Static variables - VAR

This function is an extension of the IEC 61131-3 standard.

You declare static variables locally between the keywords ‎VAR_STAT‎ and ‎END_VAR‎. CODESYS initializes static variables the first time each block is called.

You can access static variables only from within the namespace where the variables are declared (like static variables in C). But static variables retain their values when the application leaves the block. For example, you can use static variables as counters for function calls.

You can extend static variables with an attribute keyword.

Example

VAR_STAT
	iVarStat1 : INT;
END_VAR