Arc Sine: Asin - Omron CQM1H - PROGRAM Programming Manual

Floating-point Math Instructions
Flags
5-24-14 ARC SINE: ASIN(––)
Limitations
Description
ER: Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
ON if the source data is not recognized as floating-point data.
ON if the absolute value of the source data exceeds 65,535.
EQ: ON if both the exponent and mantissa of the result are 0.
Ladder Symbols
ASIN(−−) @ASIN(−−)
S
R
000
The source data in S+1 and S must be in IEEE754 floating-point data format.
DM 6143 to DM 6655 cannot be used for R.
ASIN(––) calculates the arc sine of a 32-bit floating-point number and places
the result in the specified result words. (The arc sine function is the inverse of
the sine function; it returns the angle that produces a given sine value
between –1 and 1.)
When the execution condition is OFF, ASIN(––) is not executed. When the
execution condition is ON, ASIN(––) computes the angle (in radians) for a
sine value expressed as a 32-bit floating-point number in S+1 and S and
places the result in R+1 and R. (The floating point source data must be in
IEEE754 format.)
–1
SIN S+1
R+1
The source data must be between –1.0 and 1.0. If the absolute value of the
source data exceeds 1.0, an error will occur and the instruction won't be exe-
cuted.
The result is output to words R+1 and R as an angle (in radians) within the
range of – π /2 to π /2.
IR, SR, AR, DM, EM, HR, TIM/CNT, LR
S
IR, SR, AR, DM, EM, HR, LR
R
Third operand: Always 000
000
Source (32-bit floating-point data)
S
Result (32-bit floating-point data)
R
Section 5-24
Operand Data Areas
S: First source word
R: First result word
−−−
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