Delta VFD004L11A User Manual page 62

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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 '0'
ADR 0
'1'
CMD 1 '0'
CMD 0
'3'
Starting data '2'
address
'1'
'0'
'2'
Number of data '0'
(count by word)
'0'
'0'
'2'
LRC CHK 1 'D'
LRC CHK 0
'7'
END 1 CR
END 0
LF
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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