区域监控功能可能导致无限循环。例如，如果 FOR 循环 [...] ); ... END_VAR FOR ui:=0 TO 10000 DO

expression> DO [...] Counter <> 0 DO Var1 := Var [...] 循环比 FOR 循环更强大，因为

PUBLIC DoIt : BOOL VAR [...] THEN FOR uiCnt := 1 TO uiN DO m

); // Allocates 16 bytes for pb [...] ); // Allocates memory for pb [...] ; FOR usiCnt := 0 TO

comparison FOR iCount := 0 [...] DO IF any1.pvalue [...] RETURN; END_IF END_FOR

Locals.g_diaData[0]; FOR diIndex := 0 TO 99 DO b [...] Index]); END_FOR PROGRAM

_VAR FOR idx := 0 TO 6 DO Ary[idx] := 0; END_FOR 具有

变量 类别 例子 多变的： PLC_PRG.fb_Do [...] 执行点时执行的代码 循环结构（For、While）和