User Manual - CNC4PC

7-1-2 RS-232 Communication protocol and format
Baud rate 9600bps (Selection by Cn037.1 )
Parity
No
Data bit 8
Stop bit 1
※ Symbol H in folling sentence is for Hex representation.
(1) Read a word from servo drive Function code format: R5XxSs
Xx : A request to read register “ Xx ” from slave device( Unit :Byte, Hex representation)
Ss : Check Sum Ss =’R’+’5’+’X’+’x’ ( Unit :Byte、Hex representation)
Ex1: Read register address 30H and
( Convert『R530』into ASCII codes )
Check Sum=52H+35H+33H+30H=EA H
R 5 3 0
Obtain Function code for read register address 30H:『R530EA』
Servo drive response : %XxYySs
Ss is Check Sum, Ss=’%’+’X’+’x’+’Y’+’y’
Response message of example 1:
0008H is the data store in register address 30H:
Check Sum=25H+30H+30H+30H+38H=EDH
% 0 0 0 8
Drive response message:『%0008ED』
* When function code incorrect , drive response :『!』(ASCII code: 21H )
7-2