Ebyte Me31-aaax2240 User manual

ME31-AAAX2240

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!

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

Contents

I. Overview ..................................................................................................................................................................... 3

1.1 Product Introduction .........................................................................................................................................3

1.2 Functional Features .......................................................................................................................................... 3

1.3 Product Application Topology Diagram .......................................................................................................... 4

II.Quick use .................................................................................................................................................................... 5

2.1 Device preparation ........................................................................................................................................... 5

2.2 Device connection ............................................................................................................................................ 6

2.2.1 RS485 connection ................................................................................................................................. 6

2.2.2 AI analog input connection ................................................................................................................... 7

2.2.3. DI switch input connection .................................................................................................................. 7

2.2.4. Relay output connection .......................................................................................................................7

2.2.5 Simple use ............................................................................................................................................. 8

2.3 Parameter Configuration .................................................................................................................................. 8

2.4 Control Testing ................................................................................................................................................. 9

2.4.1 Modbus TCP control ............................................................................................................................. 9

2.4.2 Modbus RTU control ...........................................................................................................................10

III. Technical Specification ...........................................................................................................................................11

3.1 Specifications ..................................................................................................................................................11

3.2 Device Default Parameters .............................................................................................................................12

3.3 Mechanical Dimensional Drawing .................................................................................................................13

3.4 Port and indicator light description ................................................................................................................14

IV. Product Function Introduction ................................................................................................................................16

4.1 DI Input .......................................................................................................................................................... 16

4.1.1. Switch Input DI Collection ................................................................................................................ 16

4.1.2. Input filtering ......................................................................................................................................16

4.2 AI Input ...........................................................................................................................................................16

4.2.1. Analog range .......................................................................................................................................16

4.2.2. Trigger mode ...................................................................................................................................... 17

4.2.3. Engineering quantity shaping value and engineering quantity floating point value of analog input 17

4.2.4. AI filter parameters .............................................................................................................................17

4.3 DO output ....................................................................................................................................................... 18

4.3.1. Input count ..........................................................................................................................................18

4.3.2. Level output ........................................................................................................................................18

4.3.3. Pulse output ........................................................................................................................................ 18

4.3.4. Follow mode .......................................................................................................................................18

4.3.5. Reverse follow mode ..........................................................................................................................19

4.3.6. Trigger toggle mode ........................................................................................................................... 19

4.3.7. Power-on state .................................................................................................................................... 19

4.4 Modbus Gateway ............................................................................................................................................19

4.4.1. Modbus TCP/RTU protocol conversion ............................................................................................ 19

4.4.2. Modbus Address Filtering ..................................................................................................................19

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

4.4.3. Modbus TCP Protocol Data Frame Description ................................................................................ 20

4.4.4. Modbus RTU protocol data frame description .................................................................................. 20

4.5 IO linkage function .........................................................................................................................................20

4.6 Active upload ..................................................................................................................................................21

4.7 Custom Module Information ..........................................................................................................................21

4.7.1. Modbus Address .................................................................................................................................21

4.7.2. Module Name .....................................................................................................................................21

4.7.3. Network parameters ........................................................................................................................... 21

4.7.4. Serial Port Parameters ........................................................................................................................ 22

4.8 OLED display and parameter configuration .................................................................................................. 22

4.8.1. Information Display Interface ............................................................................................................22

4.8.2. Equipment parameter display interface ............................................................................................. 23

4.8.3. Equipment Parameter Configuration Interface .................................................................................. 23

4.8.4. Screen Sleep ....................................................................................................................................... 24

4.9 MODBUS parameter configuration ............................................................................................................... 24

4.9.1. DI Register List .................................................................................................................................. 24

4.9.2. List of AI Registers ............................................................................................................................ 25

4.9.3. List of DO Registers ...........................................................................................................................25

4.9.4. Module related registers .....................................................................................................................26

4.9.5. Network related registers ................................................................................................................... 27

4.9.6. Examples of Modbus command operation instructions .....................................................................28

V. Configuration Software ............................................................................................................................................31

5.1. Acquisition and Control ................................................................................................................................ 31

5.2. Parameter configuration interface .................................................................................................................32

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

I. Overview

1.1 Product Introduction

ME31-AAAX2240 is equipped with 4-way A-type relay output, 2-way

analog (0-20mA/4-20mA) input, 2-way dry contact input detection, 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;

2-way analog input (0-20mA/4-20mA);

2-way switch input DI (dry node);

4-way switch output DO (Type 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；

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

1.3 Product Application Topology Diagram

Network interface application topology diagram

Serial port application topology diagram

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

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-AAAX2240

12V switching power

supply

USB to RS485 Cable

A computer

A network cable

Several cables

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

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.

