SATO CL4NX Programming Reference Manual page 752

CRC-16-CCITT
Calculation range of CRC
Send and received data before compression is the calculation range.
(1)
Number of
data byte
4 bytes
Method for calculating CRC
Use CRC-16-CCITT for calculating CRC.
Polynomial: X^16+X^12+X^5+X^0
Initial value: 0xFFFF
Following page shows an example of programming.
CRC calculation range
Send and received data before compression
(2)
Compressed send and received data
750
(3)
CRC
2 bytes