Boolean Conversion

NOTICE

String manipulation when converting to ‎STRING‎ or ‎WSTRING‎

When converting the type to ‎STRING‎ or ‎WSTRING‎, the typed value is left-aligned as a character string and truncated if it is too long. Therefore, declare the return variable for the type conversion operators ‎<>_TO_STRING‎ and ‎<>_TO_WSTRING‎ long enough that the character string has enough space without any manipulation.

The operators convert a Boolean value into the specified data types and return a type-converted value.

Call syntax

<variable name> := <BOOL to operator> ( <operand> );
<operand> = <variable name> | <literal>

Operators

BOOL_TO___UXINT
BOOL_TO___XINT
BOOL_TO___XWORD
BOOL_TO_BIT
BOOL_TO_BYTE
BOOL_TO_DATE
BOOL_TO_DINT
BOOL_TO_DT
BOOL_TO_DWORD
BOOL_TO_INT
BOOL_TO_LDATE
BOOL_TO_LDT
BOOL_TO_LINT
BOOL_TO_LREAL
BOOL_TO_LTIME
BOOL_TO_LTOD
BOOL_TO_LWORD
BOOL_TO_REAL
BOOL_TO_SINT
BOOL_TO_STRING
BOOL_TO_TIME
BOOL_TO_TOD
BOOL_TO_UDINT
BOOL_TO_UINT
BOOL_TO_ULINT
BOOL_TO_USINT
BOOL_TO_WORD
BOOL_TO_WSTRING

When the operand value is ‎TRUE‎, the following typed values are returned:

‎BOOL_TO_DATE‎: ‎D#1970-1-1 // The zeroth bit is set, but does not effect the display.‎
‎BOOL_TO_DT‎: ‎DT#1970-01-01-0:0:1‎
‎BOOL_TO_LTIME‎: ‎LTIME#1NS‎
‎BOOL_TO_REAL‎: ‎'1'‎
‎BOOL_TO_STRING‎: ‎'TRUE'‎
‎BOOL_TO_TOD‎: ‎TOD#0:0:0.001‎
‎BOOL_TO_TIME‎: ‎T#1MS‎
‎BOOL_TO_WSTRING‎: ‎"TRUE"‎

When the operand value is ‎FALSE‎, the following typed values are returned:

‎BOOL_TO_DATE‎: ‎D#1970-1-1‎
‎BOOL_TO_DT‎: ‎DT#1970-01-01-00:00:00‎
‎BOOL_TO_LTIME‎: ‎LTIME#0NS‎
‎BOOL_TO_REAL‎: ‎'0.0'‎
‎BOOL_TO_STRING‎: ‎'FALSE'‎
‎BOOL_TO_TOD‎: ‎TOD#0:0:0‎
‎BOOL_TO_TIME‎: ‎T#0MS‎
‎BOOL_TO_WSTRING‎: ‎"FALSE"‎

Examples

ST implementation language

FUNCTION_BLOCK FB_ConvertFromBool
VAR
VAR
	uxiReturn_1: __UXINT;
	uxiReturn_10: __UXINT;
	iReturn_2: __XINT;
	iReturn_20: __XINT;
	xwReturn_3: __XWORD;
	xwReturn_30: __XWORD;
	bitReturn_4: BOOL;
	bitReturn_40: BOOL;
	bReturn_6: BYTE;
	bReturn_60: BYTE;
	dateReturn_7: DATE;
	dateReturn_70: DATE;
	dtReturn_8: DATE_AND_TIME;
	dtReturn_80: DATE_AND_TIME;
	diReturn_9: DINT;
	diReturn_90: DINT;
	dtReturn_10: DATE_AND_TIME;
	dtReturn_100: DATE_AND_TIME;
	dwReturn_11: DWORD;
	dwReturn_110: DWORD;
	iReturn_12: INT;
	iReturn_120: INT;
	liReturn_13: LINT;
	liReturn_130: LINT;
	lrReturn_14: LREAL;
	lrReturn_140: LREAL;
	lwReturn_15: LWORD;
	lwReturn_150: LWORD;
	rReturn_16: REAL;
	rReturn_160: REAL;
	siReturn_17: SINT;
	siReturn_170: SINT;
	sReturn_18: STRING;
	sReturn_180: STRING;
	todReturn_19: TIME_OF_DAY;
	todReturn_190: TIME_OF_DAY;
	timReturn_20: TIME;
	timReturn_200: TIME;
	todReturn_21: TIME_OF_DAY;
	todReturn_210: TIME_OF_DAY;
	udiReturn_22: UDINT;
	udiReturn_220: UDINT;
	uiReturn_23: UINT;
	uiReturn_230: UINT;
	uliReturn_24: ULINT;
	uliReturn_240: ULINT;
	usiReturn_25: USINT;
	usiReturn_250: USINT;
	wReturn_26: WORD;
	wReturn_260: WORD;
	wsReturn_27: WSTRING;
	wsReturn_270: WSTRING;
END_VAR

