Delta VFD004L11A User Manual page 61

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2.2 11-bit character frame (For 8-bit character):
3.Communication Protocol
3.1 Communication Data Frame:
ASCII mode:
RTU mode:
CRC CHK Low
CRC CHK High
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( 8 . N .2 : P r.9 - 0 4 = 3 o r 6 )
S ta rt
0
bit
( 8 .E .1 :P r. 9 - 0 4 = 4 o r 7 )
S ta rt
0
bit
( 8 . O .1 : P r.9 - 0 4 = 5 o r 8 )
S ta rt
0
bit
STX Start character ':' (3AH)
ADR 1 Communication address:
8-bit address consists of 2 ASCII codes
ADR 0
CMD 1 Command code:
8-bit command consists of 2 ASCII codes
CMD 0
Contents of data: p
DATA (n-1)
n 8-bit data consist of 2n ASCII codes.
.......
n<=25
DATA 0
LRC CHK 1 LRC check sum:
8-bit check sum consists of 2 ASCII codes
LRC CHK 0
END 1 End characters:
END1= CR (0DH), END0= LF(0AH)
END 0
START A silent interval of more than 10 ms
Communication address:
ADR
8-bit address
Command code:
CMD
8-bit command
DATA (n-1)
Contents of data: p
.......
n 8-bit data, n<=25
DATA 0
CRC check sum:
16-bit check sum consists of 2 8-bit characters
END A silent interval of more than 10 ms
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1 2 3 4 5
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
5
1 2 3 4
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
1 2 3 4 5
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

maximum of 50 ASCII codes
5-43
S t o p S t o p
6 7
b i t b i t
E ven
S t o p
6 7
parity
b i t
O dd
S t o p
6 7
parity
b i t
VFD-L Series
5