FE MONITOUCH V8 SERIES, Ссылка: Дополнительные функции

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23 Macro
23-8
F0 = ASIN (F1) (F). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FLOAT
Function: Arcsine
This macro command is used to store an arcsine of the angle (in radians) specified for [F1] in [F0].
Specify values for [F0] and [F1] in the format of decimal floating-point data (FLOAT).
Available memory
: Setting enabled (indirect designation disabled)
: Setting enabled (indirect designation enabled)
Range
Example
• To obtain the value for sin
-1
1;
$u100 = ASIN (1) (F)
The operation result of
“1.570796” (=
π
/2) is stored in
$u100.
Supplementary information
• $s1056 stores the result of macro execution.
*1 An indefinite value is stored in [F0].
*2 When the value specified for [F1] is outside the range from “-1” to “1”, “-1” is stored in [F0].
• To convert the unit of an angle, use the macro command of DEG (page 23-11) or RAD (page
23-12).
Internal Memory
PLC1 - PLC8
Memory
Memory Card Constant
F0
F1
Value
F0
IEEE 32-bit single precision real number
F1
Code (DEC) Contents
0 Normal
1 Overflow
*1
2 Underflow
*1
3 Operation execution error
*2
F1+1 F1 F0+1 F0
FLOAT FLOAT
SIN
-1
The sin
-1
of the trigonometric functions is
expressed in the graph shown below.
2
2
-1
-1
1
1
0
X axis
Y axis