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銆�銆�PROGRAM Simulation
銆�銆�VAR
銆�銆�T1: TON;                            //The temperature is decreased on a time delay锛� when the comepressor has been activated
銆�銆�P_Cooling: TIME:=T#500MS;
銆�銆�xReduceTemp: BOOL;                  //Signal for dereasing the temperature
銆�銆�T2: TON;                            //The temperature is increased on a time delay锛� when the compressor has been activated
銆�銆�P_Environment: TIME:=T#2S;          //Delay time when the door is closed
銆�銆�P_EnvironmentDoorOpen: TIME:=T#1S;  //Delay time when the door is open
銆�銆�xRaiseTemp: BOOL;                   //Signal for increasing the temperature
銆�銆�timTemp: TIME;                      //Delay time
銆�銆�iCounter: INT;
銆�銆�END_VAR
銆�銆�iCounter := iCounter+1;     // No function锛� just for demonstration purposes.
銆�銆�// After the compressor has been activated due to TempActual being too high锛� the temperature decreases.
銆�銆�// The temperature is decremented by 0.1掳C per cycle after a delay of P_Cooling
銆�銆�IF Glob_VAR.bCompressor THEN
銆�銆�T1(IN:= Glob_Var.bCompressor锛� PT:= P_Cooling锛� Q=>xReduceTemp);
銆�銆�IF xReduceTemp THEN
銆�銆�Glob_Var.rTempActual := Glob_Var.rTempActual-0.1;
銆�銆�T1(IN:=FALSE);
銆�銆�END_IF
銆�銆�END_IF
銆�銆�//If the door is open锛� the warming occurs faster; SEL selects P_EnvironmentDoorOpen
銆�銆�timTemp:=SEL(Glob_Var.rDoorOpen锛� P_Environment锛� P_EnvironmentDoorOpen);
銆�銆�//If the compressor is not in operation锛� then the cooling chamber becomes warmer.
銆�銆�//The  temperature is incremented by 0.1掳C per cycle after a delay of tTemp
銆�銆�T2(IN:= TRUE锛� PT:= timTemp锛� Q=>xRaiseTemp);
銆�銆�IF xRaiseTemp THEN
銆�銆�Glob_Var.rTempActual := Glob_Var.rTempActual + 0.1;
銆�銆�T2(IN:=FALSE);
銆�銆�END_IF

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