Delta DVP-ES2 User Manual
Page 441
3 . I n s t r u c t i o n S e t
3 - 3 2 5
API Mnemonic Operands
Function
135
D ATAN P
Arc Tangent
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Bit Devices
Word devices
Program Steps
Type
OP
X Y
M S K H KnX KnY KnM KnS T C D E F
S
*
*
*
D
*
DATAN, DATANP: 9
steps
PULSE 16-bit 32-bit
ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2
Operands:
S: Source device (binary floating value) D: Operation result
Explanations:
1.
ATAN instruction performs arc tangent operation on S and stores the result in D
2. ATAN
value=TAN
-1
3.
See the figure below for the relation between the input and the result:
R
S
2
2
-
0
S: Input (TAN value)
R: Result (ATAN value)
4.
If operation result in D is 0, Zero flag M1020 = ON.
Program Example:
When X0 = ON, DATAN instruction performs arc tangent operation on the binary floating value in
(D1, D0) and stores the ATAN value in (D11, D10) in binary floating format.
DATAN
X0
D0
D10
D1
D0
D11
D10
ATAN value
Binary floating point
binary floating point