Rockwell Automation 5370-CVIM2 Module - Manual (Page 359)

5 Chapter Chapter 7
Inspection Tools
7–121
asin –– The “ asin ” (arc sine) function calculates an arc sine (angle) on the
basis of the sine value that you enter after the opening parenthesis. Thus, if
you enter
asin(.707) as a standalone formula, and then pick the Nominal
field in the tool edit panel, 44.991 (the arc sine of 0.707) will appear in the
Nominal field. Similarly, if you enter asin(–.707) , –44.991 will appear.
Note that the acceptable range of arc sine values is 0.0 to
"1.0. If you enter
a value greater than 1.0, the Nomina l field will display an “ Out of domain. ”
message box, which indicates that the value cannot be used.
cos –– The “ cos ” (cosine) function calculates the cosine of the angle that
you enter after the opening parenthesis. Thus, if you enter cos(60) as a
standalone formula, and then pick the Nominal field in the tool edit panel,
0.500 (the cosine of 60
°) will appear in the
Nominal field.
Here are some examples that illustrate cosine function results for other
angles:
•
cos(120) = –0.500
•
cos(240) = –0.500
•
cos(300) = 0.500
In a typical application, the cosine function would likely be used to express
the cosine of an angle returned from a tool operation, such as this:
cos({Tool1.Theta})
acos –– The “ acos ” (arc cosine) function calculates the arc cosine (angle) on
the basis of the cosine value that you enter after the opening parenthesis.
Thus, if you enter
acos(.5) as a standalone formula, and then pick the
Nominal field in the tool edit panel, 60.000 (the arc cosine of 0.500) will
appear in the Nominal field. Similarly, if you enter acos(–.5) , 120.000 will
appear.
Note that the acceptable range of arc cosine values is 0.0 to
"1.0. If you
enter a value greater than 1.0, the Nomina l field will display an “ Out of
domain. ” message box, which indicates that the value cannot be used.
tan –– The “ tan ” (tangent) function calculates the tangent of the angle that
you enter after the opening parenthesis. Thus, if you enter tan(30) as a
standalone formula, and then pick the Nominal field in the tool edit panel,
0.577 (the tangent of 30
°) will appear in the
Nominal field.
Here are some examples that illustrate tangent function results for other
angles:
•
tan(90) = 353013952228677
•
tan(180) = –0.000
In a typical application, the tangent function would likely be used to express
the tangent of an angle returned from a tool operation, such as this:
tan({Tool1.Theta})