Access to function block instances or to program variables is allowed for the implementation of the method.

The ⮫ THIS pointer allows for access to its own function block instance. Therefore, the pointer is allowed only in methods that are assigned to a function block.

A method cannot access ⮫ VAR_TEMP variables of the function block.

A method can call itself recursively.

There is no implementation for interface methods

⮫ Interface methods can have declared input, output, and ‎VAR_IN_OUT‎ variables, but do not contain an implementation.