Adr (Communication Address); Cmd (Command Code) And Data (Data Characters) - Delta VFD-L series User Manual

VFD-L Series
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 mode:
Command message:
STX
ADR 1
ADR 0
CMD 1
CMD 0
Starting data
address
Number of data
(count by word)
LRC CHK 1
LRC CHK 0
END 1
END 0
':'
'0'
'1'
'0'
'3'
'2'
'1'
'0'
'2'
'0'
'0'
'0'
'2'
'D'
'7'
CR
LF
5-44
Response message:
STX
ADR 1
ADR 0
CMD 1
CMD 0
Number of data
(count by byte)
Content of
starting data
address
2102H
Content of data
address 2103H
LRC CHK 1
LRC CHK 0
END 1
END 0
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':'
'0'
'1'
'0'
'3'
'0'
'4'
'1'
'7'
'7'
'0'
'0'
'0'
'0'
'0'
'7'
'1'
CR
LF