Communication Protocol - Delta EB3000 Series User Manual

B-4 Communication Protocol
B-4-1 Communication Data Frame
ASCII mode:
STX
Address High
Address Low
Function High
Function Low
DATA (n-1)
to
DATA 0
LRC Check High
LRC Check Low
END High
END Low
RTU mode:
START
Address
Function
DATA (n-1)
to
DATA 0
CRC Check Low
CRC Check High
END
B-4-2 Communication Address (Address)
00H: broadcast to all AC motor drives
01H: AC motor drive of address 01
0FH: AC motor drive of address 15
10H: AC motor drive of address 16
:
FEH: AC motor drive of address 254
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)
Defined by a silent interval of larger than / equal to 10 ms
Communication address: 8-bit binary address
Command code: 8-bit binary command
Contents of data:
n × 8-bit data, n ≤ 16
CRC checksum:
one 16-bit CRC checksum consists of 2 8-bit binary characters
Defined by a silent interval of larger than / equal to 10 ms
Appendix B. Modbus ProtocolEB3000
B-5