External power supply

ME31 Device

User’s RS485 Device

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

2.2.2 AI analog input connection

2.2.3. DI switch input connection

2.2.4. Relay output connection

Signal Generator/Sensor

Dry contact

Load

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

2.2.5 Simple use

Wiring: The computer is connected to the RS485 interface of ME31-AAAX2240 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-AAAX2240.

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

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

2.4 Control Testing

2.4.1 Modbus TCP control

Use the network assistant to control the first DO output of ME31-AAAX2240.

Other functions can be tested through the commands in the table below.

Function (function code)

Command

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

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

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 04 01 0F

Full close command (0x0F)

02 00 00 00 00 08 01 0F 00 00 00 04 01 00

Read all DI status (0x02)

01 00 00 00 00 06 01 02 00 00 00 02

Read all DO status (0x01)

01 00 00 00 00 06 01 01 00 00 00 04

2.4.2 Modbus RTU control

Use the serial port assistant to control the first DO output of ME31-AAAX2240.

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 04 01 0F 7E 92

Full close command (0x0F)

01 0F 00 00 00 04 01 00 3E 96

Read all DI status (0x02)

01 02 00 00 00 02 F9 CB

Read all DO status (0x01)

01 01 00 00 00 04 3D C9

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

III. Technical Specification

3.1 Specifications

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

Gateway address

192.168.3.1

DHCP

Native MAC

Determined by the chip (fixed)

Target IP

192.168.3.3

Target port

502

DNS server

114.114.114.114

Active upload

Serial parameters

Baud rate

9600bps (8 types)

Check method

None (default), Odd, Even

Data bit

Stop bit

MODBUS parameter

Modbus master-slave

Slave

Address

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

3.3 Mechanical Dimensional Drawing

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

3.4 Port and indicator light description

No.

Label

Illustrate

TX（LED）

Serial port send data indicator light

RX（LED）

Serial port receiving data indicator light

LINK（LED）

Network connection light

NET（LED）

Network data sending and receiving indicator light

PWR（LED）

Power input indicator

DO1（LED）

The first relay output indicator

DO2（LED）

The second relay output indicator

DO3（LED）

The third relay output indicator

DO4（LED）

The fourth relay output indicator

GND

Negative pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.

VCC

Positive pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.

NO1

Relay 1 normally open pin, used with relay 1 common terminal, 5.08mm

Phoenix terminal.

COM1

Common terminal of relay 1, used in conjunction with the normally open pin of

relay 1, 5.08mm Phoenix terminal.

NO2

Relay 2 normally open pin, used with relay 2 common terminal, 5.08mm

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

Phoenix terminal.

COM2

Common terminal of relay 2, used in conjunction with the normally open pin of

relay 2, 5.08mm Phoenix terminal.

NO3

Relay 3 normally open pin, used with relay 3 common terminal, 5.08mm

Phoenix terminal.

COM3

Common terminal of relay 3, used in conjunction with the normally open pin of

relay 3, 5.08mm Phoenix terminal.

NO4

Relay 4 normally open pin, used with relay 4 common terminal, 5.08mm

Phoenix terminal.

COM4

Relay 4 common terminal, used with relay 4 normally open pin, 5.08mm

Phoenix terminal.

Ethernet

Ethernet interface, standard RJ45 interface.

AI2

Analog input channel 2, supports 0 to 20mA current input, 5.08mm Phoenix

terminal.

AI1

Analog input channel 1, supports 0 to 20mA current input, 5.08mm Phoenix

terminal.

DI2

Digital input channel 2, supports dry contact access, 5.08mm Phoenix terminal.

DI1

Digital input channel 1, supports dry contact access, 5.08mm Phoenix terminal.

GND

Signal ground, 5.08mm Phoenix terminal.

485-A

The A of the serial port is connected to the A interface of the external device,

and the 5.08mm Phoenix terminal.

485-B

The B of the serial port is connected to the B interface of the external device,

and the 5.08mm Phoenix terminal.

