Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Pobierz pdf (Strona 490)

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IEC Operators and additional norm extending functions

488 DMS 3.2 EN 02/2011 TD29 

9.9.3 TO_BOOL Conversions

Conversion from another variable type to BOOL:

The result is TRUE when the operand is not equal to 0. The result is FALSE when the

operand is equal to 0. The result is true for STRING type variables when the operand is

"TRUE", otherwise the result is FALSE.

Examples in IL:

BYTE_TO_BOOL

(*Result is TRUE *)

(*Result is FALSE *)

TIME_TO_BOOL

(*Result is TRUE *)

STRING_TO_BOOL

(*Result is TRUE *)

Examples in FUP:

(*Result is TRUE *)

(*Result is FALSE *)

(*Result is TRUE *)

Examples in St:

b := BYTE_TO_BOOL(2#11010101); (* Result is TRUE *)

b := INT_TO_BOOL(0); (* Result is FALSE *)

b := TIME_TO_BOOL(T#5ms); (* Result is TRUE *)

b := STRING_TO_BOOL('TRUE'); (* Result is TRUE *)

Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Strona 490