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13 Examples of Wiring for Various Uses
124
FX
3S
 Series Programmable Controllers
User's Manual - Hardware Edition
13.4 Seven Segment with Latch [SEGL Instruction (FNC 74)/ BCD Instruction (FNC 18)]
13.4.2 When BCD instruction (FNC 18) is used
This subsection gives examples of wiring for displaying the current value of D100 on the 2-digit 7-segment
display.
Example of program
Example of wiring
1) In the case of sink wiring
2) In the case of source wiring
D100
K2Y006
M8000
FNC 18
BCD
RUN
monitor
1
2
4
8
1
2
4
Y007
Y006
Y010 Y011 COM4 Y012 Y013
Y015
8
1 2 4 8
1 2 4 8
Transistor output (sink)
Signal
Internal
circuit
-
7-segment display
+
Y
COM1
PLC
COM3
7-segment display to be used for sink wiring 
(in the case of transistor output)
Main unit (Example: FX
3S
-30MT/ES)
Y014
Y007
Y006
Y010 Y011
+V4
Y012 Y013
Y015
Transistor output (source)
Signal
Internal
circuit
-
7-segment display
+
+V0
Y
PLC
+V3
7-segment display to be used for source 
wiring (in the case of transistor output)
Main unit (Example: FX
3S
-30MT/ESS)
Y014
1
2
4
8
1
2
4
8
1 2 4 8
1 2 4 8