Mitsubishi Electronics FX3G User Manual
275
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation (
+, −, ×, ÷) – FNC 20 to FNC 29
10.3 FNC 22 – MUL / Multiplication
1
Introdu
ction
2
Ov
ervi
ew
ew
3
Instruction
Li
st
4
D
evices
in Det
ai
l
5
Specifi
ed the
De
vice
&
C
onst
ant
ant
6
Bef
ore
ore
Pr
og
ra
mmi
ng
ng
7
Bas
ic
ic
Instruction
8
FN
C00-FN
C00-FN
C0
9
Program Fl
ow
9
FNC
10-FN
C19
Mov
e & Com
e & Com
pare
10
FNC
20-FNC
29
Arith. & Lo
gi
c
Operati
on
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
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
S
2
: This function is supported only in FX
3U
/FX
3UC
PLCs.
S
3
: 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 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 is multiplied
algebraically.
5
5
× (−8) = −40
• When a constant (K) is specified in
or
, it is automatically converted into 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
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
S1
S2
S1
S2
S1
S2
S3
DMUL
DMULP
DMULP
Mnemonic
Operation Condition
P
FNC 22
MUL
D
16-bit Instruction
7 steps MUL
MULP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
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