Appendix I
RS485 Communication Protocol
112
CMD
03H
Start address high-order
F0H
Start address low-order
01H
Data number high-order
00H
Data number low-order
02H
CRC CHK low-order
CRC CHK values are to be calculated
CRC CHK high-order
END
T1-T2-T3-T4
RTU slave responding information
F9.05 is set to 0: (newly added non-standard MODBUS protocol)
START
T1-T2-T3-T4
ADDR
01H
CMD
03H
Byte number low-order
00H
Byte number high-order
04H
Data address 0001H high-order
13H
Data address 0001H low-order
88H
Data address 0002H high-order
00H
Data address 0002H low-order
00H
CRC CHK low-order
CRC CHK values are to be calculated
CRC CHK high-order
END
T1-T2-T3-T4
When F9.05 is set to 1:
START
T1-T2-T3-T4
ADDR
01H
CMD
03H
Byte number
04H
Data address 0001H high-order
13H
Data address 0001H low-order
88H
Data address 0002H high-order
00H
Data address 0002H low-order
00H
CRC CHK low-order
CRC CHK values are to be calculated
CRC CHK high-order
END
T1-T2-T3-T4