Hello i tro to create a program to turn on or off the air condition in relationship temperature and numer of day. I can't get the number of day.

I try this after installing SysTime library but this not work and have this error on debug
------ Build started: Application: Device.Sim.Device.Application -------
Typify code...
Generate code...
[ERROR] giorno_accensione_aria: PLC_PRG Device: PLC Logic: Application: C0032: Cannot convert type 'Unknown type: 'SysTimeCore(TRUE)'' to type 'TIME'
[ERROR] giorno_accensione_aria: PLC_PRG Device: PLC Logic: Application: C0035: Program name, function or function block instance expected instead of 'SysTimeCore'
[ERROR] giorno_accensione_aria: PLC_PRG Device: PLC Logic: Application: C0032: Cannot convert type 'Unknown type: 'DayOfWeek(CurrentTime)'' to type 'INT'
[ERROR] giorno_accensione_aria: PLC_PRG Device: PLC Logic: Application: C0035: Program name, function or function block instance expected instead of 'DayOfWeek'
[INFORMATION] giorno_accensione_aria: PLC_PRG Device: PLC Logic: Application: C0181: Related position
Build complete -- 4 errors, 0 warnings : No download possible

PROGRAM PLC_PRG
VAR
  Temperatura: UDINT;
  AriaCondizionata: BOOL := FALSE;
  CurrentDayOfWeek: INT; //Variabile Giorno 
  CurrentTime: TIME;  
  GiornoDellaSettimana: INT;
  DayOfWeek: INT;
END_VAR

CurrentTime := SysTimeCore(TRUE);  // Ottieni l'ora corrente
CurrentDayOfWeek := DayOfWeek(CurrentTime);

CASE GiornoDellaSettimana OF
  1:
    // Azioni per Lunedì
  2:
    // Martedì se più 10° accend altrimenti spegni
IF Temperatura >= 10 THEN
    AriaCondizionata := TRUE;
ELSE
    AriaCondizionata := FALSE;  
END_IF
  3:
    // Mercoledì se più di 50° accendi altrimenti spegni
IF Temperatura >=50 THEN
    AriaCondizionata := TRUE;
ELSE
    AriaCondizionata := FALSE;
END_IF
  4:
    // Giovedì se più di 40° accendi altrimenti spegni
IF Temperatura >=40 THEN
    AriaCondizionata := TRUE;
ELSE
    AriaCondizionata := FALSE;
END_IF
  5:
    // Venerdì se più di 50° accendi altrimenti spegni
IF Temperatura >=50 THEN
    AriaCondizionata := TRUE;
ELSE
    AriaCondizionata := FALSE;
END_IF
  6:
    // Sabato se più di 25° accendi altrimenti spegni
IF Temperatura >=25 THEN
    AriaCondizionata := TRUE;
ELSE
    AriaCondizionata := FALSE;
END_IF
  7:
    // Domenica sempre spenta
    AriaCondizionata := FALSE;
END_CASE

For a demo application related to date/time, see:
https://forge.codesys.com/prj/codesys-example/date-and-time/home/Home/

The SysTimeRtcConvertUtcToDate function does this for you and applies the output to RTS_SYSTIMEDATE struct. This is part of the SysTimeRtc library.

Hello and thank you so much for your replay. I'm a beginner and i have install the library but i cant use..how can i use a library and function on codesys?

I try to insert on my POU VAR

rtcInstance: SysTimeRtc.ReadTime; // Dichiara una variabile per la funzione di lettura

And then on my program

// Leggi il tempo reale
rtcInstance();

But have this error

"C0035: Program name, function or function block instance expected insted of "rtcInstance"

Where i'm wrong?

Hello and thank you so much for your replay. I'm a beginner and i have install the library but i cant use..how can i use a library and function on codesys?

I try to insert on my POU VAR

rtcInstance: SysTimeRtc.ReadTime; // Dichiara una variabile per la funzione di lettura

And then on my program

// Leggi il tempo reale
rtcInstance();

But have this error

"C0035: Program name, function or function block instance expected insted of "rtcInstance"

Where i'm wrong?