This attribute suppresses the call of the FB_exit method of a function block for a certain one of its instances. To do this you insert the attribute in the line before the declaration of the function block instance.
Syntax:
{attribute 'no-exit'}
Example
The method “FB_exit” is added to the function block “POU_ex”. Two instances of the function block “POU_ex” are created in the main program “PLC_PRG”.
PROGRAM PLC_PRG VAR POU1 : POU_ex; {attribute 'no-exit'} POU2 : POU_ex; END_VAR
POU1 is called, POU2 is not called.