Operator: __POOL
The operator is an extension of the IEC 61131-3 standard.
The operator is used to reference objects which are managed in the global POU pool (in the POUs view). The operator directly accesses objects in the POUs view.
Example 164. Example
PROGRAM PLC_PRG VAR svar_pou : STRING; END_VAR svar_pou := __POOL.POU();
For more information, see: How to prevent shadowing