Delete unused variables

With Extras > Delete unused variables... you can remove unused variables from the POU headers listed in the POU pool and/or from the global variable list. However, you can only delete unused variables in the POU headers and/or in the global variable list if they have not been used in the respective POU bodies.

You can choose the following options:

Delete	Explanation
Unused local variables	All local variables of the POU headers will be deleted if they are not used in the respective POU bodies.
Unused external variables	All variables that are declared as external variables of the POU headers will be deleted if they are not used in the respective POU bodies.
Unused global variables	All variables from the global variable list will be deleted if they are not used in any POU headers.

NOTE

POUs in user libraries are not taken into consideration.

Default setting: Deletion of all variables in all POUs.