Chapter 6 Modbus RTU protocol
56
Slave
address
function
initial address
Numbers of data
Error
check(CRC16)
High
Low
High
Low
Low
High
11 H
03 H
00 H
00 H
00 H
02 H
** H
** H
If the values from the side 400001 (0000H) ~ 400002 (0001H) are "555 (22B H)" and "100
(64 H)" respectively.
answer(salve side)
Slave
addres
s
functio
n
Numbe
r of
bytes
data
data
Error
check(CRC16)
High
Low
High
Low
Low
High
11 H
03 H
04 H
02 H
2B H
00 H
64 H
** H
** H
