Communication Protocol - Delta MS300 Series User Manual

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Chapter 12 Description of Parameter SettingsMS300
(7, O, 1)
Start
bit
11-bit character frame (For RTU):
(8, N, 2)
Start
bit
(8, E, 1)
Start
bit
(8, O, 1)
Start
bit

3. Communication Protocol

Communication Data Frame
ASCII mode :
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0 1 2
7-data bits
10-bits character frame
0 1 2
11-bits character frame
0
1 2
11-bits character frame
0 1 2
11-bits character frame
STX
Address Hi
Address Lo
Function Hi
Function Lo
DATA (n-1)
.......
DATA 0
LRC CHK Hi
LRC CHK Lo
END Hi
END Lo
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3 4 5
3 4 5
8-data bits
3 4 5
8-data bits
3 4 5
8-data bits
Start character = ' : ' (3AH)
Communication address:
8-bit address consists of 2 ASCII codes
Command code:
8-bit command consists of 2 ASCII codes
Contents of data:
N x 8-bit data consist of 2n ASCII codes
N ≤ 16, maximum of 32 ASCII codes (20 sets of data)
LRC check sum:
8-bit check sum consists of 2 ASCII codes
End characters:
END Hi = CR (0DH), END Lo = LF (0AH)
12.1-09-3
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Odd
Stop
6
parity
bit
Stop
Stop
6
7
bit
bit
Even
Stop
6
7
parity
bit
Odd
Stop
6
7
parity
bit
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