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Mitsubishi Electronics FX3G User Manual

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FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
 Series
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.6 Program Memory and Devices
1
Introdu
ction
2
Ov
ervi
ew
3
Instruction 
Li
st
4
D
evices 
in Det
ai
l
5
Specifi
ed the
De
vice
 &
 
C
onst
ant
6
Bef
ore
 
Pr
og
ra
mmi
ng
7
Bas
ic 
Instruction
8
FN
C00-FN
C0
9
Program Fl
ow
9
FNC
10-FN
C19
Mov
e & Com
pare
10
FNC
20-FNC
29
Arith. & Lo
gi
c 
Operati
on
3) Types of bit device memory
a) FX
3S
 PLC
*1.
Some devices are cleared when the PLC status switches from STOP to RUN.
→ For special data registers, refer to Chapter 37.
Item
Power OFF
Power 
OFF
→ON
STOP
→RUN
RUN
→STOP
Contact image 
memory 
(X, Y, M, S)
Input relay (X)
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
Output relay (Y)
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
General type auxiliary relay (M)
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
Latched (EEPROM backed) type
auxiliary relay (M)
Does not change.
Special type auxiliary relay (M)
Cleared.
Set to initial 
values.
*1
Does not change.
*1
General type state relay (S)
Cleared.
Does not change.
Latched (EEPROM backed) type
state relay (S)
Does not change.
Timer contact
Time counting coil
Reset coil (T)
For 100 ms
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
For 10 ms
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
For 1 ms
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
Retentive type for 100 ms
Does not change.
Retentive type for 1 ms
Does not change.
Counter contact
Counting coil
Reset coil (C)
General type
Cleared.
Does not 
change.
Cleared.
Does not change while M8033 is 
ON.
Latched (EEPROM backed) type
Does not change.
High-speed type
Does not change.