Write A Single Hold Register; Write Multiple Hold Registers; Write A Single Do Coil Status - Ebyte 8DO User Manual

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Device Modbus The function
address
The above 00 00 indicates that DO1 is level mode.

7.2.3 Write a single hold register

Write a single hold register using the 06 function code, for example, set the operating mode of DO1 to pulse mode
20
Device Modbus The function
address
When the above command is sent to the device via the 485 bus, the device returns the following values:
20
Device Modbus The function
address
If the modification is successful, the 0x0578 register data is 0x0001.

7.2.4 Write multiple hold registers

Write multiple hold register commands using 10 function codes, for example, set the do1-DO4 operating mode at the
sametime.
20
Device Modbus The function
address
When the above command is sent to the device via the 485 bus, the device returns the following values:
20
Device Modbus The function
address
If the modification is successful, the values of thefour consecutive registers with 0x 0578 as the starting address are
x0001, 0x0002, 0x0003, 0x0000.

7.2.5 Write a single DO coil status

Use the 05 command to write a single command, for example, to set do1 to pulse mode
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The number of bytes of the
code data
06 05 78
Register address
code
06 05 78
Register address
code
10 05 78
Register
code start address
10 05 78
Register
code address
【8DO】MA01 -XXCX0080 User Manual
The data returned
00 01
Write the value
00 01
Write the value
00 04 08
The number
The number of bytes
of registers written to
the data
00 04
The number of registers
CRC check code
XX XX
CRC check code
XX XX
CRC check code
0001 0002 XX XX
The data CRC check
written code
XX XX
CRC check
code
0
32