436
FX
3G
/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
3) Example of connecting one seven-segment display unit
The figure below shows an example of the FX
3U
series main unit (sink output).
For wiring details, refer to the following manuals.
→
FX
3G
Hardware Edition
→
FX
3U
Hardware Edition
→
FX
3UC
Hardware Edition
When using two sets of 4 digits (n = K4 to K7)
→
For selection of "n", refer to Subsection 15.5.2.
1) Data and strobe signal
a) 1st set of 4 digits
A 4-digit numeric value stored in
is converted from binary into BCD, and its each digit is output in turn
from
to
+3 by the time division method.
The strobe signal is output in turn from
+4 to
+7 by the time division method also to latch the first
set of 4-digit seven-segment display unit.
b) 2nd set of 4 digits
A 4-digit numeric value stored in
+1 is converted from binary into BCD, and its each digit is output in
turn from
+10 to
+13 by the time division method.
The strobe signal is output in turn from
+4 to
+7 by the time division method also to latch the
second set of 4-digit seven-segment display unit. (The strobe signal outputs
+4 to
+7 are shared
by the 1st and 2nd sets.)
2) For
and
+1, binary data ranging from 0 to 9999 is valid.
3) Example of connecting two seven-segment display units
The figure below shows an example of the FX
3U
series main unit (sink output).
For wiring details, refer to the following manuals.
→
FX
3G
Hardware Edition
→
FX
3U
Hardware Edition
→
FX
3UC
Hardware Edition
10
0
4
2
8
1
1
2
4
8
1st set
V+
10
1
10
2
10
3
10
3
10
2
10
1
10
0
COM
+1
+2
+3
+4
+6
+7
+5
PLC (transistor output type)
D
D
D
D
D
D
D
D
S
D
D
D
D
S
D
D
D
D
D
D
S
S
10
0
4
2
8
1
1
2
4
8
1st set
V+
10
1
10
2
10
3
10
3
10
2
10
1
10
0
COM
+1
PLC
(transistor output type)
+2
+3
+4
+6
+7
+5
D
D
D
D
D
D
D
D
2nd set
V+
1
2
4
8
4
2
8
1
10
3
10
2
10
1
10
0
+10
+11
+12
+13
D
D
D
D
COM
