SA0075: Missing ELSE

Function	Determines CASE statements without ELSE branch.
Reason	Defensive programming requires the presence of an ELSE in every CASE statement. If no action is required in the ELSE case, you should indicate this with a comment. The reader of the code is then aware that the case was not simply overlooked.
Exception	A missing ELSE branch is not reported as missing if an enumeration declared with the 'strict' attribute is used in the CASE statement, and if all enumeration constants are listed in that CASE statement.
Importance	Low
PLCopen rule	L17

Sample:

{attribute 'qualified_only'}
{attribute 'strict'}
{attribute 'to_string'}
TYPE E_Sample :
(
    eNull,
    eOne,
    eTwo
);
END_TYPE

PROGRAM MAIN
VAR 
    eSample : E_Sample;
    nVar    : INT;
END_VAR

CASE eSample OF
    E_Sample.eNull: nVar := 0;
    E_Sample.eOne:  nVar := 1;
    E_Sample.eTwo:  nVar := 2;
END_CASE

CASE eSample OF                  // => SA0075
    E_Sample.eNull: nVar := 0;
    E_Sample.eTwo:  nVar := 2;
END_CASE