11-Bit Character Frame (For Rtu); Communication Protocol; Communication Data Frame; Ascii Mode - Delta VFD-B Series User Manual

VFD-B Series
( 7.N.2)
Start
( 7.E.1)
Start
( 7.O.1)
Start

11-bit character frame (For RTU):

( 8.N.2 )
Start
bit
( 8.E.1 )
Start
bit
( 8.O.1 )
Start
bit

3. Communication Protocol

3.1 Communication Data Frame:

ASCII mode:

STX
ADR 1
ADR 0
CMD 1
CMD 0
DATA (n-1)
to
DATA 0
LRC CHK 1
LRC CHK 0
END 1
END 0
RTU mode:
0 1 2
bit
7-bit character
10-bit character frame
0 1 2
bit
7-bit character
10-bit character frame
0 1 2
bit
7-bit character
10-bit character frame
0 1 2 3
8-bit character
11-bit character frame
0 1 2 3
8-bit character
11-bit character frame
0 1 2 3
8-bit character
11-bit character frame
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×8-bit data consist of 2n ASCII codes.
n<=25, maximum of 50 ASCII codes
LRC check sum:
8-bit check sum consists of 2 ASCII codes
End characters:
END1= CR (0DH), END0= LF(0AH)
Stop
5
3 4 6
bit
Even
3 4 5 6
parity
Odd
3 4 5 6
parity
Stop
4 5 6 7
bit
Even
4 5 6 7
parity
Odd
4 5 6 7
parity
5-56
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bit
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bit
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bit
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bit
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