EBYTE ME31-XXXA0006 Network I-O Networking Module User Manual

Contents hide

1 EBYTE ME31-XXXA0006 Network I-O Networking Module

2 Overview

3 Quick use

4 Technical Specification

5 Product Function Introduction

6 Configuration Software

7 About us

8 FAQ

9 Documents / Resources

9.1 References

10 Related Posts

EBYTE ME31-XXXA0006 Network I-O Networking Module

Overview

Product Introduction
ME31-XXXA0006 is a network I/O networking module with 6 analog outputs (0-20mA/4-20mA) and supports Modbus TCP protocol or Modbus RTU protocol for acquisition and control. The device can also be used as a simple Modbus gateway (automatically send commands with non-local Modbus addresses through the serial port/network port).

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 analog outputs (0-20mA/4-20mA)；

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;

Product Application Topology Diagram

Quick use

Note】 This test needs to be carried out with the default factory parameters.

Device preparation
The following table lists the items required for this test Device connection

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.

AO analog output connection

Simple use Wiring: The computer is connected to the RS485 interface of ME31-XXXA0006 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-XXXA0006.

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.

Control Testing

Modbus TCP control
Use the network assistant to control the first AO output of ME31-XXXA0006 to 10mA. Other functions can be tested through the commands in the table below.

Function (function code)	Command
Control AO1 output 10mA (0x10)	01 00 00 00 00 0B 01 10 00 00 00 02 04 41 20 00 00
Read AO1 output (0x03)	01 00 00 00 00 06 01 03 00 00 00 02

Modbus RTU control
Use the serial port assistant to read the current AO1 output of ME31-XXXA0006.

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

Function (function code)	Command
Read current AO1 output (0x03)	01 03 00 00 00 02 C4 0B
Control AO1 current output 10mA (0x10)	01 10 00 00 00 02 04 41 20 00 00 E6 59

Technical Specification

Specifications

Category	Name	Parameters
Power supply	Operating Voltage	DC8～28V
Power supply	Power indicator	Blue LED indication
Serial port	CommunicationInterface	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
AO output	Number of AO channels	6 way
	AO output type	Current output, 2-wire connection
	AO output range	0～20mA \4～20mA
	AO resolution	16 bits
	Output accuracy	3‰
	Output indication	OLED screen display
Other	Product Size	121mm * 72mm * 34mm (LWH)
	Product weight	135 ±5 g
	Working temperature and humidity	-40 ～ +85℃, 5% ～ 95%RH (nocondensation)
	Storage temperature and humidity	-40 ～ +105℃, 5% ～ 95%RH (nocondensation)
	Installation method	Din-rail installation

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
	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
MODBUS parameter	Address	1

Mechanical Dimensional Drawing

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	GND	Negative pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.
7	VCC	Positive pole of power input terminal, DC 8V~28V, 5.08mm Phoenix terminal.
8	AO3	Analog output current (positive pole), channel 3, 5.08mm Phoenix terminal.
9	AGND	Analog output current (negative pole), channel 3, 5.08mm Phoenix terminal.
10	AO4	Analog output current (positive pole), channel 4, 5.08mm Phoenix terminal.
11	AGND	Analog output current (negative pole), channel 4, 5.08mm Phoenix terminal.
12	AO5	Analog output current (positive pole), channel 5, 5.08mm Phoenix terminal.
13	AGND	Analog output current (negative pole), channel 5, 5.08mm Phoenix terminal.
14	AO6	Analog output current (positive pole), channel 6, 5.08mm Phoenix terminal.
15	AGND	Analog output current (negative pole), channel 6, 5.08mm Phoenix terminal.
16	Ethernet	Ethernet interface, standard RJ45 interface.
17	AGND	Analog output current (negative pole), channel 2, 5.08mm Phoenix terminal.

18	AO2	Analog output current (positive pole), channel 2, 5.08mm Phoenix terminal.
19	AGND	Analog output current (negative pole), channel 1, 5.08mm Phoenix terminal.
20	AO1	Analog output current (positive pole), channel 1, 5.08mm Phoenix terminal.
21	GND	Signal ground, 5.08mm Phoenix terminal.
22	485-A	The A of the serial port is connected to the A interface of the external device, and the 5.08mm Phoenix terminal.
23	485-B	The B of the serial port is connected to the B interface of the external device, and the 5.08mm Phoenix terminal.

Product Function Introduction

AO output

AO output range
Analog output (AO), the current output type can be configured as 0~20mA or 4~20mA, the precision is 3‰, and the resolution is 16 bits.
The power-on default output value can be set (when the working mode is switched, the power-on value will be output according to the lowest value of the current range).

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.

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.

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.

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

Modbus RTU protocol data frame description

RTU frame format：

Device address	Function code	Data segment	Check code CRC
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

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.

Custom Module Information

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

Module Name
Users can configure the device name according to their own needs to distinguish, support English, digital format, up to 20 bytes.

Network parameters
Unless otherwise specified: the following network-related parameters default to IPV4-related parameters.

MAC of the device: the user can obtain it by reading the specified register, and this parameter cannot be written.
IP address: device IP address, readable and writable.
Modbus TCP port: the port number of the device, readable and writable.

Subnet mask: address mask, readable and writable.
Gateway address: gateway.
DHCP: Set the way the device obtains IP: static (0), dynamic (1).

Target IP: When the device works in client mode, the target IP or domain name of the device connection.
Destination port: When the device is working in client mode, the destination port of the device connection.
DNS server: The device is in the client mode and resolves the domain name of the server.

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.
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.

