Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 496)

L-force | PLC Designer
IEC Operators and additional norm extending functions
494 DMS 3.2 EN 02/2011 TD29

9.9.8 STRING_TO Conversions
Converting from the variable type STRING to a different type:
The operand from the STRING type variable must contain a value that is valid in the
target variable type, otherwise the result will be 0.
Examples in IL:
LD 'TRUE'
STRING_TO_BOOL
ST b (* Result is TRUE *)
LD 'abc34'
STRING_TO_WORD
ST w (* Result is 0 *)
LD 't#127ms'
STRING_TO_TIME
ST t (* Result is T#127ms *)
Examples in ST:
b :=STRING_TO_BOOL('TRUE'); (* Result is TRUE *)
w :=STRING_TO_WORD('abc34'); (* Result is 0 *)
t :=STRING_TO_TIME('T#127ms'); (* Result is T#127ms *)
Examples in FBD: