Eaton ELC-PB, Programming Manual

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3 . I n s t r u c t i o n S e t
M N 0 5 0 0 3 0 0 3 E F o r m o r e i n f o r m a t i o n v i s i t : w w w. e a t o n . c o m
3 - 3 2 3
API Mnemonic Operands Function
135 D ATAN P S, D Floating Point Arctangent Operation
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
ELC ELCB ELCM
PB PC/PA/PH PV PB PH/PA
32 16 P 32 16 P 32 16 P 32 16 P 32 16 P
Operands:
S : Specified source (binary floating point) D : Area where calculated result is stored
Description:
1. ATAN value=TAN
-1
2. See the figure below for the relation between radian and result:
S: Radian
R: Result
R
S
2
2
-
0
3. If the result of D is 0, the zero flag M1020=ON.
Program Example:
When X0= ON, calculate the ATAN of the binary floating point value (D1, D0) and save the result in
(D11, D10). The result stored in (D11, D10) is in binary floating point format.
DATAN
X0
D0 D10
D1 D0
D11 D10
ATAN value
Binary floating point
binary floating point