Mitsubishi Electronics Mitsubishi Digital Electronics Video Gaming Accessories FX3G ユーザーズマニュアル
451
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15.10 FNC 79 – TO / Write To A Special Function Block
11
FN
C
C
30
-FN
C
C
39
R
otati
on and
on and
Shi
ft
ft
12
FNC4
0-F
0-F
NC4
9
D
ata O
per
ati
per
ati
on
13
FN
C
C
50-FN
C
59
H
igh S
pe
ed
P
rocessing
14
FM
C
C
60-FN
C
69
H
andy
In
st
ru
ct
ion
15
FNC7
0-F
0-F
NC7
9
Ex
ter
nal FX
I/O
D
evice
16
FN
C
C
80-FN
C
89
Ext
ernal
FX
ernal
FX
De
vic
vic
e
17
FN
C
100-
FN
FN
C
10
9
Da
ta
Transf
er 2
er 2
18
FN
C
110-
FN
FN
C
139
Floati
ng Poi
nt
19
FN
C
14
0-F
N
C
149
Da
ta
O
per
at
at
ion 2
20
FN
C
150-
FN
FN
C
159
Posit
ioning
C
ont
ro
ro
l
15.10 FNC 79 – TO / Write To A Special Function Block
Outline
This instruction writes data from a PLC to buffer memories (BFM) in a special extension unit/block.
When a large capacity of data is written to buffer memories (BFM) by this instruction, a watchdog timer error may
occur. When splitting the data to be written does not affect the control, use WBFM (FNC279) instruction.
When a large capacity of data is written to buffer memories (BFM) by this instruction, a watchdog timer error may
occur. When splitting the data to be written does not affect the control, use WBFM (FNC279) instruction.
→ For WBFM (FNC279) instruction, refer to Section 31.2.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (TO and TOP)
→ For the common items between FROM instruction and TO instruction, refer to Subsection 15.9.1.
PLC (word device)
→ Special extension unit/block (BFM)
"n"-point 16-bit data starting from
inside a PLC are transferred (written) to "n"-point buffer memories starting
from the buffer memory (BFM) # m2 inside a special extension unit/block No. m1.
Operand Type
Description
Data Type
m1
Unit number of a special extension unit/block
(K0 to K7 from the right side of the main unit)
(K0 to K7 from the right side of the main unit)
16- or 32-bit binary
m2
Transfer destination buffer memory (BFM) number
16- or 32-bit binary
Device number storing the transfer source data
16- or 32-bit binary
n
Number of transfer points
16- or 32-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
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
3
3
3
3 3 3 3
3 3
3
n
3 3
3 3
P
FNC 79
TO
D
DTO
DTOP
Mnemonic
Operation Condition
32-bit Instruction
17 steps
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
16-bit Instruction
9 steps
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
TO
TOP
S
S
S
Command
input
FNC 79
TO
m1
m2
n
S
Unit No.
m1 = 0 to 7
Transfer destination (Special
extension unit/block) BFM #
m2 = 0 to 32766
Transfer source (PLC)
Number of transfer points
n = 1 to 32767