Lenze DDS v2.3 - Manual (Page 295)

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IEC 61131-3 Standard functions
14-3
l
DDS EN 2.3
14.1.3 TO_BOOL
Converting from any type to BOOL
•
The result is TRUE if the operand is not 0 and FALSE if the operand is 0.
•
With type STRING the result is TRUE if the operand is TRUE, otherwise the result is FALSE.
Examples
IL
LD 213
BYTE_TO_BOOL
ST b (* b=TRUE *) LD 0
INT_TO_BOOL
ST b (* b=FALSE *) LD T#5ms
TIME_TO_BOOL
ST b (* b=TRUE *)
LD ’TRUE’
STRING_TO_BOOL
ST b (* b=TRUE *)
ST
b:=BYTE_TO_BOOL(2#11010101);
b:=INT_TO_BOOL(0);
b:=TIME_TO_BOOL(T#5ms);
b:=STRING_TO_BOOL(’TRUE’); (* b=TRUE *)
(* b=FALSE *)
(* b=TRUE *)
(* b=TRUE *)
FBD
14.1.4 TIME_TO / TIME_OF_DAY
Converting from TIME or TIME_OF_DAY to another type
Internally, the time is saved as a DWORD in milliseconds (with TIME_OF_DAY from 00:00 o’clock). This
value is converted.
•
With type STRING, the result is the time constant.
•
Conversion from higher- to lower-order types may result in information loss.
Examples
IL
LD T#12ms
TIME_TO_STRING
ST str LD T#300000ms
TIME_TO_DWORD
ST dw LD TOD#00:00:00.012
TOD_TO_SINT
ST si
ST
str:=TIME_TO_STRING(T#12ms);
dw:=TIME_TO_DWORD(T#5m);
si:=TOD_TO_SINT(TOD#00:00:00.012); (* str=’T#12ms’ *)
(* dw=300000 *)
(* si=12 *)
FBD
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