Modbus - Wikipedia, the free encyclopedia
Note about the CRC: Polynomial: x 16 + x 15 + x 2 + 1 (CRC-16-ANSI also known as CRC-16-IBM, normal hexadecimal algebraic polynomial being 8005 and reversed A001) Initial value: 65,535 Example of frame in hexadecimal: 01 04 02 FF FF B8 80 (CRC-16-ANSI ......