Delta MS300 Series User Manual page 792

(7, O, 1)
11-bit character frame (For RTU):
(8, N, 2)
(8, E, 1)
(8, O, 1)
A-3 Communication Protocol
Communication data frame
1.
ASCII mode:
STX
Address High
Address Low
Function High
Function Low
DATA (n-1)
.......
DATA 0
LRC Check High
LRC Check Low
END High
END Low
Start character = ':' (3AH)
Communication address:
one 8-bit address consists of 2 ASCII codes
Command code:
one 8-bit command consists of 2 ASCII codes
Contents of data:
n x 8-bit data consists of 2n ASCII codes
n ≤ 16, maximum of 32 ASCII codes (20 sets of data)
LRC checksum:
one 8-bit checksum consists of 2 ASCII codes
End characters:
END1= CR (0DH), END0= LF(0AH)
783
Appendix A. Modbus ProtocolMS300