Ebyte ME31-XAXX0600, Руководство пользователя

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The above returned status data 01 indicates that the output DO1 is turned on.
2. Control coil (DO) status
Support operation of single coil (05), operation of multiple coils (0F) function code operation. Use the 05 command
to write a single command, for example:
01 05 00 00 FF 00 8C 3A
Modbus address Function code Register first address
On
：
FF 00
Off
：
00 00
CRC check code
After sending the above command to the device through the 485 bus, the device will return the following values:
01 05 00 00 FF 00 8C 3A
Modbus address Function code Register first address Operation method CRC check code
DO1 coil conduction
Use the 0F function code as the command to write multiple coils, for example:
01 0F 00 00 00 04 01 0F 7E 92
Modbus
address
Function
code
Starting
address
Coil number
Number of
bytes of data
Data of control
coil
CRC check
code
After the above command is sent to the device through the 485 bus, the device will return the following values
01 0F 00 00 OO O4 54 08
Modbus address Function code Register address Coil number CRC check code
All coils are conducted.
3. Read Holding register
Use the 03 function code to read one or more register values, for example:
01 03 05 78 00 01 04 DF
Modbus address Function code
Register first
address
Quantity of register read CRC check code
After the above command is sent to the device through the 485 bus, the device will return the following values: