39
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.7 Types and Setting of Parameters
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
2.7.3
Memory capacity setting range
~
Built-in memory capacity
3
Can be set by changing parameter.
Cautions on setting the memory capacity
When one block is set in each capacity setting, the memory capacity is reduced by 500 steps.
Each setting should satisfy the following expression:
1) With regard to the comment capacity, up to 50 device comments can be set in one block.
2) With regard to the file register capacity, up to 500 (16-bit) file registers can be set in one block.
3) In the special unit initial value setting
*1
, 8 blocks (4000 steps) are used.
4) In the positioning setting
*1
, 18 blocks (9000 steps) are used.
*1.
GX Developer Ver.8.23Z or later is applicable.
Caution
After changing the memory capacity setting, make sure to write both the programs and parameters to the
PLC.
If only the parameters are written to the PLC, program errors (such as parameter error, circuit error and
grammar error) may occur in the PLC.
2.7.4
Compatible optional memory model
Memory capacity
setting
Comment capacity
setting
Unit: Block
File register capacity
setting
Unit: Block
Special unit initial
value setting
*1
Unit: Block
Positioning setting
*1
Unit: Block
2000 steps
3
0 to 3
0 to 3
–
–
4000 steps
3
0 to 7
0 to 7
–
–
8000 steps
3
0 to 15
0 to 14
8
–
16000 steps
3
0 to 31
0 to 14
8
18
32000 steps
3
0 to 63
0 to 14
8
18
64000 steps
~
0 to 127
0 to 14
8
18
Model name
Maximum number
of steps
Memory type
Allowable number of
times of writing
Remarks
FX
3U
-FLROM-64
64000
Flash memory
10000 times
Write-protect switch is provided.
FX
3U
-FLROM-16
16000
Flash memory
10000 times
Write-protect switch is provided.
FX
3U
-FLROM-64L
64000
Flash memory
10000 times
Write-protect switch and loader
function are provided.
Memory capacity
setting range
Comment
capacity setting
≥
File register
capacity setting
Special unit initial
value setting
*1
Positioning
setting
*1
+
+
+
