513
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
19 Data Operation 2 – FNC140 to FNC149
19.3 FNC142 – BTOW / BYTE to WORD
11
FN
C30-
FN
C39
R
o
ta
tion and
Sh
ift
12
FNC
4
0
-FNC49
D
a
ta
Op
e
ra
tio
n
13
FNC5
0
-FNC5
9
H
igh Speed
Pr
ocessi
ng
14
FM
C6
0
-F
NC6
9
H
and
y
In
st
ru
cti
o
n
15
FNC7
0
-FNC7
9
Ex
te
rn
a
l F
X
I
/O
D
evi
ce
16
FNC8
0
-FNC8
9
Ext
e
rnal
FX
D
evi
ce
17
F
N
C1
00
-F
NC
10
9
Da
ta
Tr
ansf
e
r 2
18
FN
C
110-FN
C
13
9
Fl
oat
ing P
o
in
t
19
FN
C
140-FN
C
149
Da
ta
O
per
at
io
n
2
20
FN
C
15
0-F
N
C
159
P
o
si
tioni
ng
C
ont
ro
l
19.3
FNC142 – BTOW / BYTE to WORD
Outline
This instruction combines the low-order 8 bits (low-order byte) of consecutive 16-bit data.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (BTOW and BTOWP)
1) The low-order byte (8 bits) of "n" 16-bit data starting from
is combined, and stored in "n/2" devices
starting from
as shown below.
2) The high-order byte (8 bits) of each combination source 16-bit data (
and later) is ignored.
Operand type
Description
Data type
Head device number storing data to be combined in unit of byte
16-bit binary
Head device number storing data acquired by combination in unit of byte
n
Number of byte data to be combined (0
≤
n)
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
3 3 3 3
3
3 3 3 3
3
n
3 3
3 3
P
FNC 142
BTOW
−
−
Mnemonic
Operation Condition
16-bit Instruction
7 steps
BTOW
BTOWP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
S
D
S
D
S
D
Command
input
FNC142
BTOWP
S
D
n
b15
b8 b7
b0
S
+0
+1
...
The high-order byte is ignored.
+2
+n-1
"n"
bytes
1st byte data
2nd byte data
3rd byte data
"n"th byte data
D
+0
+1
+n/2
*
...
2nd byte
4th byte
"n"th byte
1st byte
3rd byte
"n-1"th byte
...
...
b15
b8 b7
b0
* When "n" is an odd number,
refer to "3)" below
S