Tutorial 2: Modbus RTU C# - CRC check sum (16-bit check sum consists of 2 8-bit

CRC checksum: Starting from Address and ending at Data Content. Step 1: Make the 16-bit register (CRC register) = FFFFH Step 2: Exclusive OR the first 8-bit message and the low 16-bit CRC register. Store the result in the CRC register. Step 3: Right shift CRC register for a bit and fill “0” into the high