SYSTEMTIME_TO_DT

The "SYSTEMTIME_TO_DT" function allows the Windows system time structure to be converted to the DATE_AND_TIME format (DT) usual in a PLC. The system time has a resolution of 1ms, while the resolution of DATE_AND_TIME is 1s. The milliseconds from the system time are used in the course of the conversion to determine the direction of rounding for the returned DATE_AND_TIME value. To disable rounding, set the wMilliseconds element in the Windows system time structure to zero.

FUNCTION SYSTEMTIME_TO_DT: DT

VAR_INPUT
    TIMESTR : TIMESTRUCT;
END_VAR

PROGRAM SystemTimeTest
VAR
    SystemTimeStruct  : TIMESTRUCT;
    DTFromSystemTime  : DT;
END_VAR