1 Communication
WECON PLC
LX3V 串行通信
Supported series: WECON LX2V/ LX2E/ LX3V/LX3VP/LX3VE/LX3VM
HMI Settings
| Item | Settings | Note |
| Protocol | WECON LX2V/ LX2E/ LX3V/LX3VP/LX3VE/LX3VM | |
| Connection | RS422/RS485 | |
| Baud rate | 9600 | |
| Data bit | 7 | |
| Parity | EVEN | |
| Stop bit | 1 | |
| PLC station No. | 1 |
Address List
| Type | Device registers | HMI registers | Format | Range | Note |
| Bit | X | X | Xo | 0~303237 | |
| Y | Y | Y o | 0~303237 | ||
| M | M | M d | 0~99999 | ||
| T | T | T d | 0~99999 | ||
| C | C | C d | 0~99999 | ||
| S | S | S d | 0~99999 | ||
| Word | X | X | Xo | 0~303237 | |
| Y | Y | Y o | 0~303237 | ||
| M | M | M d | 0~99999 | ||
| T | T | T d | 0~99999 | ||
| C | C | C d | 0~199 | ||
| D | D | D d | 0~7999 | ||
| S | S | S d | 0~99999 | ||
| SD | SD | SD d | 8000~9999 |
Cable Wiring
- RS485
- RS422
✎Note:
- HMI COM3 is available in PI8000 series and COM3 is in COM2(hardware PIN 7 and PIN 8) .
- If PLC <= 20 points,such as LX3V-1208/LX3V-0806 PLC,PLC RS485A and RS485B mean PLC COM2 RS485+ and RS485- .PLC COM2 can support modbus. Please refer to PLC COM2 setting manual.
https://drive.google.com/drive/folders/13rgso7oUlatZQN_SNEcJCcN4toEdDPoP?usp=sharing
LX5V serial communication
This example introduces the establishment of serial port communication between Wecon V-BOX and LX5V. It is introduced through three parts: PLC software configuration, HMI software configuration, and hardware wiring.
Software configuration of PLC
1）PLC programming software
2）New PLC project
Click New Project and select the PLC model.
3）Set Serial port parameters
Follow the steps below to configure Serial port parameters
Baud rate：115200
Data bit：8
Stop bit：1
Parity：No verification
4）Registers list
V-BOX software configuration
1）V-BOX programming software
2）V-NET add device
Open V-NET client software → add device. As shown in the figure below, click "+" in the order of steps, and the Add Device window will pop up, enter the access key, password and remark, to add the device.
3）Set communication port parameters
Click the communication configuration button on the left to find the communication protocol with LX5V. After selecting the protocol, configure the communication parameters of the COM port.
Baud rate：115200
Data bit：8
Stop bit：1
Parity：No verification
hardware connection
1）Hardware wiring diagram
This example introduces WeconHMI with LX5V PLC to establish communication through serial port. The connection diagram is as follows:
The above are all the steps for establishing serial port communication between Wecon HMI with LX5V PLC.
LX5V-N Ethernet communication
This example introduces the establishment of Ethernet communication between Wecon HMI and LX5V. It is introduced through three parts: PLC software configuration, HMI software configuration, and hardware wiring.
Software configuration of PLC
1）PLC programming software
2）New PLC project
Click New Project and select the PLC model.
3）Set Ethernet port parameters
Follow the steps below to configure Ethernet parameters
PLC IP address：192.168.39.200
default gateway：192.168.39.1
subnet mask：255.255.255.0
4）Registers list
HMI software configuration
1）HMI programming software
2）New HMI project
Click New Project and select the HMI model.
3）Set communication port parameters
Click the project setting button on the left to configure the IP address of the HMI machine to ensure that the HMI and PLC IP remain in a local area network.
