413
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15.5 FNC 74 – SEGL / Seven Segment With Latch
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
Related devices
→
For the instruction execution complete flag use method, refer to Subsection 6.5.2.
Cautions
1. Time to update the 4-digit seven-segment display
The scan time (operation cycle) multiplied by 12 is required to update (one or two sets of) the 4-digit display.
2. Operation when the command input turns OFF
While the command input is ON, the operation is repeated.
When the command contact is set to OFF in the middle of a series of operation, the operation is paused.
When the command contact is set to ON again, the operation is started from the beginning.
3. Number of occupied devices
When one set of 4 digits is used:
1 device is occupied from the head device specified in
.
8 devices are occupied from the head device specified in
. Even if
the number of digits is smaller than 4, unused devices cannot be used
for any other purpose.
When two sets of 4 digits are used: 2 devices are occupied from the head device specified in
.
Twelve devices are occupied from the head device specified in
.
Even if the number of digits is smaller than 4, unused devices cannot be
used for any other purpose.
4. Scan time (operation cycle) and the display timing
SEGL instruction is executed in synchronization with the scan time (operation cycle) of the PLC.
For achieving a series of display, the scan time of the PLC should be 10 ms or more.
If the scan time is less than 10 ms, use the constant scan mode so that the scan time exceeds 10 ms.
5. Output type of the PLC
Use a transistor output type PLC.
Device
Name
Description
M8029
Instruction execution
complete flag
Turns ON when output of 4 digits is finished.
S
D
S
D