95
Modbus
（
RTU
）
Protocol
command set
Number of write
registers
0001~0068
（
104
）
The number of registers read continuously. Please
refer to the Modbus command set to ensure that
these register addresses arevalid, otherwise an error
frame will be returned.
Number of bytes
= number of registers x 2
CRC-16
Data
Figure 11-8
Write to Multiple Registers
（
0x03
）
Response Frame
Name
Name
Description
Station address
Returned as it was.
0x10
Or 0x90
Function code
No abnormality: 0x10
Error code: 0x90
Starting address
Number of write
registers
0001~0068
（
104
）
CRC-16 Check code
11.6
Echo Test
echo test function code 0x08, used for debug Modbus
。
Figure 11-9
echo test
（
0x08
）
Name
Name
Description
Station address
Returned as it was.
0x08
Function code
Fixed value
00 00