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Appendix B. Modbus ProtocolEB3000
3. 10H: write multiple registers (can write at most 20 sets of data simultaneously)
Example: Set the multi-step speed Pr.00-50 = 50.00 (1388H) of an AC motor drive (address is 01H),
ASCII mode:
Command Message
STX
ADR 1
ADR 0
CMD 1
CMD 0
Target register
Number of register
(count by word)
Number of register
(count by byte)
The first data content
The second data content
LRC Check
END
RTU mode:
Command Message
ADR
CMD
Target register
Number of register
(count by word)
Quantity of data (byte)
The first data content
The second data content
CRC Check Low
CRC Check High
':'
'0'
'1'
'1'
'0'
'0'
'0'
Target register
'3'
'2'
'0'
'0'
Number of register
'0'
(count by word)
'2'
'0'
LRC Check
'4'
'1'
'3'
'8'
'8'
'0'
'F'
'A'
'0'
'9'
'A'
CR
LF
01H
10H
00H
Target register
32H
00H
Number of register
02H
(count by word)
04
CRC Check Low
13H
CRC Check High
88H
0FH
A0H
'9'
'A'
B-8
Response Message
STX
ADR 1
ADR 0
CMD 1
CMD 0
END
Response
ADR
CMD
':'
'0'
'1'
'1'
'0'
'0'
'0'
'3'
'2'
'0'
'0'
'0'
'2'
'E'
'8'
CR
LF
01H
10H
00H
32H
00H
02H
41H
04H
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