User Manual of SY5000 series AC Drive MODBUS communication protocol
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3.4 Function code
(
Function
)
03H
：
Reading register contents
06H
：
Writing a WORD to register
08H
：
Loop detection
3.5 Example of reading data command
:
a) ASCII mode
：
Command message:
STX
‘:’
Address
‘0’
‘1’
Function
‘0’
‘3’
DATA
Starting address
‘2’
‘1’
‘0’
‘2’
Number of data(count
by word)
‘0’
‘0’
‘0’
‘2’
LRC Check
‘D’
‘7’
END
CR
LF
Response message:
STX
‘:’
Address
‘0’
‘1’
Function
‘0’
‘3’
