IDENTIFIER_CASE_MISMATCH

Severity: warn

A reference uses a different case than the declaration. IEC ST identifiers are case-insensitive, but inconsistent casing hurts readability and breaks tools that aren't case-folding.

Why it matters. iCount vs icount vs Icount in the same file is a real maintenance smell. Pick a spelling at declaration time and stick to it.

Settings. No check-specific config.

Trigger.

VAR
    iCount : INT;
END_VAR

icount := icount + 1;              (* fires, both refs wrong-cased *)

The bot posts.

🟧 warn  IDENTIFIER_CASE_MISMATCH
'icount' uses a different case than its declaration 'iCount'

Fix. Match the declared spelling.