731
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
33 Extension File Register Control – FNC290 to FNC299
33.6 FNC295 – INITER / Initialize ER
31
FN
C
275-FN
C
279
Da
ta
Tr
ans
fe
r 3
32
FN
C
280
-F
N
C
28
9
H
igh Speed
Pr
oces
si
ng 2
33
FN
C
290-FN
C
299
Ext
ensi
on Fi
le
R
egi
st
er
34
SF
C
•S
T
L
Pr
o
g
ra
m
m
in
g
35
In
te
rru
p
t
Funct
ion
36
Sp
e
cia
l De
vic
e
37
E
rro
r C
o
d
e
A
V
e
rs
ion U
p
In
fo
rm
a
tio
n
B
Ex
ec
ut
ion Ti
m
e
s
C
Appl
ic
ab
le
In
st
ru
ct
ion Li
st
Operation
• Extension file registers (ER) [inside the memory cassette]
Caution
About 25 ms is required to initialize one sector.
When initializing two or more sectors, take either measures shown below in a program.
• Set a large value to the watchdog timer D8000 using the following program
Guideline of the watchdog timer set value
A value acquired by the following procedure can be regarded as the guideline of the watchdog timer set
value.
If an acquired value is 200 ms or less, however, it is not necessary to change the watchdog timer set value.
1) Write a program to be executed from GX Developer to the PLC.
[Online]
→
[Write to PLC...]
2) Set the current value of D8000 to "1000" using the device test function in GX Developer.
[Online]
→
[Debug]
→
[Device test...]
→
"Word device/buffer memory" in Device test dialogbox
3) Set the PLC mode to RUN, and execute the program. (Execute this instruction also.)
4) Monitor the maximum scan time D8013 using the device batch monitoring function in GX Developer.
5) The value of D8013 is stored in every 0.1 m seconds.
Watchdog timer time should be one-tenth of the value added 50 to 100 to D8013.
• Setting WDT (FNC 07) instruction just before and after INITER instruction as shown below:
Device number
Current value
Before execution
After execution
H1234
HFFFF
+1
H5678
HFFFF
+2
H90AB
HFFFF
..
.
...
...
+(2048
×
n)-1
HCDEF
HFFFF
S
S
S
S
M8002
FNC 12
MOV
K
{{{
D8000
Initial pulse
The watchdog timer is reset.
FNC295
INITER
n
FNC 07
WDT
FNC 07
WDT
The watchdog timer is reset.
Command
input
S
