CRC16_Modbus (FUN)

FUNCTION CRC16_Modbus : WORD

Function calculates the Modbus CRC16 checksum. Deviating from the initial value generally used the check sum will be initialized with 16#FFFF.

Example:

sTest : STRING(10) := '123456789' ;
->
MEM.CRC16_Modbus(ADR(sTest), 9) = 16#4B37

InOut:

Scope Name Type Comment Return CRC16_Modbus WORD function returns the Modbus CRC16 checksum of “MemoryBlock” Input pMemoryBlock POINTER TO BYTE address of memory Block uiLength UINT length of MemoryBlock in byte