123
4
4 Instructions 4.4.3 Trigonometric Functions
◆
Function
The tangent of the designated angle (measured in radians) is calculated. The variable is in binary oating-
point number format.
Example:
ǒDTAN D20 D30Ǔ
X2
DS
The tangent of the angle measured in radians in (D21, D20)
is calculated. The result is stored in (D31, D30).
The source data and TAN operation result are in binary oating-point number format.
According to the equation Angle in radians = Angle in degrees x π/180°, an angle of 360° is converted to
radians as follows: 360° x π/180° = 2π.
For details about the programming statement for calculating the tangent in degrees, see the example
described in
“SIN: Floating point SIN operation” on Page 120
.
ASIN: Binary oating point ARCSIN operation
◆
Overview
The ASIN instruction calculates the sine in radians.
ASIN S D
Binary oating point
ARCSIN operation
Applicable model:
H3U
S
Data
source
Binary oating-point variable whose arcsine is to be
calculated
32-bit instruction
(9 steps)
DASIN: Continuous
execution
DASINP: Pulse
execution
D
Operation
result
Operation result storage unit (in the range –π/2 to +π/2)
◆
Operands
Operand
Bit Element Word Element
System·User System·User Bit Designation Indexed Address Constant
Real
Number
S X Y M T C S SM D R T C SD KnX KnY KnM KnS KnSM
V,Z
Modication K H E
D X Y M T C S SM D R T C SD KnX KnY KnM KnS KnSM
V,Z
Modication K H E
Note: The elements in gray background are supported.
◆
Function
The sine in radians is calculated.
Note: An operation error will occur if the value in S exceeds the range –1.0 to +1.0. The error code is K6706
and stored in D8067. The error ag M8067 is set to ON to identify this error.
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