503
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.23 FNC135 – ATAN / Floating Point Arc Tangent
11
FN
C30-
FN
C39
R
o
ta
tion and
Sh
ift
12
FNC
4
0
-FNC49
D
a
ta
Op
e
ra
tio
n
13
FNC5
0
-FNC5
9
H
igh Speed
Pr
ocessi
ng
14
FM
C6
0
-F
NC6
9
H
and
y
In
st
ru
cti
o
n
15
FNC7
0
-FNC7
9
Ex
te
rn
a
l F
X
I
/O
D
evi
ce
16
FNC8
0
-FNC8
9
Ext
e
rnal
FX
D
evi
ce
17
F
N
C1
00
-F
NC
10
9
Da
ta
Tr
ansf
e
r 2
18
FN
C
110-FN
C
13
9
Fl
oat
ing P
o
in
t
19
FN
C
140-FN
C
149
Da
ta
O
per
at
io
n
2
20
FN
C
15
0-F
N
C
159
P
o
si
tioni
ng
C
ont
ro
l
Program example
In the program example shown below, the TAN
−
1
value of data (binary floating point) stored in D0 and D1 is
calculated, and the angle is output in 4-digit BCD to Y040 to Y057 when X000 turns ON.
Operation when "1" is stored in D0 and D1
The angle expressed in binary floating point (real
number) is converted into an integer (binary) ([3]).
X000
FNC137
DDEG
D10
The angle (in radian) is calculated by the TAN
−
1
operation ([1]).
The value in radian is converted into the value in
degree ([2]).
D20
FNC135
DATAN
D0
D10
FNC129
INT
D20
D30
The angle expressed in integer (binary) is output to
the display unit ([4]).
FNC 18
BCD
D30
K4Y40
END
Binary floating point
(real number) value
1
D1
D0
[1]
Conversion
by TAN
−
1
operation
Binary floating point
(real number) value
0.785398
D11
D10
DATAN
Binary floating point
(real number) value
45
D21
D20
[3]
Conversion
into binary
45
b15
b0
D30
Binary
value
[4] BCD
operation
BCD
0 0 4 5
Y057 Y040
BCD
value
DDEG
[2] Conversion into degree
INT
Содержание FX3U Series
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