SA0029: Notation in code different to declaration

Detects the code locations where the notation of an identifier is different from the notation in its declaration

Justification: The IEC 61131-3 standard defines identifiers as not case-sensitive. This means that a variable declared as "varx" can also be used as "VaRx" in the code. However, this is confusing and misleading and should be avoided.

Importance: Medium

Example

A PLC_PRG POU and a fnc (function) POU exist in the device tree.

PROGRAM PLC_PRG
VAR
        iVar: INT;
        _123test_var_: INT;
END_VAR

ivar := iVar + 1;                   // SA0029
_123TEST_var_ := _123test_var_;            // SA0029
Fnc();                              // SA0029

--> SA0029: Notation in Code (ivar) muss der Deklaration (iVar) entsprechen
--> SA0029: Notation in Code (_123TEST_var_) muss der Deklaration (_123test_var_) entsprechen
--> SA0029: Notation in Code (Fnc) muss der Deklaration (fnc) entsprechen