Delta Electronics Network Device VFD-S Especificaciones descargar pdf (Pagina 67)

VFD-S Series

5-50

3.2 ADR (Communication Address)

Valid communication addresses are in the range of 0 to 254. Communication address

equals to 0 means broadcast to all AC drives (AMD), in this case, the AMD will not reply

any message to the master device.

For example, communication to AMD with address 16 decimal:

ASCII mode: (ADR 1, ADR 0) =’1’,’0’ ≥ ‘1’=31H, ‘0’=30H

RTU mode: (ADR) = 10H

3.3 CMD (Command code) and DATA (data characters)

The format of data characters depends on the command code. The available

command codes are described as followed: Command code: 03H, read N words. The

maximum value of N is 12. For example, reading continuous 2 words from starting

address 2102H of AMD with address 01H.

ASCII mód:

Command message: Response message:

STX ‘:’ STX ‘:’

‘0’ ‘0’ ADR 1

ADR 0

‘1’

ADR 1

ADR 0

‘1’

‘0’ ‘0’ CMD 1

CMD 0

‘3’

CMD 1

CMD 0

‘3’

‘2’ ‘0’

‘1’

Number of data

(count by byte)

‘4’

‘0’ ‘1’

Starting data

address

‘2’ ‘7’

‘0’ ‘7’

‘0’

Content of starting data

address 2102H

‘0’

‘0’ ‘0’

Number of data

(count by word)

‘2’ ‘0’

‘D’ ‘0’ LRC CHK 1

LRC CHK 0

‘7’

Content of data address

2103H

‘0’

CR ‘7’ END 1

END 0

LRC CHK 1

LRC CHK 0

‘1’

END 1

END 0

RTU mód:

Command message: Response message:

ADR 01H ADR 01H

CMD 03H CMD 03H

21H Starting data address

02H

Number of data (count by byte) 04H

00H 17H Number of data

(count by word)

02H

Content of data address 2102H

70H

CRC CHK Low 6FH 00H

CRC CHK High F7H

Content of data address 2103H

00H

CRC CHK Low FEH

CRC CHK High 5CH

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 129 130

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Delta Electronics Network Device VFD-S Especificaciones Pagina 67

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