Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 66

The following is a calculation example in the case where function code 05H is sent to station No. (address field) 2.
CRC error check procedure
(Load the register whose 16 bits are all "1")
02H (Station No.)
Exclusive OR (XOR)
Shift 1
Generator value
Exclusive OR (XOR)
Shift 2
Generator value
Exclusive OR (XOR)
Shift 3
Shift 4
Generator value
Exclusive OR (XOR)
Shift 5
Shift 6
Generator value
Exclusive OR (XOR)
Shift 7
Shift 8
Generator value
Exclusive OR (XOR)
05H (Function code)
Exclusive OR (XOR)
Shift 1
Generator value
Exclusive OR (XOR)
Shift 2
Shift 3
Shift 4
Generator value
Exclusive OR (XOR)
Shift 5
Shift 6
Generator value
Exclusive OR (XOR)
Shift 7
Generator value
Exclusive OR (XOR)
Shift 8
CRC value
APPX
64
Appendix 3 The frame specifications
Address field Function code
(02H)
16-bit register
1111
1111
0000 0000
1111 1111
0111 1111
1010 0000
1101 1111
0110 1111
1010 0000
1100 1111
0110 0111
0011 0011
1010 0000
1001 0011
0100 1001
0010 0100
1010 0000
1000 0100
0100 0010
0010 0001
1010 0000
1000 0001
0000 0000
1000 0001
0100 0000
1010 0000
1110 0000
0111 0000
0011 1000
0001 1100
1010 0000
1011 1100
0101 1110
0010 1111
1010 0000
1000 1111
0100 0111
1010 0000
1110 0111
0111 0011
73H
CRC (Error check)
(05H) (C1H)
Carry Flag
1111 1111
0000 0010
1111 1101
1111 1110
0000 0001
1111 1111
1111 1111
0000 0001
1111 1110
1111 1111
1111 1111
0000 0001
1111 1110
1111 1111
1111 1111
0000 0001
1111 1110
0111 1111
0011 1111
0000 0001
0011 1110
0000 0101
0011 1011
1001 1101
0000 0001
1001 1100
0100 1110
0010 0111
0001 0011
0000 0001
0001 0010
0000 1001
0000 0100
0000 0001
0000 0101
1000 0010
0000 0001
1000 0011
1100 0001
C1H
(73H)
1
1
0
1
0
1
0
1
1
0
0
1
0
1
1
1