Instruction manual

6. MODBUS COMMUNICATION PROTOCOL
IMR01H02-E3
48
!"
!"!"
!"
The flow chart of CRC-16
START
FFFFH
→
CRC Register
0
→ n
Shift CRC Register right 1 bit
Carry flag is
1
No
Yes
CRC Register
⊕
A001H
→
CRC Register
n
+ 1
→
n
No
Yes
n
>
7
No
Yes
Is message
complete ?
END
CRC Register
⊕
next byte of the message
→
CRC Register
The ⊕ symbol indicates an exclusive OR operation. The symbol for the number of data bits is n.