Delta VFD11AMS21AFSHA, User Manual

Page: 264 / 445

Chapter 12 Description of Parameter Settings

MS300
(High Speed Model)
12-09-3
(7, O, 1)
Odd
parity Start
bit
0 1 2 3 4 5 6
Stop
bit
7-data bits
10-bits character frame
11-bit character frame (For RTU):
(8, N, 2)
Start
bit
0 1 2 3 4 5 6
Stop
bit
8-data bits
11-bits character frame
Stop
bit
7
(8, E, 1)
Start
bit
0
1 2
3 4 5 6
Stop
bit
8-data bits
11-bits character frame
7
Even
parity
(8, O, 1)
Start
bit
0 1 2 3 4 5 6
Stop
bit
8-data bits
11-bits character frame
7
Odd
parity
3. Communication Protocol
Communication Data Frame
ASCII mode :
STX Start character = ‘ : ’ (3AH)
Address Hi Communication address:
8-bit address consists of 2 ASCII codes
Address Lo
Function Hi Command code:
8-bit command consists of 2 ASCII codes
Function Lo
DATA (n-1)
Contents of data:
N x 8-bit data consist of 2n ASCII codes
N
≤ 16, maximum of 32 ASCII codes (20 sets of data)
…….
DATA 0
LRC CHK Hi
LRC check sum:
8-bit check sum consists of 2 ASCII codes
LRC CHK Lo
END Hi
End characters:
END Hi = CR (0DH), END Lo = LF (0AH)
END Lo