33
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.6 Program Memory and Devices (Battery Backed)
1
In
troduct
io
n
2
Ov
e
rv
ie
w
3
In
st
ru
ct
ion
Li
st
4
D
evi
ce
s
in
De
ta
il
5
Speci
fied t
h
e
D
evi
ce &
C
onst
a
nt
6
Bef
o
re
Pr
ogr
a
m
m
ing
7
Bas
ic
In
st
ru
cti
o
n
8
FNC0
0
-FNC0
9
P
ro
g
ra
m F
lo
w
9
FNC1
0
-FNC1
9
M
ov
e
&
C
om
par
e
10
FNC
20-
FNC
2
9
Ar
ith.
&
Logi
c
O
per
at
io
n
2.6
Program Memory and Devices (Battery Backed)
2.6.1
Memory structure
FX
3U
/FX
3UC
PLCs are supplied with RAM memory.
By mounting an optional memory device, the memory type can be changed.
1. When using the built-in memory (without attached optional memory)
2. When using an attached optional memory (without using the built-in memory)
CPU
System ROM
Built-in program memory
(RAM)
Parameter
File register (D)
Comment
Sequence program
Optional memory
(flash memory)
Not attached
Built-in device memory (RAM)
[Bit device memory]
•
Data register (D)
•
Timer present value register (T)
•
Counter present value register (C)
•
Index register (V, Z)
Contact image memory
•
Input relay (X)
•
Output relay (Y)
•
Auxiliary relay (M)
•
State relay (S)
Timer contact and time counting coil
Counter contact, counting coil, and reset coil
•
Extension register (R)
[Data memory]
CPU
System ROM
Built-in program memory
(RAM)
Not used
Optional memory
(flash memory)
Parameter
File register (D)
Comment
Sequence program
Extension file register (ER)
Attachment of an optional memory is automatically
recognized (when the power is ON), and the built-in
program memory is disconnected.
(The priority is given to the optional memory.)
Built-in device memory (RAM)
[Bit device memory]
[Data memory]
Tr
ans
fe
r and i
n
iti
a
liz
a
ti
on by
in
stru
cti
o
n
s
Contact image memory
•
Input relay (X)
•
Output relay (Y)
•
Auxiliary relay (M)
•
State relay (S)
Timer contact and time counting coil
Counter contact, counting coil, and reset coil
•
Data register (D)
•
Timer present value register (T)
•
Counter present value register (C)
•
Index register (V, Z)
•
Extension register (R)
Содержание FX3U Series
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