（*现有5台普通制冷机定为M1、M2、M3、M4、M5和2台高级制冷机定为L1、L2，当普通制冷机工作台数小于等于3台时只启动一台高级制冷机，当普通制冷机工作台数大于3台时启动两台高级制冷机。

*） 

FUNCTION_BLOCK FB5

TITLE = 'Block Title'
//
// Block Comment...
//
VERSION: '1.0'
AUTHOR: Author
NAME: cooler_control
FAMILY: Family

VAR_INPUT
    // Input Parameters
low_cooler_status:ARRAY[1..5]  OF BOOL;  //M1-M5  如果要增加 将5改大

END_VAR

VAR_OUTPUT
high_cooler_run1:BOOL:=false;   //L1
high_cooler_run2:BOOL:=false;  // L2
sum:INT:=0;    //对应M1-M5总共启动的数量
VAR   
i:INT;
END_VAR

    FOR i:= 1 TO 5 BY 1 DO
    IF i=1 THEN
    sum:=  BOOL_TO_INT(low_cooler_status[i]);
    ELSE
    sum:=sum + BOOL_TO_INT(low_cooler_status[i]);
    END_IF;
    IF sum <= 3 THEN
        high_cooler_run1:=true;
        high_cooler_run2:=false;
    ELSIF  sum >3 THEN
        high_cooler_run1:=true;
        high_cooler_run2:=true;
    END_IF;
   
    END_FOR;

   
END_FUNCTION_BLOCK

DATA_BLOCK DB30  FB5
//
// Block Comment...
//
BEGIN

END_DATA_BLOCK