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

IV. Product Function Introduction

4.1 DI Input

4.1.1. Switch Input DI Collection

The switch input DI measures level signals or edge pulse signals (rising edge, falling edge). Support dry

contact collection, support DI counting function, the maximum counting value is 65535 (the count exceeding 65535

is automatically cleared).

The switch input DI supports three trigger modes: rising edge, falling edge, and level (default rising edge

trigger).

The clearing method supports automatic clearing and manual clearing (default automatic clearing).

4.1.2. Input filtering

When the switch inputs DI to collect signals, it needs to maintain multiple sampling periods before confirming.

Filter parameters can be set in the range of 1 to 16 (default 6 sampling periods, 6*1kHz).

It can be configured with the host computer through instructions.

4.2 AI Input

4.2.1. Analog 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. The device adopts single-ended input, 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 3.5mA, it will be displayed as 0, and if it is higher than 3.5

mA and lower than 4mA, it will be displayed as 4. There is no conversion limit for signals greater than 20mA, but it

cannot exceed 25mA (there is a risk of equipment damage if it exceeds 25mA).

（2）The starting address of the AI channel sampling range parameter is 0x04B2, the register type is a

holding register, and the function codes are 0x06 and 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 Modbus does

not return error commands.

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

4.2.2. 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 triggering, as long as the AI value

is not lower than the set AI trigger low value, the current output value is always 1 (can be matched with DO

linkage).

（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 triggering, 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).

（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 triggering, as long as the AI

value is not lower than the set AI trigger low value, 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) , generating a

falling edge trigger. After triggering, 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).

4.2.3. Engineering quantity shaping 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 quantity shaping value, and directly convert to get the input current. The

starting address of the AI engineering quantity shaping value register is 0x0064, the register type is an 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 size is 0~25000 corresponding to 0~25mA. That is:

Current = engineering value / 1000 (mA)

（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 AI

engineering quantity shaping value register is 0x00C8, the register type is an input register, and the read function

code is 0x04. This method returns two registers representing 1 channel.

4.2.4. AI filter parameters

You can set the filter parameters of the AI channel, the effective value is 1-16, and the default value is 6.

Description of filter 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

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

automatically take the closest value and write it in. If the filter parameter is written as 0, the device will take 1 as

the filter parameter, and Modbus does not return error commands.

4.3 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.

4.3.1. 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.

4.3.2. 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.

4.3.3. 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).

4.3.4. 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

mode is turned on, the follow source should be configured at the same time, otherwise it will follow the first input

by default.

Chengdu Ebyte Electronic Technology Co.,Ltd. ME31-AAAX2240_UserManual_EN

4.3.5. 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.

4.3.6. 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.

4.3.7. 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.

4.4 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.

4.4.1. 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.

4.4.2. 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

address data.

Other manuals for ME31-AAAX2240

Table of contents

Other Ebyte I/O System manuals

Ebyte

Ebyte ME31-XAXA0404 User manual

Ebyte

Ebyte ME31-XAXX0600 User manual

Ebyte

Ebyte 4440-GPRS User manual

Ebyte

Ebyte ME31-XAAX0440 User manual

Ebyte

Ebyte ME31-AXXX8000 User manual

Popular I/O System manuals by other brands

Black Box

Black Box IC909C manual

Contec

Contec DIO-4/4(FIT)GY specification

LST

LST Input/Output Module 55000-875 Specifications

Siemens

Siemens SIMATIC ET 200M manual

WAGO

WAGO I/O System 750 XTR 750-495/040-010 manual

ICP DAS USA

ICP DAS USA PIO-DA4 user manual

Omron

Omron 3G3AX-MX2-EIO15-E instruction sheet

Allen-Bradley

Allen-Bradley 1794-IF4I user manual

Sony

Sony HSRA-11 quick start guide

SBS

SBS IP-OCTAL-422 user manual

INIM Electronics

INIM Electronics EM322AC quick start guide

HIMA

HIMA HIMax X-DO 32 01 manual

GMI

GMI D6040S instruction manual

Assa Abloy

Assa Abloy OneSystem uP N5951 Installation and mounting instructions

Bentel Security

Bentel Security FC410MIO manual

Unitronics

Unitronics V200-18-E4XB manual

Sony

Sony DVCAM DSBK-140 installation instructions

6TL

6TL YAV90304 Technical description

Ebyte ME31-AAAX2240 User manual

Popular I/O System manuals by other brands