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Configuration variables - VAR_CONFIGdl-permalink__symbolPermalink

Use configuration variables for assigning complete addresses to variables that are declared in function blocks with incomplete addresses and will be mapped on device I/Os.

Declare the variables in a global variables list between ‎VAR_CONFIG‎ and ‎END_VAR‎. The global variables list is termed "variables configuration", where you type the configuration variables with a complete instance path and the correct address.

Example

Declaration of the variable ‎xLocIn‎ with incomplete address ‎%I*‎ in a function block:

FUNCTION_BLOCK locio 

VAR 
	xLocIn AT %I* : BOOL := TRUE; 
END_VAR

The ‎locio‎ function block is used in the ‎PLC_PRG‎ program: 

PROGRAM PLC_PRG 

VAR 
	locioVar1 : locio; 
END_VAR

The correct variables configuration in the global variable list is as follows:

VAR_CONFIG 

  PLC_PRG.locioVar1.xLocIn AT %IX1.0 : BOOL; 

END_VAR