Estun ETS-101010APC-CAN - Page 106

ETS Series AC Servo User's Manual
- 105 -
Start
bit
0 1 2 3 4 5 6
Stop
bit
8-data bits
11- bits character frame
8，N，2（Modbus，ASCII / RTU）
Stop
bit
7
Start
bit
0 1 2 3 4 5 6
Even
parity
8-data bits
11- bits character frame
8，E，1（Modbus，ASCII / RTU）
Stop
bit
7
Start
bit
0 1 2 3 4 5 6
Odd
parity
8-data bits
11- bits character frame
8，O，1（Modbus，ASCII / RTU）
Stop
bit
7
Communication protocol structure：
Data format of communication protocol：
ASCII Mode：
STX
Start character‘：’＝＞(3A
H
)
ADR
Communication address＝＞1-byte contains two ASCII codes
CMD
Reference code＝＞1-byte contains two ASCII codes
DATA(n-1)
Data content＝＞n-word=2n-byte contain 4nASCII codes，n≦12
……
DATA(0)
LRC
Checking code＝＞1-byte contains two ASCII codes
End 1
End code 1＝＞（0D
H
）（ CR）
End 0
End code 0＝＞（0A
H
）（ LF）
RTU Mode：
STX
Sleep interval of at least 4 bytes transmission time.
ADR
Communication address＝＞1-byte
CMD
Reference code＝＞1-byte
DATA(n-1)
Data content＝＞n-word=2n-byte，n≦12
……
DATA(0)
CRC
CRC checking code＝＞1-byte
End 1
Sleep interval of at least 4 bytes transmission time.
Communication protocol data format instructions are as follows：
STX（communication start）
ASCII mode：‘: ’character
RTU mode: Sleep interval of at least 4 bytes transmission time (automatically changed according to different