referenceMethods

ref."method"

assign

Use assign operator to assign a variable to a reference variable:
B&R: myRef ACCESS ADR(variable);
S7: myRef := REF(#variable);
Beckhoff: myRef REF= variable;

INPUT:
variable : TYPE_ANY [1:1]

RETURN TYPE:
TYPE_ANY

Return:

TYPE_ANY

Parameters:

variable : TYPE_ANY

isValid

Use isValid operator to check if reference is set.
B&R: TRUE (test not supported)
S7: myRef <> NULL
Beckhoff: __ISVALIDREF(myRef)

INPUT:
variable : TYPE_ANY [1:1]

RETURN TYPE:
BOOL

Return:

BOOL

Parameters:

variable : TYPE_ANY