745
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
31 Data Transfer 3 – FNC275 to FNC279
31.2 FNC279 – WBFM / Divided BFM Write
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
31.2
FNC279 – WBFM / Divided BFM Write
Outline
This instruction writes data to continuous buffer memories (BFM) in a special function block/unit over several
operation cycles by the time division method. This instruction is convenient for writing send data, etc. to
buffer memories in a special function block/unit for communication by the time division method.
TO (FNC 79) instruction is also available for writing data to the buffer memory (BFM).
→
For TO (FNC 79) instruction, refer to Section 15.10.
1. Instruction format
2. Set data
3. Applicable devices
S
: Except special data register (D)
Operand Type
Description
Data Type
m1
Unit number [0 to 7]
16-bit binary data
m2
Head buffer memory (BFM) number [0 to 32766]
Head device number storing data to be written to buffer memory (BFM)
n1
Number of all buffer memories (BFM) to be written [1 to 32767]
n2
Number of points transferred in one operation cycle [1 to 32767]
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V Z Modify K H
E
"
"
P
m1
3 3
3 3
m2
3 3
3 3
S
3
3
n1
3 3
3 3
n2
3 3
3 3
FNC 279
WBFM
16-bit Instruction
11 steps WBFM
Mnemonic
Operation Condition
Continuous
Operation
−
Mnemonic
Operation Condition
32-bit Instruction
S
S
