Delta VFD-L Series

VFD-L Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
5-44
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:
C
ommand message:
R
esponse 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
LF
LRC CHK 1
LRC CHK 0
‘1’
CR END 1
END 0
LF