SA0072: Invalid uses of counter variable

Detects the use of a counter variable in a FOR loop

Justification: Manipulation of the counter variable in a FOR loop can easily result in an infinite loop. To prevent the execution of the loop for specific values of the counter variable, use CONTINUE or simply an IF.

Importance: High

PLCopen rule: L12

PROGRAM PLC_PRG
VAR_TEMP
    iIndex : INT;
END_VAR

FOR iIndex := INT#0 TO INT#20 BY INT#1 DO
    iIndex := iIndex - INT#1;
END_FOR