Delta OHM HD45 Series Manual page 68

Example: CRC computation for the message formed by the two information bytes
0000 0010 (02h) and 0000 0111 (07h).
CRC initialization (step 1)
First information byte
XOR computation (step 2)
st
1 right shift (step 3)
Fixed value (1 is the shifted out bit)
XOR computation (step 4)
nd
2 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
rd
3 right shift (step 3)
th
4 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
th
5 right shift (step 3)
th
6 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
th
7 right shift (step 3)
th
8 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
Second information byte
XOR Computation (step 2)
st
1 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
nd
2 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
rd
3 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
XOR Computation
th
4 right shift (step 3)
th
5 right shift (step 3)
Fixed value (step 4, shifted out bit is 1)
1111 1111
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
1000 0001
0100 0000
1010 0000
1110 0000
0111 0000
1010 0000
1101 0000
0110 1000
1010 0000
1100 1000
0110 0100
0011 0010
1010 0000
- 68 -
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 0111
0011 1001
1001 1100 |
0000 0001
1001 1101
0100 1110 |
0000 0001
0100 1111
0010 0111 |
0000 0001
0010 0110
0001 0011 |
0000 1001 |
0000 0001
1
1
0
1
0
1
0
1
1
1
1
0
1