Ebyte Me31-xaxx0600 User manual

ME31-XAXX0600

I/O Networking Module

Chengdu Ebyte Electronic Technology Co.,Ltd ME31-XAXX0600_UserManual_CN

Contents

1. Product overview ........................................................................................................................................................1

1.1 Introduction ...................................................................................................................................................... 1

1.2 Features .............................................................................................................................................................1

1.3 Application typology diagram ..........................................................................................................................2

2. Quick start ...................................................................................................................................................................3

2.1 Devices required ...............................................................................................................................................3

2.2 Device connection ............................................................................................................................................ 3

2.2.1 AI analog input connection ................................................................................................................... 4

2.2.2 Simple use ............................................................................................................................................. 4

2.3 Parameter configuration ................................................................................................................................... 4

2.4 Control test ....................................................................................................................................................... 5

2.4.1 Modbus TCP Control ............................................................................................................................ 5

2.4.2 Modbus RTU Control ............................................................................................................................6

3 Technical indicator ...................................................................................................................................................... 8

3.1Specification and parameter ..............................................................................................................................8

3.2 Device default parameter ................................................................................................................................. 8

3.3 Dimensions .....................................................................................................................................................10

3.4 Ports and indicators ........................................................................................................................................ 11

4 Product function introduction ....................................................................................................................................13

1.4 4.AI input ........................................................................................................................................................13

1.4.1. Analog quantity range ........................................................................................................................ 13

1.4.2. Trigger mode ...................................................................................................................................... 13

1.4.3. Analog input engineering quantity shaping value and engineering quantity floating point value ....14

1.4.4. AI Filtering parameters ...................................................................................................................... 14

4.2 Modbus gateway .............................................................................................................................................14

4.2.1 Modbus TCP/RTU Protocol Conversion ............................................................................................ 14

4.2.2 Modbus address filtering .....................................................................................................................15

4.2.3 Modbus TCP protocol data frame description .................................................................................... 15

4.2.4 Modbus RTU protocol data frame description ................................................................................... 15

4.3 Active upload ..................................................................................................................................................15

4.4Custom Module Information ...........................................................................................................................16

4.4.1 Modbus address ...................................................................................................................................16

4.4.2 Module name .......................................................................................................................................16

4.4.3 Network parameter ..............................................................................................................................16

4.4.4 UART parameter ................................................................................................................................. 17

4.5 OLED display and parameter configuration .................................................................................................. 17

4.5.1 Information display interface .............................................................................................................. 17

4.5.2 Device parameter display interface .....................................................................................................18

4.5.3 Device parameter configuration interface ...........................................................................................18

4.5.4 Screen sleep .........................................................................................................................................19

4.6MODBUS parameter setting ........................................................................................................................... 19

4.6.1 DI register list ......................................................................................................................................19

4.6.2 Module related register ....................................................................................................................... 20

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4.6.3 Network related register ......................................................................................................................20

4.6.4 Modbus command operation ...............................................................................................................21

5 Host computer ........................................................................................................................................................... 24

5.1 Acquisition and control .................................................................................................................................. 24

5.2 Parameter Configuration Interface .................................................................................................................25

Revision history ............................................................................................................................................................27

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1. Product overview

1.1 Introduction

ME31-XAXX0600 features 6 channel analog (0-20mA/4-20mA)

input,supports Modbus TCP protocol or Modbus RTU protocol for

acquisition and control and can be used as a simple Modbus gateway

(automatically send commands with non-local Modbus addresses through

the serial port/network port).

1.2 Features

Good for standard Modbus RTU protocol and MODBUS TCP protocol;

Work with various configuration software/PLC/touch screen；

RS485 acquisition control I/O；

RJ45 acquisition control I/O，support 4 channel master access；

Support OLED display screen to display status information, and device parameters can be configured through

buttons;

6 channel analog (0-20mA/4-20mA)input；

Support custom Modbus address settings；

Support 8 common baud rate configurations ；

DHCP and static IP；

DNS function, domain name analysis；

Support Modbus gateway；

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1.3 Application typology diagram

Network port application topology

Serial port application topology

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2. Quick start

Note: The test need to carry out with factory parameter.

2.1 Devices required

ME31-XAXX0600

12V SMPS

USB to RS485

Computer

RJ45 Cable

More cables

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

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original signal. Therefore, a terminal resistance must be added at the end of the transmission line to prevent the

signal from being reflected after reaching the end of the transmission line. The terminal resistance should be the

same as the impedance of the communication cable, with a typical value of 120 ohms. Its function is to match the

bus impedance and improve the anti-interference and reliability of data communication.

2.2.1 AI analog input connection

2.2.2 Simple use

Wiring: The computer is connected to the RS485 interface of ME31-XAXX0600 through USB to RS485, A is connected to A, 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 supply power to ME31-XAXX0600.

