417
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15.6 FNC 75 – ARWS / Arrow Switch
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
Explanation of function and operation
Four arrow switches are connected to the inputs
to
+3, a seven-segment display unit having the
BCD decoder is connected to the outputs
to
+7, and a numeric value is input to
.
1. 16-bit operation (ARWS)
actually stores a 16-bit binary value in the range from 0 to 9999, but the value is expressed in the BCD
format in the explanation below for convenience.
When the command input is set to ON, ARWS instruction executes the following operation.
Contents of the display and operation part
1) Specifying the number of digits of the seven-segment display unit having the BCD decoder n
In the explanation below, "n" is set to "4" (up to the 10
3
digit).
2) Operation of the digit selection switches (
+2 and
+3)
- Operation when the lower digit input
+2 turns ON
Every time the lower digit switch is pressed, the digit specification changes in the way "10
3
→
10
2
→
10
1
→
10
0
→
10
3
".
- Operation when the higher digit input
+3 turns ON
Every time the higher digit switch is pressed, the digit specification changes in the way "10
3
→
10
0
→
10
1
→
10
2
→
10
3
".
3) Operation of the LED for displaying a selected digit (
+4 to
+7)
A specified digit can be displayed by the LED offered by the strobe signals
+4 to
+7.
S
S
D
2
D
2
D
1
D
1
Command
input
FNC 75
ARWS
n
D
1
S
D
2
Display/operation panel
1
2
4
8
10
0
10
1
10
2
10
3
←
Display for
selected digit
Decrement
Increment
Higher
digit
Lower
digit
+3
+7
+2
+4
+6
+5
+3
+1
Seven-segment display unit
Equipped with the latch function so that a
numeric value being set can be seen.
Arrow switches
Provided to select a digit and increment or
decrement the numeric value in the selected digit.
St
robe
out
put
N
u
me
ri
c va
lu
e
out
put
Swi
tc
h
es
+2
+3
+1
To outputs in
PLC
To outputs in
PLC
To inputs in
PLC
+1
+2
S
S
S
S
D
2
D
2
D
2
D
2
D
2
D
2
D
2
D
2
S
S
S
S
S
S
S
S
D
2
D
2
D
2
D
2