Power indicator
Blue LED indication
serial port
Communication
Interface
RJ45 , RS485
baud rate
9600 bps (customizable)
Protocol
Standard Modbus TCP , Modbus RTU protocol
MODBUS _
device address
Can be modified by Modbus command and host
computer
AI input
Number of AI
channels
4 way
Acquisition
Features
single-ended input
input type
0-20mA , 4-20mA _ _ _
AI Resolution _
3‰
Acquisition
frequency
1 0 Hz
input instructions
OLED screen display
DO output
Number of DO
channels
4 way
DO output type
Form A relay
DO output mode
Level output, pulse output
Relay contact
capacity
30V/ 5A , 250V/ 5A
output indication
OL ED screen display, red LED indication
other
Product Size
121 mm * 72mm * 34mm ( L*W*H )
product weight
1 45 ± 5g _
Working
temperature and
humidity
-40 ～+85℃, 5% ～95%RH (no
condensation)
storage temperature
and humidity
-40 ～+105℃, 5% ～95%RH (no
condensation)
installation method
rail installation

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3.2Device default parameters
category
name
parameter
Ethernet parameters
Operating mode
T CP server (up to 4 clients access)
Local IP
1 92.168.3.7
local port
5 02
subnet mask
2 55.255.255.0
gateway address
192.168.3.1
D HCP
closure
Native MAC
Determined by the chip (fixed)
Target IP
1 92.168.3.3
target port
5 02
DNS server _
114 . 114 . 114 . 114
active upload
closure
Serial parameters
baud rate
9 600bps (8 types)
Check method
None (default), Odd, Even
data bit
8
stop bit
1
MODBUS parameters
_
M odbus master-slave
Slave
address
1

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3.3 Dimensions

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3.4 Ports and Indicators
serial
number
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
1 0
GND
Negative pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.
1 1
VCC
Positive pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.
1 2
NO1
Relay 1 normally open pin, used with relay 1 common terminal, 5.08mm
Phoenix terminal.
1 3
COM1
Common terminal of relay 1, used in conjunction with the normally open pin of
relay 1, 5.08mm Phoenix terminal.

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1 4
NO2
Relay 2 normally open pin, used with relay 2 common terminal, 5.08mm
Phoenix terminal.
1 5
COM2
Common terminal of relay 2, used in conjunction with the normally open pin of
relay 2, 5.08mm Phoenix terminal.
1 6
NO3
Relay 3 normally open pin, used with relay 3 common terminal, 5.08mm
Phoenix terminal.
1 7
COM3
Common terminal of relay 3, used in conjunction with the normally open pin of
relay 3, 5.08mm Phoenix terminal.
1 8
NO4
Relay 4 normally open pin, used with relay 4 common terminal, 5.08mm
Phoenix terminal.
1 9
COM4
Relay 4 common terminal, used with relay 4 normally open pin, 5.08mm
Phoenix terminal.
2 0
Ethernet
Ethernet interface, standard RJ45 interface.
2 1
AI 4
Analog input channel 4 , supports 0 to 20mA current input, 5.08mm Phoenix
terminal.
2 2
AI 3
Analog input channel 3 , supports 0 to 20mA current input, 5.08mm Phoenix
terminal.
2 3
AI2
Analog input channel 2, supports 0 to 20mA current input, 5.08mm Phoenix
terminal.
2 4
AI 1
Analog input channel 1 , supports 0 to 20mA current input, 5.08mm Phoenix
terminal.
2 5
GND
Channel 1-4 analog input ground, 5.08mm Phoenix terminal.
2 6
485-A
The A of the serial port is connected to the A interface of the external device,
and the 5.08mm Phoenix terminal.
2 7
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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Chapter 4 Product function introduction
4.1AI input
4.1.1Analog range
The analog input AI measures the current signal, the acquisition range is 0-20mA or 4-20mA, the precision is
3 ‰, and the resolution is 12 bits. Single-ended input is adopted , the sampling frequency is 10Hz, and the
input impedance is 100Ω .
Set the sampling range of all AI channels, valid values are 1 and 0 (default 0).
Configured as 0: means 0~20mA
Configured as 1: means 4~20mA
[Note] AI configuration instructions
( 1) The AI sampling range of each channel can be set . When the AI channel sampling range is configured as
4-20mA sampling, if the current signal is lower than 3.5 mA is displayed as 0, and when it is higher than 3.5 mA
and lower than 4mA, it is displayed as 4 . There is no conversion limit for signals greater than 20mA, but it cannot
exceed 25mA (there will be equipment damage risk if it exceeds 25mA).
( 2) The starting address of the AI channel sampling range parameter is 0x04B2, the register type is holding
register, and the function code is 0x06, 0x10. When writing AI channel sampling range parameters, if the written
parameter value is not within the range of 0 to 1, it will automatically take the closest value and write it in. If the
sampling range parameter is 2, the device will take 1 as the sampling range parameter. And M odbus will not return
wrong command.
4.1.2 Trigger mode
( 1) Not trigger: mode off .
(2 ) Rising trigger: When the AI input value becomes greater than the set AI trigger high value, the AI trigger
is high (that is, the output state is 1), and a rising edge trigger is generated. After the trigger, as long as the AI value
is not lower than the set When the AI trigger is low, the current output value is always 1 (can be linked with DO) .
(3 ) Falling trigger: When the AI input value becomes less than the set AI trigger low value, the AI trigger is
low (that is, the output state is 0), and a falling edge trigger is generated. After the trigger, as long as the AI value is
not higher than the set When the AI trigger is at a high value, the current output value is always 0 (can be linked
with DO) .
(4 ) Bilateral trigger: When the AI input value becomes greater than the set AI trigger high value, the AI trigger
is high (that is, the output state is 1), and a rising edge trigger is generated. After the trigger, as long as the AI value
is not lower than the set When the AI trigger is low, the current output value is always 1; when the AI input value
becomes smaller than the set AI trigger low value, the AI trigger is low (that is, the output state is 0), and a falling
edge trigger is generated. After the trigger As long as the AI value is not higher than the set AI trigger high value,
the current output value is always 0 (can be matched with DO linkage) .

