289
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation (
+
,
−
,
×
,
÷
) – FNC 20 to FNC 29
10.3 FNC 22 – MUL / Multiplication
1
Int
roduct
ion
2
O
ver
view
3
In
str
uc
tion
Li
st
4
D
evices
in D
etail
5
Spec
ified t
he
D
evice &
C
onst
ant
6
Bef
ore
Pr
ogr
am
m
ing
7
B
asic
In
st
ru
ct
io
n
8
FN
C
00-FN
C
09
P
rogr
am
F
low
9
FN
C
10
-FN
C
19
Mo
ve
&
Co
mp
are
10
FNC2
0-F
NC2
9
Ar
ith.
&
Logic
O
per
ation
10.3
FNC 22 – MUL / Multiplication
Outline
This instruction executes multiplication by two values to obtain the result (A x B = C).
→
For the floating point multiplication instruction EMUL (FNC122), refer to Section 18.10.
1. Instruction format
2. Set data
3. Applicable devices
S
1
: This function is supported only in FX
3U
/FX
3UC
PLCs.
S
2
: Available only in 16-bit operations (Not available in 32-bit operations)
Explanation of function and operation
1. 16-bit operation (MUL and MULP)
The contents of
are multiplied by
in the binary format, and the multiplication result is transferred
to 32-bit [
+1,
] .
• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data are multiplied
algebraically.
5
×
(
−
8) =
−
40
• When a constant (K) is specified in
or
, it is automatically converted into the binary format.
Operand type
Description
Data type
Data for multiplication or word device number storing data
16- or 32-bit binary
Data for multiplication or word device number storing data
16- or 32-bit binary
Head word device number storing the multiplication result
32- or 64-bit binary
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
S
1
3
3
3 3
3
3
3
3
3 3 3 3
S
1
3
3
3 3
3
3
3
3 3 3 3
S
1
S
2
3
DMUL
DMULP
Mnemonic
Operation Condition
P
FNC 22
MUL
D
16-bit Instruction
7 steps MUL
MULP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
1
S
2
D
D
1
Command
input
FNC 22
MUL
BIN BIN BIN
( )
×
( )
→
( +1, )
16 bits 16 bits 32 bits
D
S1
S2
D
S1
S2
D
S
1
S
2