2.3 Parameter configuration

Step 1: Modify the IP address of the computer to be consistent with the device. Here it is modified to 192.168.3.100

to ensure the same network segment as the device and that the IP is different. Please turn off the firewall and try

again if the step failed;

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Step 2: Open the network assistant, select the TCP client, enter the remote host IP192.168.3.7 (default parameters),

enter the port number 502 (default parameters), and select HEX to send.

2.4 Control test

2.4.1 Modbus TCP Control

Use network assistant to read l ME31-XAXX0600, collected first channel AI data.

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Please note that unit of read value is uA.

To test other function according to below table

Function （function code）

Command

Read AI first channel

collected value（0x04）

00 1D 00 00 00 06 01 04 00 64 00

Read AI all collected value

（0x04）

00 1F 00 00 00 06 01 04 00 64 00

2.4.2 Modbus RTU Control

Use network assistant to readl ME31-XAXX0600, first channel AI collected data.

To test other function according to below table

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Function （function code）

Command

Read AI first channel

collected value（0x04）

01 02 04 00 64 00 00 08

79 CC01 70 15

Read AI all collected value

（0x04）

01 04 00 64 00 06 31 D7

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3 Technical indicator

3.1Specification and parameter

Category

Name

Parameter

Ethernet parameter

Working mode

TCP server （Max 4 channel client

access）

Local IP

192.168.3.7

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Local port

502

Subnet mask

255.255.255.0

Gateway address

192.168.3.1

DHCP

Off

Local MAC

Depending on chip（fixed）

Target IP

192.168.3.3

Target port

502

DNS server

114.114.114.114

Active upload

Off

UART parameter

Baud rate

9600bps（8 type）

Check method

None（default）、Odd、Even

Data bit

Stop bit

MODBUS parameter

Modbus master slave

Slave

Address

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3.3 Dimensions

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3.4 Ports and indicators

No.

Sticker

Remarks

TX（LED）

UART TX data

RX（LED）

UART RX data

LINK（LED）

Network link

NET（LED）

Network data TX and RX

PWR（LED）

Power input

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.

AI3

Analog input channel 3, supporting 0 to 20mA current input, 5.08mm Phoenix

terminal.

GND

Channel 3 analog input ground, 5.08mm Phoenix terminal.

AI4

Analog input channel 4, supporting 0 to 20mA current input, 5.08mm Phoenix

terminal.

GND

Channel 4 analog input ground, 5.08mm Phoenix terminal.

AI5

Analog input channel 5, supporting 0 to 20mA current input, 5.08mm Phoenix

terminal.

GND

Channel 5 analog input ground, 5.08mm Phoenix terminal.

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AI6

Analog input channel 6, supporting 0 to 20mA current input, 5.08mm Phoenix

terminal.

GND

Channel 6 analog input ground, 5.08mm Phoenix terminal.

Ethernet

Ethernet interface, standard RJ45 interface.

GND

Channel 2 analog input ground, 5.08mm Phoenix terminal.

AI2

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

terminal.

GND

Channel 1 analog input ground, 5.08mm Phoenix terminal.

AI1

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

terminal.

GND

RS485 GND

485-A

The serial port A is connected to the external device A interface, with a 5.08mm

Phoenix terminal.

485-B

The serial port B is connected to the external device B interface, with a 5.08mm

Phoenix terminal.

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4 Product function introduction

1.4 4.AI input

1.4.1. Analog quantity range

Analog input AI measurement current signal, with a collection range of 0-20mA or 4-20mA, an accuracy of

3‰, and a resolution of 12 bits. Adopting single ended input, sampling frequency 10Hz, input impedance 100 Ω.

Set the sampling range for all AI channels, with valid values of 1 and 0 (default 0).

Configuration is 0: represents 0-20mA

Configuration is 1: represents 4-20mA

[Note] AI Configuration Description

(1) The AI sampling range for each channel can be set. When the AI channel sampling range is configured to

4-20mA sampling, 0 is displayed if the current signal is below 3.5mA, and 4 is displayed if it is above 3.5mA and

below 4mA. There is no conversion limit for signals greater than 20mA, but it cannot exceed 25mA (exceeding

25mA may pose a risk of equipment damage).

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

written parameter value is not within the range of 0-1, the closest value will be automatically taken for writing. If

the writing sampling range parameter is 2, the device takes 1 as the sampling range parameter, and Modbus does

not return an error command.

1.4.2. Trigger mode

(1) Not triggered: mode off.

(2) Rising trigger: When the AI input value becomes greater than the set AI trigger high value, the AI trigger

becomes high (i.e. the output state is 1), generating a rising edge trigger. After triggering, as long as the AI value is

not lower than the set AI trigger low value, the current output value remains 1 (can be combined with DO linkage).

