Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 1081)

L-force | PLC Designer
Programming Reference
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DMS 4.1 EN 03/2011 TD29 1079
16.3.11 IEC extending Operators
Additionally to the IEC operators »PLC Designer« supports following operators:
• ADR
• BITADR
• INDEXOF
• SIZEOF
• ANDN
• ORN
• XORN
• __DELETE
• __ISVALIDREF
• __NEW
• __QUERYINTERFACE
• __QUERYPOINTER
__DELETE
This operator is not prescribed by the IEC 61131-3 standard.
Note: For compatibility reasons the compiler version must be >= 3.3.2.0.
The operator __DELETE deallocates the memory of objects who has allocated memory
with the operator __NEW before. __DELETE has no return value and its operand will be
set to 0 after the operation.
For allocating use __NEW.
Syntax:
__DELETE( )
If pointer is a pointer to a function block the dedicated method FB_Exit will be called
before the pointer is set to NULL.