General

1. Intercept division by zero. [++]

Intercept division by zero

To prevent runtime errors, a non-zero query should always be made before a division.

Static Analysis:

Check with the help of Static Analysis rule:

• SA0040: Possible division by zero

General program elements for the following samples:

FUNCTION F_Sample
VAR_INPUT
    fDividend : LREAL;
    fDivisor  : LREAL;
END_VAR
VAR
    fResult   : LREAL;
END_VAR

Negative sample:

fResult := fDividend / fDivisor;

Positive sample:

IF fDivisor <> 0 THEN
    fResult := fDividend / fDivisor;
END_IF