Delta Electronics AH500, Manual

Page: 214 / 547

C h a p t e r 5 A p p l i e d I n s t r u c t i o n s
5 - 9 9
API Instruction code Operand Function
135 D ATAN P S, D
Arctangent of a binary
floating-point number
Device X Y M S K 16# F KnM KnS D W T C V Z
S

 
D
 
Pulse instruction 16-bit instruction 32-bit instruction (6 steps)

–

E xp la nat io n

Arctangent value=tan
-1

S : Source value (binary floating-point value); D : Arctangent value
The relation between tangent values and arctangent values is shown
below.
R
S
2
2
-
0
S: Ta ngent v alue
R: Arc tan gent va lu e

If a conversion result is 0, a zero flag will be ON.

SM1064 is the zero flag in an Ox motion subroutine, and SM968 is the
zero flag in O100.
E xa mple

When X0.0 is ON, the arctangent of the binary floating-point value in
(D1, D0) is stored in (D11, D10).
X0.0
DATAN
D0 D10
Binary floating- point value
Binary floating- point value
D 1 D 0
S
D
D 11 D 10
Ar ctangent value
A dditio nal

re m ark
Please refer to section 5.3 for more information about performing
operations on floating-point numbers.