
VFD-M …………..………………………….…… . 70
3.4. CHK ( )
ASCII режим:
LRC ( ) , 256,
ADR1 ,
2- . , 1
0401H 01H.
STX ‘:’
ADR1 ‘0’
ADR0 ‘1’
CMD1 ‘0’
CMD0 ‘3’
‘0’
‘4’
‘0’
‘1’
‘0’
‘0’
'0’
‘1’
LRC CHK 1 ‘F’
LRC CHK 0 ‘6’
END1 CR
END0 LF
01H+03H+04H+01H+00H+01H=0AH,
2- 0AH
F6
H.
RTU :
ADR 01H
CMD 03H
21H
02H
00
( ) 02H
CRC CHK Low 6FH
CRC CHK High F7H
CRC ( ) :
1 : 16-bit ( CRC ) FFFFH;
2: 8-bit
16-bit CRC, CRC .
3: CRC MSB .
LSB.
4: LSB CRC 0, 3,
CRC A001H.
5: 3 4, , .
, 8-bit .
6: 2 5 8-bit .
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