MEM.CRC16_Modbus (FUN)

This function of the CAA_Memory.library calculates the Modbus CRC16 check sum. Deviating from the initial value generally used the check sum will be initialized with 16#FFFF.

Input:

pMemoryBlock	DWORD	Address of memory area
uiLength	UINT	Size of area in bytes

Output:

MEM.CRC16_Modbus

WORD

Check sum

Example:

sTest : STRING(10) := '123456789' ;

MEM.CRC16_Modbus(ADR(sTest), 9) = 16#4B37