(3) Descending trigger: When the AI input value becomes less than the set AI trigger low value, the AI trigger

becomes low (i.e. 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 remains 0 (can be combined with DO

linkage).

(4) Bilateral trigger: When the AI input value becomes greater than the set AI trigger high value, the AI trigger

becomes high (i.e. the output state is 1), generating a rising edge trigger. After triggering, as long as the AI value is

not lower than the set AI trigger low value, the current output value remains 1; When the AI input value becomes

less than the set AI trigger low value, the AI trigger becomes low (i.e. 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 remains 0 (can be combined with DO linkage).

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1.4.3. Analog input engineering quantity shaping value and engineering quantity

floating point value

There are two ways to read the current signal size collected by the device:

(1) Read the AI engineering quantity shaping value and directly convert it to obtain the input current. The

starting address of the AI engineering quantity shaping value register is 0x0064, the register type is input register,

and the read function code is 0x04. This method returns a register representing one channel and reads values

ranging from 0 to 25000. The method for calculating the current size is 0-25000 corresponding to 0-25A. Namely:

Current=engineering quantity value/1000 (mA)

(2) Read the floating point value of AI engineering quantity, and use IEE754 conversion tool to convert

hexadecimal data to Floating-point arithmetic to get the input current. The starting address of the AI engineering

quantity shaping value register is 0x00C8, the register type is input register, and the read function code is 0x04.

This method returns two registers representing one channel.

1.4.4. AI Filtering parameters

The filtering parameters of the AI channel can be set, with valid values ranging from 1 to 16 and a default

value of 6.

Filter parameter description:

(1) All AI channels share a common filtering parameter, and the higher the parameter value, the more stable

the output value, and the slower the response.

(2) The AI channel filtering parameter address is 0x04B0, and the register type is a holding register. Function

codes 0x06 and 0x10.

(3) When writing AI filtering parameters, if the parameter values written are not within the range of 1-16, the

closest value will be automatically taken for writing. If the filtering parameter is written as 0, the device will take 1

as the filtering parameter, and Modbus will not return error instructions.

4.2 Modbus gateway

The device can transmit non local Modbus instructions from the network/serial port to the serial port/network,

and the local Modbus instructions can be executed directly.

4.2.1 Modbus TCP/RTU Protocol Conversion

After being turned on, the Modbus TCP data on the network side will be converted into Modbus RTU data.

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4.2.2 Modbus address filtering

This function can be used in certain host software or configuration screens as the host to access the device

serial port, and the gateway function of the device is used. When the slave is on the network side and the Modbus

TCP to RTU function is enabled, the presence of 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, data is transmitted through, and when the parameter is 1-255, data is only transmitted through the

set slave address.

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

N+2 Bit

1 Bit

N Bit

Transaction identification: 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 next data length, in bytes.

For example：get DI state

01 00

00 00

00 06

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 code CRC

1 Bit

N Bit

2 Bit

For example：get DI state command

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 fixed time intervals. Setting the value of

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the corresponding register can control the interval time and whether to upload or not.

The device with digital input will actively upload once after connecting to the server successfully, and then the

digital input will be uploaded following the status change, and the device with analog input will report the status of

the analog input according to the configuration of the active upload time period (the configuration period is

1-65535 ).

When set to 0, the upload is closed, and when set to another positive integer value N, the upload is performed

at intervals of N seconds.

[Note] The device can only be valid if it is in the client mode configuration. If the register value is non-zero,

active uploading is enabled.

4.4Custom Module Information

4.4.1 Modbus address

The default address of the device is 1, and the address can be modified. The address range is 1-247.

4.4.2 Module name

Users can configure the device name for differentiation according to their own needs. It supports English and

digital formats, and the maximum length is 20 bytes.

4.4.3 Network parameter

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: IP address of the device, 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)Target port: When the device works in client mode, the target port to which the device is connected.

(9)DNS server: When the device is in client mode, it resolves the server domain name.

(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, and 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 the secondary parameter is not 0 and the device is in the client mode, the discrete

input state of the device will be uploaded to the server after the initial connection or input changes, and the

analog input will be uploaded according to the configured time period.

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4.4.4 UART parameter

Parameters for setting serial communication:

Default parameters:

Baud rate: 9600(03);

Data bits: 8bit;

Stop bit: 1bit;

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(默认)

NONE

0x0001

ODD

0x0002

EVEN

4.5 OLED display and parameter configuration

The display interface includes information display page ( AI input status) and parameter setting page (part

of parameters).

4.5.1 Information display interface

Including the AI input value display page, shortly press the left and right buttons to switch the interface

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