HMI IP address：192.168.39.201
default gateway：192.168.39.1
subnet mask：255.255.255.0
Next, click Communication Settings to configure the IP of the HMI communication object.
hardware connection
1）Hardware wiring diagram
This example introduces WeconHMI with LX5V-N PLC to establish communication through ethernet. The connection diagram is as follows:
The above are all the steps for establishing ethernet communication between Wecon HMI with LX5V PLC.
Rockwell PLC
MicroLogix
MicroLogix 1000/1100/1200/1400/1500; SLC 5/03 5/04 5/05 PLC-5
HMI Settings
| Item | Settings | Note |
| Protocol | Allen-Bradlley MicroLogix | |
| Connection | RS232 | |
| Baud rate | 19200 | |
| Data bit | 8 | |
| Parity | None | |
| Stop bit | 1 | |
| PLC station No. | 1 |
Address List
| Type | Device registers | Format | Range | Note |
| Bit | I | I d.d | 0.0~255.15 | |
| O | O d.d | 0.0~255.15 | ||
| B | B nnhh.dd | 0.0~ffff.15 | nn: block number (hex) | |
| S | S d.d | 0.0~255.15 | ||
| N | N nnhh.dd | 0.0~ffff.15 | nn: block number (hex) | |
| Word | S | S d | 0~255 | |
| TS | TS nnhh | 0~ffff | nn: block number (hex) | |
| TP | TP nnhh | 0~ffff | ||
| CS | CS nnhh | 0~ffff | ||
| CP | CP nnhh | 0~ffff | ||
| N | N nnhh | 0~ffff | ||
| C | C nnhh | 0~ffff | ||
| T | T nnhh | 0~ffff | ||
| R | R nnhh | 0~ffff |
Cable Wiring
CompactLogix
This example introduces the establishment of Ethernet communication between Wecon V-box and CompactLogix L1769. It is introduced through three parts: PLC software configuration, V-box software configuration, and hardware wiring.
Software configuration of PLC
1）PLC programming software
2）New PLC project
Click New Project and select the PLC model.
3）Set Ethernet parameters
Follow the steps below to configure Ethernet parameters
PLC IP address：192.168.40.101
default gateway：192.168.40.1
subnet mask：255.255.255.0
V-box software configuration
1）V-box programming software
2）Configure device network
Click the Configuration Download button
, It is used to configure the device network, update the device time, obtain the device machine code, check the device network, etc.
In the example below, the IP address of V-Box is configured as 192.168.40.66, and the networking method is 4G connection
3）V-net add device
Open VNET client software → add device. As shown in the figure below, click "+" in the order of steps, and the Add Device window will pop up, enter the device machine code/product code, device password, and device alias to add the device. 
4）Set communication port parameters
In the device list on the left, find the Vbox that communicates with the L1769, click it and select configuration,communication port configuration in the main interface to add a communication protocol.
The communication port is selected as Ethernet, the device type is selected as Allen-Bradley, the protocol is Allen-BradleyMicro850_FreeTag EthemetIP, and the IP is the internal IP address of the L1769 PLC. The port number is 44818.
After adding the protocol Allen-BradleyMicro850_FreeTag, click
icon add label.
5）Engineering production
According to your own needs, use the V-NET client software to edit the required data monitoring points.
hardware connection
1）Hardware wiring diagram
This example introduces Wecon V-box with Allen-Bradley L1769 PLC to establish communication through Ethernet. The connection diagram is as follows:
The above are all the steps for establishing Ethernet communication between Wecon V-box with CompactLogix L1769 PLC.