// Return value of operand = TRUE or FALSE
uxiReturn_1 := BOOL_TO___UXINT(TRUE);
uxiReturn_10 := BOOL_TO___UXINT(FALSE);

iReturn_2 := BOOL_TO___XINT(TRUE);
iReturn_20 := BOOL_TO___XINT(FALSE);

xwReturn_3 := BOOL_TO___XWORD(TRUE);
xwReturn_30 := BOOL_TO___XWORD(FALSE);

bitReturn_4 := BOOL_TO_BIT(TRUE);
bitReturn_40 := BOOL_TO_BIT(FALSE);

bReturn_6 := BOOL_TO_BYTE(TRUE);
bReturn_60 := BOOL_TO_BYTE(FALSE);

dateReturn_7 := BOOL_TO_DATE(TRUE);
dateReturn_70 := BOOL_TO_DATE(FALSE);

dtReturn_8 := BOOL_TO_DT(TRUE);
dtReturn_80 := BOOL_TO_DT(FALSE);

diReturn_9 := BOOL_TO_DINT(TRUE);
diReturn_90 := BOOL_TO_DINT(FALSE);

dwReturn_11 := BOOL_TO_DWORD(TRUE);
dwReturn_110 := BOOL_TO_DWORD(FALSE);

iReturn_12 := BOOL_TO_INT(TRUE);
iReturn_120 := BOOL_TO_INT(FALSE);

liReturn_13 := BOOL_TO_LINT(TRUE);
liReturn_130 := BOOL_TO_LINT(FALSE);

lrReturn_14 := BOOL_TO_LREAL(TRUE);
lrReturn_140 := BOOL_TO_LREAL(FALSE);

lwReturn_15 := BOOL_TO_LWORD(TRUE);
lwReturn_150 := BOOL_TO_LWORD(FALSE);

rReturn_16 := BOOL_TO_REAL(TRUE);
rReturn_160 := BOOL_TO_REAL(FALSE);

siReturn_17 := BOOL_TO_SINT(TRUE);
siReturn_170 := BOOL_TO_SINT(FALSE);

sReturn_18 := BOOL_TO_STRING(TRUE);
sReturn_180 := BOOL_TO_STRING(FALSE);

timReturn_20 := BOOL_TO_TIME(TRUE);
timReturn_200 := BOOL_TO_TIME(FALSE);

todReturn_21 := BOOL_TO_TOD(TRUE);
todReturn_210 := BOOL_TO_TOD(FALSE);

udiReturn_22 := BOOL_TO_UDINT(TRUE);
udiReturn_220 := BOOL_TO_UDINT(FALSE);

uiReturn_23 := BOOL_TO_UINT(TRUE);
uiReturn_230 := BOOL_TO_UINT(FALSE);

uliReturn_24 := BOOL_TO_ULINT(TRUE);
uliReturn_240 := BOOL_TO_ULINT(FALSE);

usiReturn_25 := BOOL_TO_USINT(TRUE);
usiReturn_250 := BOOL_TO_USINT(FALSE);

wReturn_26 := BOOL_TO_WORD(TRUE);
wReturn_260 := BOOL_TO_WORD(FALSE);

wsReturn_27 := BOOL_TO_WSTRING(TRUE);
wsReturn_270 := BOOL_TO_WSTRING(FALSE);

FBD implementation language