SD710 Series Servo Drive User Manal Chapter 11 Communication
4
At this time, the content of CRC register is the CRC error detection value.
Note
: After calculating the CRC error value, the low bit of CRC must be filled at first in the command message, and then
the high bit of CRC is filled.
For example, 2 words (word) are read from address 0004H of servo driver with station number 01H. The last content of
the CRC register calculated from Address to the last byte of the data number is CA85H, then the command message is
shown below, and it should be noted that 85H is transmitted before CAH.
Table 11-5 CRC Check Code Calculation
Command Meaning
Command content
Address
01H
Command
03H
Start data address
00H (high byte)
04H (low byte)
Number of data
(in word)
00H
02H
CRC check (low)
85H
CRC check (high)
CAH
(8) Error message
The driver replies with the corresponding error code to the master when a command error, function code address
exception, and CRC check error are sent from the master.
11.1.2 Communication-related settings
(1) Related function codes
Function
code
Name
Setting range
Default
Pn080
Local communication
address
1 to 255
1
Pn081.
RS485 communication
baud rate
0: 4800bps
1: 9600bps
2: 19200bps
3: 38400bps
4: 57600bps
5: 115200bps
2
Pn081.Y
RS485 communication
check method
0: no parity, 8 bits of data, 1 stop bit (N, 8, 1)
1: Even parity, 8 bits of data, 1 stop bit (E, 8, 1)
2: Odd parity, 8 bits of data, 1 stop bit (O, 8, 1)
3: No parity, 8-bit data, 2 stop bits (N, 8, 2)
4: Even parity, 8-bit data, 2 stop bits (E, 8, 2)
5: Odd parity, 8-bit data, 2 stop bits (O, 8, 2)
0
