![Mitsubishi Electric MELSEC FX3G Скачать руководство пользователя страница 787](http://html.mh-extra.com/html/mitsubishi-electric/melsec-fx3g/melsec-fx3g_programming-manual_239083787.webp)
785
FX
3G
/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
Transf
er 3
32
FN
C
280-
FN
C
289
H
igh Speed
Pr
ocessing 2
33
FN
C
29
0-F
N
C
299
Ext
ens
ion Fi
le
R
egi
ster
34
FN
C
300-
FN
C
305
FX
3U
-C
F-A
D
P
35
SFC•S
TL
Pr
ogr
am
m
ing
36
In
ter
rupt
Functi
on
37
Special D
evice
38
E
rro
r C
ode
A
Ve
rs
ion U
p
In
fo
rm
atio
n
B
Execution T
im
es
2. Allowable number of writes to the memory
Note the following cautions on access to extension file registers.
• Data can be written to the memory cassette (flash memory) up to 10,000 times.
Every time the INITR (FNC292), RWER (FNC294) or INITER (FNC295) instruction is executed, it is
counted as a write to the memory. Make sure not to exceed the allowable number of writes.
When a continuous operation type instruction is used, data is written to the memory in every operation
cycle of the PLC. For preventing this, make sure to use a pulse operation type instruction.
• Execution of the LOADR (FNC290), SAVER (FNC291) or LOGR (FNC293) instruction is not counted as a
write to the memory. However, it is necessary to initialize the writing target sector before executing the
SAVER (FNC291) or LOGR (FNC293) instruction.
Every time the INITR (FNC292)or INITER (FNC295) instruction is executed, it is counted as a write to the
memory. Make sure not to exceed the allowable number of writes.
Errors
An operation error is caused in the following cases; The error flag M8067 turns ON, and the error code is
stored in D8067.
• When any device number other than the head device number of a sector of extension file registers (ER) is
set to
(error code: K6706)
• When a device number to be initialized exceeds “32767” (error code: K6706)
In this case, devices up to R32767 (ER32767) are initialized.
• When the protect switch of the memory cassette is set to ON (error code: K6770)
• When a memory cassette is not connected (error code: K6771)
Program example
In the program example shown below, the extension file registers ER0 to ER2047 in sector 0 are initialized.
• Extension file registers (ER) [inside the memory cassette]
Device number
Current value
Before execution
After execution
ER0
H1234
HFFFF
ER1
H5678
HFFFF
ER2
H90AB
HFFFF
...
..
.
..
.
ER2047
HCDEF
HFFFF
S
X000
END
R0
K1
FNC 07
WDT
FNC295
INITER
FNC 07
WDT