Modbus RTU 4CH 12V RS485 module

Modbus RTU 4CH 12v RS485 module

Description:

4 channel relay output (one normally open and one normally closed)
STM8S103F3 MCU
4 channel optocoupler isolation
4 Relays Close LED Indicators
Round DC interface and terminal DC interface. Convenient power wiring (supply voltage 12V)
4 channel input interface
RS485 communication interface.
A power indicator
A User LED Lamp
Reset button

Package Included:
1 x Modbus RTU 4 channel Relay Module

Modbus RTU order:
 
Function code: 05 relay output[control relay ON/Off] 
Function code: 06 data storage[Customize data storage]
Baud rate: 9600 8 none1
 
16 system send
16 system receive
 
Operation steps: 
1.Software Setting Communication BPS
2.Set the address(Communications equipment used address,default is 01)
                                                          
/*******************************************************************/
Set the address：09
01 10 00 00 00 01 02 00 09 66 56//address 01 modified 09
Set the address：01
01 10 00 00 00 01 02 00 01 66 56// modified 01
 
 
read of address
00 03 00 00 00 01 85 db
return：
00 03 02 00 01 44 44 //01 is address
 
/*******************************************************************/
/*******************************************************************/
Each byte meaning：
[No.1 adress]
//--------------------------------------------
No.1 relay ON : 01 05 00 01 01 00 9d 9a
 
Byte 1：  Address
Byte 2：  Funtion code
Byte 3 4：Register address
Byte 5 6：Register data
Byte 7 8：CRC verify
 
//==============================================================
[No.1 adress]
//--------------------------------------------
No.0 relay ON : 01 05 00 00 FF 00 8C 3A
No.0 relay Off : 01 05 00 00 00 00 CD CA
//--------------------------------------------
No.0 relay ON : 01 05 00 01 FF 00 DD FA 
No.0 relay Off : 01 05 00 01 00 00 9C 0A 
//-------------------------------------------
No.2 relay ON : 01 05 00 02 FF 00 2D FA
No.2 relay Off : 01 05 00 02 00 00 6C 0A 
//-------------------------------------------
No.3 relay ON : 01 05 00 03 FF 00 7C 3A
No.3 relay Off : 01 05 00 03 00 00 3D CA
//-------------------------------------------
No.4 relay ON : 01 05 00 04 FF 00 CD FB
No.4 relay Off : 01 05 00 04 00 00 8C 0B
//--------------------------------------------
No.5 relay ON : 01 05 00 05 FF 00 9C 3B
No.0 relay Off : 01 05 00 05 00 00 DD CB 
//-------------------------------------------
No.6 relay ON : 01 05 00 06 FF 00 6C 3B
No.6 relay Off : 01 05 00 06 00 00 2D CB 
//-------------------------------------------
No.7 relay ON : 01 05 00 07 FF 00 3D FB
No.6 relay Off : 01 05 00 07 00 00 7C 0B
//-------------------------------------------
 
//=============================================================
All dark: 01 0F 00 00 00 08 01 00 FE 95
All bright: 01 0F 00 00 00 08 01 FF BE D5
 
/**********************************************************************/
 
/*********************************************************************/
read all ports input state
Send：01 02 00 00 00 08 79 CC   //read 8 input state
Return：01 02 01 00 A1 88