Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 485)

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IEC Operators and additional norm extending functions

DMS 3.2 EN 02/2011 TD29 483
9.7.2 ADRINST
PLC Designer operator: Address Function not prescribed by the standard IEC61131-3.
ADRINST can be used within a function block instance to return the address of this
instance in a DWORD. This address can be sent to manufacturing functions to be
treated as a pointer or it can be assigned to a pointer within the project.
Examples in ST (within a function block instance):
dvar:=ADRINST(); (* Address of the instance is written to
variable dvar *)
fun(a:=ADRINST()); (* The instance address is given to input
parameter a of function fun *)
Examples in IL:
ADRINST
ST dvar
ADRINST
fun
9.7.3 BITADR
PLC Designer operator: Adress function, not prescribed by the standard IEC61131-3.
BITADR returns the bit offset within the segment in a DWORD. Regard that the offset
value depends on whether the option byte addressing in the target settings is
activated or not.
VAR
var1 AT %IX2.3:BOOL;
bitoffset: DWORD;
END_VAR
Example in ST:
bitoffset:=BITADR(var1); (* Result if byte addressing=TRUE:
19, if byte addressing=FALSE: 35 *)