11-Bit Character Frame (For 8-Bit Character); Communication Data Frame - Delta VFD-L series User Manual

2.2 11-bit character frame (For 8-bit character):

3.Communication Protocol

3.1 Communication Data Frame:

ASCII mode:
STX
ADR 1
ADR 0
CMD 1
CMD 0
DATA (n-1)
.......
DATA 0
LRC CHK 1
LRC CHK 0
END 1
END 0
RTU mode:
START
ADR
CMD
DATA (n-1)
.......
DATA 0
CRC CHK Low
CRC CHK High
END
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( 8 . N .2 : P r.9 - 0 4 = 3 o r 6 )
S ta rt
0 1 2 3
bit
8 - b i t c h a r a c te r
11 - b i t c h a r a c t e r f r a m e
( 8 .E .1 :P r. 9 - 0 4 = 4 o r 7 )
S ta rt
0 1 2 3
bit
8 - b i t c h a r a c te r
11 - b i t c h a r a c t e r f r a m e
( 8 . O .1 : P r.9 - 0 4 = 5 o r 8 )
S ta rt
0 1 2 3
bit
8 - b i t c h a r a c te r
11 - b i t c h a r a c t e r f r a m e
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: p
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)
A silent interval of more than 10 ms
Communication address:
8-bit address
Command code:
8-bit command
p
Contents of data:
n 8-bit data, n<=25
CRC check sum:
16-bit check sum consists of 2 8-bit characters
A silent interval of more than 10 ms
5-43
S t o p
4 5 6 7
b i t
E ven
4 5 6 7
parity
O dd
4 5 6 7
parity
VFD-L Series
S t o p
b i t
S t o p
b i t
S t o p
b i t
5