检测可能存在零除法的代码位置
理由绝不能出现除以零的情况，而且应首先检查变量分母是否为 0。
重要性：高
示例
VAR_GLOBAL
g_iVar AT %QW1 : INT ;
END_VAR
PROGRAM PLC_PRG
VAR
iCounter : INT;
iSumme:INT;
iMid:INT;
iVal1:INT := INT#2;
iVal2:INT;
iVal3:INT := INT#3;
iVal4:INT := INT#4;
iVal5:INT;
END_VAR
IF iVal2 <> 0 THEN
iVal1 := iVal1/iVal2; // no error
END_IF;
iMid := iSumme / iCounter; // SA0040
iCounter := iCounter + INT#1;
iSumme := g_iVar + iSumme;
IF iMid < INT#100 THEN
iVal1 := iVal1 / iVal2; // SA0040
END_IF
--> SA0040: Possible division by zero
--> SA0040: Possible division by zero