Mitsubishi FX3U Series Programming Manual page 110

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
3. Data register ← File register <writing by BMOV (FNC 15) instruction>
When a file register (D1000 or later) is specified for the destination of BMOV (FNC 15) instruction, it is
possible to directly write data to the file register area [A] inside the program memory.
Inside built-in RAM
memory or
memory cassette
Program
memory
Program/
comment
D1000
500 points ×
File register
14 blocks
[A]
maximum
(7000 points
maximum)
• By controlling BMOV instruction direction reverse flag M8024 for BMOV (FNC 15) instruction, data can be
transferred in the both directions in one program (as shown in the figure below).
X001
X000
M8001
Always OFF during
operation
Cautions on reading
Even if a file register (D1000 or later) is specified for the source of BMOV (FNC 15) instruction, the contents of
the file register area [A] inside the program memory are not read when the same number file register is not
specified for the destination (except the same number register update mode).
1) When a file register is specified for the source and a data register is specified for the destination
Inside built-in RAM
memory or
memory cassette
Program
memory
Program/
comment
D1000
500 points ×
File register
14 blocks
[A]
maximum
(7000 points
maximum)
108
Inside system
RAM
D 0
Data
memory
Data register
D1100
Data register
Write
[B]
D1499
Data register
D7999
→ For the same-number update mode, refer to the previous page.
M8024
S D
FNC 15
D1100 D200
BMOVP
M8024
Inside system
RAM
D 0
D200
Data
memory
Data register
D599
D1100
Data register
[B]
D1499
Data register
D7999
Write
OFF
D200
X001
D599
• When X001 is set to ON, data is transferred to
D1100
the data register area [B] and file register area [A]
as shown in the figure on the left.
If data cannot be written to the file register area
D1499
[A] because the protect switch of the memory
cassette (flash memory) is ON, data is written to
only the data register area [B].
When a file register device is specified for
in a general applied instruction, data is
transferred to only the data register area [B].
• A file register can be specified for
number of
same-number update mode is selected.
S
BMOV
direction
M8024(OFF):D1100
inverse
n
S
K400
M8024(ON) :D1100
BMOV
direction
inverse: OFF
Batch transfer of data registers
OFF
X000
• When X000 is set to ON, the data register area
[B] is read as shown in the figure on the left.
• A file register can be specified for
number of
same-number update mode is selected.
4 Devices in Detail
4.8 Data Register and File Register [D]
M8024
S D
FNC 15
D200 D1100
BMOVP
D is specified for
→ D
Batch transfer of data registers
D200
← D
Batch transfer of data registers
and writing to file register
D200
M8024
S D
FNC 15
D1100 D200
BMOVP
is specified for
S
→ For the same-number update mode,
refer to the previous page.
n
K400
D
. If the
S
S , the
n
K400
. If the
D
, the
D