AutomationDirect DURAPULSE GS3-2010, User Manual

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Chapter 5:
DURA
PULSE MODBUS Communications
5–70
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 the AC drive with address 01H.
ASCII mode:
RTU mode:
Command Message Response Message
ADR 01H ADR 01H
CMD 03H CMD 03H
Starting data
address
21H
Number of data
(Count by byte)
04H
02H '0'
Number of data
(Count by word)
00H
Content of data
address 2102H
17H
02H 70H
CRC CHK Low
CRC CHK High
6FH
Content of data
address 2103H
00H
F7H 02H
CRC CHK Low
CRC CHK High
FEH
5CH
Command Message Response Message
STX ':' STX ':' ':'
ADR 1
ADR 0
'0'
ADR 1
ADR 0
'0'
'1' '1'
CMD 1
CMD 0
'0'
CMD 1
CMD 0
'0'
'3' '3'
Starting data
address
'2'
Number of data
(Count by byte)
'0'
'1' '4'
'0'
Content of starting
data address
2102H
'1'
'2' '7'
Number of data
(Count by word)
'0' '7'
'0' '0'
'0'
Content data
address 2103H
'0'
'2' '0'
LRC CHK 1
LRC CHK 0
'D' '0'
'7' '0'
END 1
END 0
CR
LRC CHK 1
LRC CHK 0
'7'
LF '1'
END 1
END 0
CR
LF
DURA
PULSE AC Drive User Manual 1st Ed. Rev. D 05/2013