Delta MH300 Series - Page 1017

Appendix A. Modbus Protocol
MS300
A-6
RTU mode:
Command Message Response Message
Address
01H
Address
01H
Function
06H
Function
06H
Target register
01H
Target register
01H
00H
00H
Register content
17H
Register content
17H
70H
70H
CRC Check Low
CRC Check High
86H
CRC Check Low
CRC Check High
86H
22H
22H
5. 10H: write multiple registers (can write at most 20 sets of data simultaneously).
Example: Set the multi-step speed of an AC motor drive (address is 01H),
Pr.04-00 = 50.00 (1388H), Pr.04-01 = 40.00 (0FA0H.)
ASCII mode:
Command Message Response Message
STX
‘:’
STX
‘:’
ADR 1
ADR 0
‘0’
ADR 1
ADR 0
‘0’
‘1’
‘1’
CMD 1
‘1’
CMD 1
‘1’
CMD 0
‘0’
CMD 0
‘0’
Target register
‘0’
Target register
‘0’
‘5’
‘5’
‘0’
‘0’
‘0’
‘0’
Number of register
(count by word)
‘0’
Number of register
(count by word)
‘0’
‘0’
‘0’
‘0’
‘0’
‘2’
‘2’
Number of register
(count by byte)
‘0’
LRC Check
‘E’
‘4’
‘8’
The first data content
‘1’
END
CR
‘3’
LF
‘8’
‘8’
The second data content
‘0’
‘F’
‘A’
‘0’
LRC Check
‘9’
‘A’
END
CR
LF