Mitsubishi Electric MELSEC FX3U Programming Manual page 451

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. Connection diagram
The figure below shows an example of the FX
For wiring details, refer to the following manuals.
BCD type
digital
switch
Diode of
0.1 A, 50 V
is required.
24V 0V S/S X010 X011 X012 X013
COM3 Y010 Y011 Y012 Y013
3. Timing chart
X000
Y010
0.1 sec
Y011
0.1 sec
Y012
Y013
M8029 Complete flag
While X000 is ON, Y010 to Y013 turn ON in turn at every 100 ms. After one cycle is finished, the execution
complete flag M8029 turns ON.
4. How to use this instruction in a relay output type PLC
By providing a "digital switch read input", this instruction can be used in a relay output type PLC.
When the push button switch (X000) is pressed, DSW (FNC 72) instruction executes a series of operations.
Accordingly, with regard to this program, it is not necessary to consider the relay contact life even if Y010 to
Y013 are relay outputs.
X000
SET
M 0
FNC 72
DSW
M8029
RST
1) While M0 (digital switch read input) is ON, DSW (FNC 72) is driven.
2) DSW (FNC 72) completes one cycle of operation, and remains driven until the execution complete flag
(M8029) turns ON.
3U
10 0 10 1
1 2 4 8
Inputs of first set
10 0 10 1 10 2 10 3
Repeated
operation 0.1 sec 0.1 sec
Pause
0.1 sec
0.1 sec
M 0
X010 Y010 D 0
M 0
15 External FX I/O Device – FNC 70 to FNC 79
15.3 FNC 72 – DSW / Digital Switch (Thumbwheel Input)
series main unit (sink input/sink output).
10 2 10 3
1 2 4 8
X014 X015 X016 X017
Inputs of second set
PLC
K 1
→ FX
Hardware Edition
3G
→ FX
Hardware Edition
3U
→ FX
Hardware Edition
3UC
10 0
To
1
10
second
10 2
set
3
10
BCD type
digital
switch
1
To
2
second
3
set
4
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