TECO JSDG2S Series - Page 516

8-11
Communication Data Structure
ASCII Mode
Code Name Content Description
STX
Communication
Starts
3AH; Character ’:‘
ADR
Communication
Address
1-byte includes 2 ASCII Codes
For the communication address range is 1 ~ 254 must be
converted to hexadecimal first;
For example, the Driver ID is 20, hexadecimal is 14H,
ADR = ’1‘ , ‘4’ → ’1‘ = 31H , ‘0’ = 34H
CMD
Command
Instruction
1-byte includes 2 ASCII Codes
Common command instruction codes are as follows: ‘0’3;H
(Read Register), ‘0’6’H (Write Single Register), ‘0’’8’H
(Diagnostic Function), ‘1’’0’H (Write Multiple Registers)
DATA(n-1)
│
DATA(0)
Data Character
n-word = 2n-byte (consists of 4n ASCII Codes)
；
n≤30
Data Character Format is determined by the Command
Instruction Code
LRC Check Digit 1-byte includes 2 ASCII Codes
END 1 End Code 1 (CR)
0DH
；
Character ' \ r'
END 0 End Code 0 (LF)
0AH
；
Character ' \ n'
RTU Mode
Code Name Content Description
STX
Communication
Starts
More than 10ms of Quiescent Time
ADR
Communication
Address
1-byte
For the communication address range is 1 ~ 254 must be
converted to hexadecimal first;
For example, the Driver ID is 20, hexadecimal is 14H, and
ADR = ’14H’
CMD
Command
Instruction
1-byte
Common command instruction codes are as follows: 03H
(Read Register), 06H (Write Single Register), 08H
(Diagnostic Function), 10H (Write Multiple Registers)
DATA(n-1)
│
DATA(0)
Data Character
n-word = 2n-byte
；
n≤30
Data Character Format is determined by the Command
Instruction Code
CRC-Low
Check Digit - Least
Significant Bit
1-byte
CRC-High
Check Digit - Most
Significant Bit
1-byte
END 0 End Code 0 More than 10ms of Quiescent Time