461
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.1 FNC110 – ECMP / Floating Point Compare
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
• When a constant (K or H) is specified as [
+1,
] or [
+1,
], it is automatically
converted from binary into binary floating point (real number) when the instruction is executed.
Caution
1. Number of occupied devices
Three devices are occupied from
(
,
+1 and
+2).
Make sure that these devices are not used for any other purpose.
S
1
S
1
S
2
S
2
Command
input
FNC110
DECMP
Even if the command input turns OFF and DECMP instruction is not executed, to +2 hold the status
before the please rewrite this command input turned OFF.
+1
+2
S
1
S
2
D
D
D
D
D
D
Turns ON in the case of
<
+1,
]
S
1
S
1
+1,
[ S
2
S
2
" [
] ".
Turns ON in the case of
=
+1,
]
S
1
S
1
+1,
[ S
2
S
2
" [
] ".
Turns ON in the case of
>
] ".
+1,
" [
]
S
1
S
1
+1,
[ S
2
S
2
D
D
D
D
