West Control Solutions KS98-1 - Manual (Page 100)

III-3 Trigonometric functions
III-3.1 SIN (sinus function (No. 80))
y x
1
sin 1) =
(
The function provides the sinus of the input value, i.e. x1 is the angle the sinus of which is calculated.
Parameter Select is used to adjust, if the angle is provided in degree of angle [°] or in radian.
The calculation clarity can be reached by limiting the input signal (e.g. to the 1st or 4th quadrant ( _90° / _ ó /
2
)). Inter-
nal limiting is not provided. If input value x1 is out of the range in which the sinus function can still provide purpose-
ful values, output y1 is set to 1,5 w 10 37 .
Example degree of angle:
y1= sin(x1) x1 = 30°
= y1 = 0,5
Example radian:
y1= sin(x1) x1 = 90rad
= y1 = 0,89399666
Parameter Description Controller display
Select
Unit: degree of angle (default) Ang. deg
Unit: radian Radian
1 rad = 180°/у = 57,296°
1 ° = у/180° = 0,017453 rad
Control with the pocket calculator:
The function for the calculation in "rad" with the pocket calculator is limited to e.g. ±8 ó.
r 90/ ó = 28,6479: sin ( 0,6479 w ó) = 0,893996664
Also during input in "°" usually a limitation is effective in the pocket calculator (e.g. < 1440°)!
III-3.2 COS (cosinus function (No. 81))
y x
1
cos 1) =
(
The function provides the cosinus of the input value, i.e. x1 is the angle the cosinus of which is calculated.
Parameter Select is used to adjust, if the angle is provided in degree of angle [°] or in radian.
9499-040-82711 Trigonometric functions
SIN (sinus function (No. 80)) III-100
x1 y1
Select
(y1) = sin (x1)
x1 y1
Select
(y1) = cos (x1)