SVD48V Series wheel hub motor servo controller user manual
10
4
4.1
RS232
and
RS485 communication protocol
4.1.1
read register
request packet
drive address
function
code
register address Number of
registers
CRC upper
8 bits
CRC lower 8
bits
0x01~0xFF
0x03
see register
definitions,
2 bytes
Number of
registers
xx
xx
reply packet
drive address
function
code
number of
bytes
data
CRC upper
8 bits
CRC lower 8
bits
0x01~0xFF
0x03
number of
bytes
high up
ahead,
low behind
xx
xx
error response packet
drive address
function
code
exception code
CRC upper 8 bits CRC lower 8
bits
0x01~0xFF
0x83
01 or 02 or 03, see exception
Answer Definition
xx
xx
4.1.2
write register
request packet
drive address
function
code
register address
data (2 bytes)
CRC upper
8 bits
CRC lower
8 bits
0x01~0xFF
0x06
see register
definition
2 bytes
High is first, low is
back
xx
xx
reply packet