Delta Electronics Network Device VFD-S Dokumentacja Pobierz pdf (Strona 66)

VFD-S Series

5-49

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

Start

bit

0123456

Stop

bit

Stop

bit

8-bit character

11-bit character frame

( 8.N.2:Pr.9-04=3 or 6 )

Start

bit

01234

Even

arity

Stop

bit

11-bit character frame

( 8.E.1:Pr.9-04=4 or 7)

Start

bit

01234

Stop

bit

11-bit character frame

( 8.O.1:Pr.9-04=5 or 8)

Odd

parity

8-bit character

! 3.Communication Protocol

3.1 Communication Data Frame:

ASCII mód:

STX Start character ‘:’ (3AH)

ADR 1

ADR 0

Communication address:

8-bit address consists of 2 ASCII codes

CMD 1

CMD 0

Command code:

8-bit command consists of 2 ASCII codes

DATA (n-1)

…….

DATA 0

Contents of data:

n x 8-bit data consist of 2n ASCII codes.

n <= 25，maximum of 50 ASCII codes

LRC CHK 1

LRC CHK 0

LRC check sum:

8-bit check sum consists of 2 ASCII codes

END 1

END 0

End characters:

END1= CR (0DH), END0= LF (0AH)

RTU mód:

START A silent interval of more than 10 ms

ADR Communication address: 8-bit address

CMD Command code: 8-bit command

DATA (n-1)

…….

DATA 0

Contents of data:

n x 8-bit data, n<= 25

CRC CHK Low

CRC CHK High

CRC check sum:

16-bit check sum consists of 2 8-bit characters

END A silent interval of more than 10 ms

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 129 130

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Delta Electronics Network Device VFD-S Dokumentacja Strona 66

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