Allen-Bradley Ethernet DF1
Siemens PLC
Siemens S7-1200
Communication with S7-200 Smart
Delta PLC
Delta DVP Ethernet
Delta DVP Serial Protocol
Mitsubishi PLC
Communicate with Mitsubishi FX Series
Omron PLC
Omron CP1 Series
Omron CJ2M
Modbus RTU
V-BOX as master
Select the protocol “Modbus RTU Slave(All Fuction)”,
then set BaudRate,Port,Stop Bit,Data Bit,Parity
V-BOX as slave
Select the protocol “Modbus RTU Master”,
then set BaudRate,Port,Stop Bit,Data Bit,Parity
Address List
| Type | Register | Function code & Description |
| Word | 3 | 04 (read input register: read current binary value in one or more input registers) |
| 06 (write single register: write a binary value to a holding register) | ||
| 10 (write values to multiple addresses ) | ||
| 4 | 03 (read holding register: read current binary value in one or more holding registers) | |
| 06 (write single register: write a binary value to a holding register) | ||
| 10 (write values to multiple addresses ) | ||
| W6 | 03 (read holding register: read current binary value in one or more holding registers) | |
| 06 (write single register: write a binary value to a holding register) | ||
| 10 (write values to multiple addresses ) | ||
| W16 | 03 (read holding register: read current binary value in one or more holding registers) | |
| 10 (write values to multiple addresses ) | ||
| Bit | 0 | 01 (Read coil state) |
| 05 (Force a single coil to force the on/off state of a logic coil) | ||
| 0F (Write multiple bits, ie write continuously) | ||
| 1 | 02 (Read the input state) | |
| 05 (Force a single coil to force the on/off state of a logic coil) | ||
| 0F (Write multiple bits) | ||
| W5 | 01 (Read coil state to obtain the current state of a set of logic coils) | |
| 05 (Force a single coil to force the on/off state of a logic coil) | ||
| 0F (Write multiple bits) | ||
| W15 | 01 (Read coil state to obtain the current state of a set of logic coils) | |
| 0F (Write multiple bits) |
Communicate with VB inverter
User define protocol
More serial port script instruction,please refer manual:Lua script function--->3.Serial port operation
Read the temperature sensor.
the commond format is as beliow:
Send commond:01 03 02 00 00 03 04 73
Feedback commond:01 03 06 07 F7 0E 7E B7 35
Temperature data:07 F7,desimal = 2039,it means temperature is 20.39℃.
Humidity data:0E 7E,desimal = 3710, it mean humidity is 37.10%RH.
Script Demo:
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function com.main()
--dosomething
openPlc()
end
function openPlc()
if obj then
-- If the serial port opened,then read/write data by timing
local wri = string.pack(">HHHH",0X0103,0X0200,0X0003,0X0473)
local arr = reading(wri)
-- if arr ~=nil then
-- if arr[1] ==33 and arr[2] ==v[2][2] and arr[3] ==v[2][3] then
-- local A = arr[4]*256
-- local B = A+arr[5]
-- addr_setword(v[1],B)
-- end
-- end
else
--judge if there is a serial object, then initialize and open the serial port
local configs = {
name = 'COM1', --Select serial port COM1
mode = 485, --Communication mode RS485
baud_rate = 9600, --Baud rate 9600
stop_bit = 1, --stop bit 1
data_len = 8, --data length 8
check_bit = 'NONE', --no parity
}
obj,err = serial.open(configs) --Open serial port
if not obj then
print("serial open :failed", err) -- Open serial port failed
end
end
end
function reading(wri)
obj:flush() -- Clear serial port
obj:write(wri) -- Write serial port
print(string.byte(wri,1,#wri))
obj:flush() -- Clear serial port
local readed =obj:read(9,1000) -- Read 9 bytes, timeout 1 second
if readed and readed ~= "" then
-- judge that a non-empty string is read
print(string.byte(readed,1,#readed))
a={string.byte(readed, 1, #readed)}
if nil ~= a[4] and nil ~= a[5] and nil ~= a[6] and nil ~= a[7] then
a1=a[4]*256+a[5]
a2=a[6]*256+a[7]
addr_setword("@HDW0",a1)
addr_setword("@HDW1",a2)
end
return {string.byte(readed, 1, #readed)}
elseif readed == nil then
print("serial read err:", err or "")
return nil
end
return nil
end
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