11-Bit Character Frame (For 8-Bit Character); Rtu Mode - Delta Electronics AC Servo Drive ASDA-AB User Manual

Chapter 8 MODBUS Communications|ASDA-AB Series

11-bit character frame (For 8-bit character)

8N2
Start
bit
8E1
Start
bit
8O1
Start
bit
Communication Protocol:
ASCII Mode:
STX
ADR
CMD
DATA(n-1)
.......
DATA(0)
LRC
End 1
End 0

RTU Mode:

STX
ADR
CMD
DATA(n-1)
.......
DATA(0)
CRC
End 1
8-10
0 1
2
8-data bits
11-bits character frame
0 1
2
8-data bits
11-bits character frame
0 1 2
8-data bits
11-bits character frame
Start character': ' (3AH)
Communication address: 1-byte consists of 2 ASCII codes
Command code: 1-byte consists of 2 ASCII codes
Contents of data: n word = n x 2-byte consists of n x 4 ASCII codes, n≤12
Command code: 1-byte consists of 2 ASCII codes
End code 1: (0DH)(CR)
End code 0: (0AH)(LF)
A silent interval of more than 10ms
Communication address: 1-byte
Command code: 1-byte
Contents of data: n word = n x 2-byte, n≤12
Command code: 1-byte
A silent interval of more than 10ms
3 4 5
3 4 5
3 4 5
Stop
6
7
bit
Even
6
7
parity
Odd
6
7
parity
Revision January 2009
Stop
bit
Stop
bit
Stop
bit