F_GetMonthOfDOY

F_GetMonthOfDOY 1:

The function calculates the month from day number of the year.

FUNCTION F_GetMonthOfDOY: WORD

VAR_INPUT

VAR_INPUT
    wYear : WORD;(* Year: 0..2xxx *)
 wDOY : WORD;(* Year's day number: 1..366 *)
END_VAR

wYear: Year (0 ~ 2999).

wDOY: Day number of the year (1 ~ 366).

Return value	Description
0	Invalid wYear or wDOY parameter.
> 0	No error. Month (1 ~ 12)

Example:

PROGRAM P_TEST_DOY
VAR
    wYear       : WORD;
    wDOY        : WORD;
    wMonth      : WORD;
END_VAR

wYear := 2009;
wDOY := 31;
wMonth:= F_GetMonthOfDOY( wYear, wDOY );(* wMonth = 1 *)

wYear := 2009;
wDOY := 32;
wMonth := F_GetMonthOfDOY( wYear, wDOY );(* wMonth = 2 *)

wYear := 2009;
wDOY := 60;
wMonth := F_GetMonthOfDOY( wYear, wDOY );(* wMonth = 3 *)

Requirements

Development environment	Target System	PLC libraries to include
TwinCAT v2.10.0 Build > 1340 TwinCAT v2.11.0 Build > 1530	PC or CX (x86, ARM)	TcUtilities.Lib