Do not provide source communication MODBUS code
MODBUS RTU communication instruction:
Modbus RTU instruction
Baud rate: 96008 NONE 1
The relay module can have multiple network communication, and the communication address can be set by serial port instruction. (communication instructions provided by SkyDrive)
Relay module factory default communication address fixed to 1, serial assistant operation instructions:
Note: the following specific test instructions are passed through the network
Instruction function:
- set address to 2. read address 3. read software version 4. read the hardware version
Output instructions:
MODBUS-RTU communication instructions:
Function code: 05 is relay output [control relay on / off].
Function code: 06 is to store data [user defined storage data, user defined data, address number, set by the user himself. Generally, it is a useless state.]
Baud rate: 96008 None 1
16 Decimal transmission
16 Decimal receiver
Operation steps:
-
software set communication baud rate
-
set the address (the address of the device used for communication, the default address is 01).
The set address is: 01
000640000001 5C 1B
The set address is: 02
000640000002 1C 1A
Read address
00034000000190 1B
000640020000 3C 1B
000640020001 FC 4B
Read address
00030000000185 DB
Return：
00030200014444 //01 is the address
The meaning of the representative of each byte:
[1 address]
/ / - to - - to - - ---
Relay No. 1: 010500010100 9D 9A
Byte 1: Address
Byte 2: function
Byte 34: register address
Byte 56: register data
Byte 7 8:CRC check
/ / = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
[1 address]
/ / - to - - to - - ---
Relay No. 0: 01050000 FF 00 8C 3A
No. 0 relay closes: 010500000000 CD CA
/ / - to - - to - - ---
Relay No. 1: 01050001 FF 00 DD FA
No. 1 relay closes: 010500010000 9C 0A
/ / - to - -- - ----
Relay No. 2: 01050002 FF 00 2D FA
No. 2 relay closes: 010500020000 6C 0A
/ / - to - -- - ----
Relay No. 3: 01050003 FF 00 7C 3A
No. 3 relay closes: 010500030000 3D CA
/ / = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
Read all interface input states
Send: 01020000000879 CC / / read 8 input states
Return: 01020100 A1 88
All out
Read instructions:
Read the 1 channel state [IN1] 2 channel state [IN2] 3 channel state [IN3] 4 channel state [IN4]
Read all input interface states
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Serial assistant operation structions:
Below are the test instructions for device number 1:
No. 1 relay close:
01 06 00 01 01 00 d9 9a
No. 1 relay open:
01 06 00 01 01 01 18 5a
No. 2 relay close:
01 06 00 01 02 00 d9 6a
No. 1 relay open:
01 06 00 01 02 01 18 aa
No. 3 relay close:
01 06 00 01 03 00 d8 fa
No. 1 relay open:
01 06 00 01 03 01 19 3a
No. 4 relay close:
01 06 00 01 04 00 da ca
No. 1 relay open:
01 06 00 01 04 01 1b 0a
All put out:
01 06 00 01 00 00 d8 0a
All light:
01 06 00 01 ff ff d9 ba