711
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
33 Extension File Register Control – FNC290 to FNC299
33.2 FNC291 – SAVER / Save to ER
31
FN
C
275-FN
C
279
Da
ta
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r 3
32
FN
C
280
-F
N
C
28
9
H
igh Speed
Pr
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33
FN
C
290-FN
C
299
Ext
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egi
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SF
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•S
T
L
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Funct
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Appl
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• Extension file registers are written in units of sector (2048 points).
The table below shows the head device number in each sector:
• If "n" is set to "0", it is handled as "2048" when the instruction is executed.
• When writing (transfer) of 2048 points is finished, execution of the instruction is completed and the
instruction execution complete flag M8029 turns ON.
• The number of already written points is stored in
.
2. Related device
→
For the instruction execution complete flag use method, refer to Subsection 6.5.2.
Cautions
1. Cautions on writing data to a memory cassette
Memory cassettes adopt flash memory. Note the following contents when writing data to extension file
registers in a memory cassette with the FNC291 instruction.
• It takes 50 to 60 ms to write 2048 points. If “n” is set to K0 or K2048, the operation cycle for executing this
instruction becomes longer by 50 to 60 ms.
If the operation cycle is severely affected, write data in two or more operation cycles.
When writing data in two or more operation cycles, set “n” in the range from K1 to K1024.
Sector
number
Head device
number
Written device range
Sector
number
Head device
number
Written device range
Sector 0
R0
ER0 to ER2047
Sector 8
R16384
ER16384 to ER18431
Sector 1
R2048
ER2048 to ER4095
Sector 9
R18432
ER18432 to ER20479
Sector 2
R4096
ER4096 to ER6143
Sector 10
R20480
ER20480 to ER22527
Sector 3
R6144
ER6144 to ER8191
Sector 11
R22528
ER22528 to ER24575
Sector 4
R8192
ER8192 to ER10239
Sector 12
R24576
ER24576 to ER26623
Sector 5
R10240
ER10240 to ER12287
Sector 13
R26624
ER26624 to ER28671
Sector 6
R12288
ER12288 to ER14335
Sector 14
R28672
ER28672 to ER30719
Sector 7
R14336
ER14336 to ER16383
Sector 15
R30720
ER30720 to ER32767
Device
number
Name
Description
M8029
Instruction execution
complete flag
When execution of the target instruction is completed, the instruction execution
complete flag M8029 turns ON.
In a program, however, there may be two or more instructions which can use the
flag M8029. To avoid confusion, make sure to use the NO contact of this flag
immediately under SAVER instruction so that this flag works only for SAVER
instruction.
E
E +1
E +2
E +2047
+1
+2
+2047
Write
(transfer)
Extension file registers (ER)
inside memory cassette
Extension registers (R)
inside built-in RAM memory
*1
*1 “n” points are written (transferred) in each operation cycle.
S
S
S
S
S
S
S
S
D