Mitsubishi MELSEC iQ-F FX5 series - Page 578

576
7 APPLICATION INSTRUCTION
7.17 Data operation instruction
Precautions
• In these instructions, "X
16
+X
15
+X
2
+1" is used in a polynomial for generating the CRC value (CRC-16). There are many
other standard polynomials for generating the CRC value. Note that the CRC value completely differs if an adopted
polynomial is different. Major polynomials for generating the CRC value are shown below.
Operation error
There is no operation error.
Name Polynomial
CRC-12 X
12
+ X
11
+ X
3
+ X
2
+ X + 1
CRC-16 X
16
+ X
15
+ X
2
+ 1
CRC-32 X
32
+ X
26
+ X
23
+ X
22
+ X
16
+ X
12
+ X
11
+ X
10
+ X
8
+ X
7
+ X
5
+ X
4
+ X
2
+ X + 1
CRC-CCITT X
16
+ X
12
+ X
5
+ 1