397
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
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
15. External FX I/O Device – FNC 70 to FNC 79
FNC 70 to FNC 79 provide instructions to receive data from and send data to external devices mainly using
inputs and outputs in PLCs.
Because these instructions easily achieve complicated controls with a minimum required sequence program
and external wiring, they are similar to handy instructions described in the preceding chapter.
FROM and TO instructions essential for controlling special units and special blocks are included in this group.
(In FX
3U
and FX
3UC
PLCs, transfer can be executed also by MOV instruction.)
FNC No.
Mnemonic
Symbol
Function
Reference
70
TKY
Ten Key Input
Section
15.1
71
HKY
Hexadecimal Input
Section
15.2
72
DSW
Digital switch (thumbwheel input)
Section
15.3
73
SEGD
Seven Segment Decoder
Section
15.4
74
SEGL
Seven Segment With Latch
Section
15.5
75
ARWS
Arrow Switch
Section
15.6
76
ASC
ASCII code data input
Section
15.7
77
PR
Print (ASCII Code)
Section
15.8
78
FROM
Read From A Special Function Block
Section
15.9
79
TO
Write To A Special Function Block
Section
15.10
TKY
D1 D2
S
D3
HKY
D2
D1
S
n
DSW
D2
D1
S
D
S
SEGD
SEGL
D n
S
n
ARWS
D2
D1
S
D
ASC
S
D
S
PR
n
FROM
D
m2
m1
n
TO
S
m2
m1