Serial Port Parameters
Parameters for setting serial communication:

Default parameters:

Baud rate: 9600 (03);
Data bit: 8bit;

Stop bit: 1bit;
Check digit: NONE(00);

Baud rate：

Baud rate code value table
0x0000	1200
0x0001	2400
0x0002	4800
0x0003（default）	9600
0x0004	19200
0x0005	38400
0x0006	57600
0x0007	115200

Check Digit：

Check Digit
0x0000(default)	NONE
0x0001	ODD
0x0002	EVEN

OLED display and parameter configuration
The display interface includes an information display page (DO status display page) and a parameter setting page (partial parameters).

Information Display Interface
Including the DO status display page, short press the up and down buttons to switch the interface.

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:

Modbus address;

Baud rate;
Data bits;
Check Digit;

Stop bit;
Local port;
Local IP address;

Network mode;
Gateway; Subnet mask;
DNS;

MAC address;
DHCP;
Target IP;

Destination port;
Modbus TCP/RTU protocol conversion;
Active upload;

Modbus address filtering;；

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;

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.

MODBUS parameter configuration
Note: According to the usage requirements, some software (such as KingView) requires adding +1 when converting from hexadecimal to decimal in order to operate on registers (all decimal values in the table have already been adjusted by +1).

AO Register List

Register function	Register address(HEX)	Register address(DEC)	Register type	Number	Operate	Data Range/Remarks	Related function code
Analogoutput value	0x0000	4-0001	Holding register	12	RW	32-bit floating point type, unit mA	R：0x03 W：0x10
Analog outputvalue	0x0064	4-0101	Holding register	6	RW	Analog channel output quantity, 2-byte integer, unit (uA)	R：0x03 W：0x10
AO output mode	0x0514	4-1301	Holding register	6	RW	AO channel output range 0x0000: 0~20mA0x0001: 4-20mA	R：0x03 W：0x06、0x10
AO power- on output initial value	0x00C8	4-0201	Holding register	12	RW	Output engineering quantity when the analog channel is powered on, a 4-byte floatingpoint number, the default is 0	R 0x03 W 0x10

Module related registers

Register function	Register address (HEX)	Register address (DEC)	Register type	Number	Operate	Data Range/Remarks	Related function code
Moduleaddress	0x07E8	4-2025	Holdingregister	1	RW	Modbus address,1～247 configurable addresses	R：0x03W：0x06
Modulemodel	0x07D0	4-2001	Holdingregister	12	R	Get the current model	R：0x03
Firmwareversion	0x07DC	4-2013	Holdingregister	1	R	Get firmware version number	R：0x03
Modulename	0x07DE	4-2015	Holdingregister	10	RW	Custom module name	R：0x03W：0x10
Modulerestart	0x07EA	4-2027	Holdingregister	1	W	Write 0x5BB5 to reboot.	W：0x06
Restore factoryparameters	0x07E9	4-2026	Holding register	1	W	Write 0x5BB5 to restore factory settings.	W：0x06
Serialbaud rate	0x0834	4-2101	Holdingregister	1	RW	See baud rate code table,Default is 9600 (0x0003)	R：0x03W：0x06、0x10
Serial checkdigit	0x0836	4-2103	Holding register	1	RW	0x0000 no checksum (default) 0x0001 odd parity0x0002 even parity	R：0x03 W：0x06、0x10

Network related registers

Register function	Register address(HEX)	Register address(DEC)	Register type	Number	Operate	Data Range/Remarks	Related function code
Module MACaddress	0x0898	4-2201	Holding register	3	R	Device MAC parameters	R：0x03
Local IPaddress	0x089B	4-2204	Holdingregister	2	RW	Default: 192.168.3.7	R：0x03W：0x06、0x10
local port	0x089D	4-2206	Holdingregister	1	RW	1～65535, default: 502	R：0x03W：0x06、0x10
Subnet maskaddress	0x089E	4-2207	Holding register	2	RW	Default: 255.255.255.0	R：0x03 W：0x06、0x10
Gatewayaddress	0x08A0	4-2209	Holdingregister	2	RW	Default: 192.168.3.1	R：0x03W：0x06、0x10

DHCP mode setting	0x08A2	4-2211	Holding register	1	RW	0x0000 static IP (default) 0x0001 Obtain IP automatically	R：0x03 W：0x06、0x10
Target IP/domain name	0x08A3	4-2212	Holding register	64	RW	String format stored in IP/domain name Default IP: 192.168.3.3	R：0x03 W：0x06、0x10
Server port	0x08E3	4-2276	Holdingregister	1	RW	0-65535, default 502	R：0x03W：0x06、0x10
DNS server IP address	0x08E4	4-2277	Holding register	2	RW	Default 8.8.8.8	R：0x03 W：0x06、0x10
Modulework mode	0x08E6	4-2279	Holdingregister	1	RW	0x0000 server mode0x0001 client mode	R：0x03W：0x06、0x10
Activeupload	0x08E7	4-2280	Holdingregister	1	RW	0x0000 disabled, others:1～65535s cycle sending	R：0x03W：0x06、0x10
MOSBUS TCP/RTUconversionenable	0x08E8	4-2281	Holding register	1	RW	0, close, 1 open protocol conversion	R：0x03 W：0x06、0x10
MODBUS address filtering	0x08E9	4-2282	Holding register	1	RW	0: transparent transmission, 1-255: when the data is not local, check the slave address of the command , and it can be passed when it is theset value	R：0x03 W：0x06、0x10

Examples of Modbus command operation instructions

Read coil (DO) status Use the read coil state (01) function code to read the output coil state, for example

01	01	00 00	00 04	3D C9
Modbus address	Function code	Register first address	Number of output coils read	CRC check code