NOTICE
If a local variable that is declared in a block has the same name as a global variable, then it has precedence within the block.
NOTICE
For compiler version 3.2.0.0 and higher, CODESYS always initializes global variables before the local POU variables.
Global variables are variables, constants, external or remanent variables which are
recognized within the entire project. You declare global variables in global variable
lists or in the declaration part of programming objects between the keywords VAR_GLOBAL and END_VAR.
Example
VAR_GLOBAL
g_iVar1 : INT;
END_VAR
The system recognizes a global variable when you prepend the variable name with a
dot (example: .g_iVar1).