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4.1.3Engineering quantity integer value and engineering quantity floating
point value of analog input
There are two ways to read the current signal collected by the device:
(1 ) Read the AI engineering volume shaping value, and directly convert to get the input current. The starting
address of the register of AI engineering quantity shaping value is 0x0064, the register type is input register, and the
read function code is 0x04. The value returned by this method represents one channel per register , and the value
read is 0 to 25000. The method of calculating the current is 0~25000 corresponding to 0~25mA. That is :
Current = engineering value / 1000 (m A)
(2 ) Read the floating-point value of the AI engineering quantity , and use the IEE754 conversion tool to
convert the hexadecimal data into a floating-point number to obtain the input current. The starting address of the
register of AI engineering quantity shaping value is 0x00 C8 , the register type is input register, and the read
function code is 0x04. This method returns two registers representing 1 channel.
4.1.4AI filter parameters
AI channel can be set , the effective value is 1-16 , and the default value is 6.
Description of filtering parameters:
(1) All AI channels share a filter parameter. The higher the parameter value, the more stable the output value and
the slower the response.
(2) The AI channel filter parameter address is 0x04B0, and the register type is a holding register. Function code
0x06, 0x10.
(3) When writing AI filter parameters, if the written parameter value is not within the range of 1 to 16, it will
automatically take the closest value and write it in. If the write filter parameter is 0, the device will take 1 as the
filter parameter, and Modbus does not return error commands .
4.2DO output
The output mode of the relay can output different mode outputs according to the mode set by the user, and the
level output is turned on by default.
4.2.1 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

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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 the DI count value register (0x 09DF ~ 0x 09E6 ) every time it
is read.
Manual: Manual mode needs to write 1 to the clear signal register (0x 0AA7 ~ 0x 0AAE ), and each holding
register controls one clear signal respectively.
4.2.2 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.
4.2.3 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 (the default is 50 ms ).
4.2.4 follow mode
According to the following source configured by the user (when the device has AI acquisition or DI detection
function, both DI or AI can be used as the following source, otherwise this function is useless) to change the relay
state, multiple outputs can follow the same follow source output, simply put DI detects the input, and automatically
outputs the relay that takes it as the following source (for example: DI is 1, DO is closed ). 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.
4.2.5 reverse follow mode
According to the following source configured by the user (when the device has AI acquisition or DI detection
function, both DI or AI can be used as the following source, otherwise this function is useless) to change the relay
state, multiple outputs can follow the same follow source output, simply put DI detects the input, and automatically
outputs the relay as the following 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.
4.2.6 trigger flip mode
According to the following source configured by the user (when the device has AI acquisition or DI detection