F_GetDayOfMonthEx

The function calculates the date of the first, second etc. weekday in a particular month and year (e.g. the date of the second Monday in January 2011 ).

FUNCTION F_GetDayOfMonthEx: WORD

Inputs

VAR_INPUT
    wYear  : WORD(1601..30827);
    wMonth : WORD(1..12);
    wWOM   : WORD(1..5);
    wDOW   : WORD(0..6);
END_VAR

Name	Type	Description
wYear	WORD	Year (1601 to 30827)
wMonth	WORD	Month (1 to 12)
wWOM	WORD	Week of the month (1 to 5). The value 1 corresponds to week 1, 2 to week 2 and 5 to the last week (even if the month does not have 5 weeks).
wDOW	WORD	Day of the week (0 to 6). 0 = Sunday, 1 = Monday... 6 = Saturday

Return parameter	Description
0	Error, wrong or invalid function parameter
> 0	No error. Day of the month

Example:

The example determines the date of the second Monday in August 2011. The result is: 8.

PROGRAM P_Dok_F_GetDayOfMonthEx
VAR
    wYear   : WORD := 2011;
    wMonth  : WORD := 8;
    wWOM    : WORD(1..5) := 2;(* Week of month: 2 = Second week *)
    wDOW    : WORD(0..6) := 1;(* Day of week 1 = Monday *)
    wDay    : WORD;(* Day of month *)
END_VAR

wDay := F_GetDayOfMonthEx( wYear, wMonth, wWOM, wDOW );

Requirements

Development environment	Target platform	PLC libraries to be integrated (category group)
TwinCAT v3.1.0	PC or CX (x86, x64, Arm^®)	Tc2_Utilities (System)