SPECIFICATIONS

8-way 220V AC detection module: MODBUS module RS485

Application: Computer

Brand Name: ReYeBu

Condition: New

High-concerned chemical: none

Origin: Mainland China

Package: SMD

Type: Voltage Regulator

is_customized: Yes

8-way 220V AC Detection Module MODBUS Module RS485 Communication Detection Mains Power Can Be Connected To PLC

New version update tips:

The new version has changed the protocol: the main changes are to change the MODBUS slave address and baud rate to 20000.

Avoid the problem of inability to communicate due to accidentally changing the wrong address and baud rate.

The new version of the protocol is more convenient and easy to use, and the function channel value starts from address 0, which is more intuitive and convenient!

In the future, products with the new version of the protocol will be shipped by default.

Product name: 8-way 220V optocoupler isolation module 485 communication

Version: V1.01

Product overview:

This product is a device for detecting the presence or absence of 220V voltage using RS485 communication. It has the function of converting the input 220V voltage into RS485 communication information and sending it to the host.

Power supply voltage: DC12-24V

Communication mode: RS485

Product protocol:

This product series supports MODBUS-RTU slave protocol

Factory default address: 1 can be modified (1-253) 255 is the broadcast address

Factory default baud rate: 9600 8 bits 1 stop bit no check

Wiring method: VCC connects to the positive pole GND connects to the negative pole, A connects to 485+ and B connects to 485-

Supported MODBUS function code: 0X03 read 0X06 write 0X10 write (others are not supported)

Communication protocol example: (read the status value of 8 channels)

Host sends: 01 03 00 00 00 08 44 0C (can be directly copied to the serial port assistant to test the module)

Module returns: 01 03 10 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 25 59

Reply analysis: The first 01 is the slave address, 0X03 is the function code, 0X10 indicates the number of valid bytes behind, 16 (red part)

The two bytes in the red part are the value of 1 register, a total of 8 registers, 16 bytes, 00 01 means that the first channel has input 220V

All the 00s behind it mean that the next 7 channels have no input, no 220V input, and the last 2 25 59 are CRC check codes

Modification method of MODBUS communication address (station number) and baud rate

Station number register 20000 (0X4E20) Baud rate register 20001 (0X4E21)

Sample code:

The host sends: 01 06 4E 20 00 03 DF 29

The slave returns: 01 06 4E 20 00 03 DF 29

This code changes the slave address (station number) of MODBUS to 3. It takes effect immediately after the change. You need to use the new address to communicate again.

The host sends: 01 06 4E 21 00 02 4F 29

The slave returns: 01 06 4E 21 00 02 4F 29

This code changes the communication baud rate of the slave to 2 (4800). After the change, you need to restart the slave (power off and then power on) to take effect. You need to use the same baud rate to communicate normally again.

product description:

Product size: with shell 115*90*40mm PCB board 86*91mm

This product is a module for digital output through RS485 communication.

It has the function of converting the presence or absence of 220V voltage into digital signal output.

Product agreement:

This product series supports MODBUS-RTU slave protocol

Factory default address: 1 can be modified (1-254) 255 is the broadcast address

Factory default baud rate: 9600, 8 bits, 1 stop bit, no parity

Wiring method: VCC is connected to the positive pole, GND is connected to the negative pole, A is connected to 485+, B is connected to 485-

Supported MODBUS function codes: 0X03 read 0X06 write 0X10 write (others are not supported)

Communication protocol example:

The host sends: 01 03 00 00 00 0A C5 CD (can be directly copied to the serial port assistant to test the module)

Module returns: 01 03 14 00 01 00 03 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 AF 6B

Reply analysis: the first 01 is the slave address, 0X03 is the function code

0X14 is the number of valid bytes behind 20 (red part)

The two bytes in the red part are the value of 1 register

00 01 is the device address,

00 03 is the communication baud rate means 9600

00 01 means that the first channel has 220V access

The following are all 0, which means that the following channels are not connected to 220V.

The last 2 (AF 6B) are CRC

The register point table is as follows: