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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation (+, −, ×, ÷) – FNC 20 to FNC 29
10.3 FNC 22 – MUL / Multiplication
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
Cautions
1. Devices specified in
• In a 32-bit operation (by DMUL or DMULP), Z cannot be specified in .
2. When monitoring the operation result in a programming tool
Even if word devices are used, the operation result (64 bits) cannot be monitored at one time.
In such a case, floating point operation is recommended.
→ For the floating point operation, refer to Chapter 18.
Program examples
1. 16-bit operation
2. 32-bit operation
Function Changes According to Versions
The function of the FNC 22 instruction varies depending on the PLC version shown in the table below.
Compatible Versions
Item Function Summary
FX3S FX3G FX3GC FX3U FX3UC
Ver. 1.00
or later
Ver. 1.00
or later
Ver. 1.40
or later
Ver. 2.30
or later
Ver. 2.30
or later
Zero Flag
Turns M8304 ON when the operation result of MUL instruc-
tion is 0.
D
D
X000
D
FNC 22
MUL
D 0 D 2 D 4
S1
S2
(D 0)
×
(D 2)
→
(D 5,D 4)
8 9 72
X001
FNC 22
DMUL
D 0 D 2 D 4
S1
S2
D
(D 1,D 0)
×
(D 3,D 2)
→
(D 7,D 6,D 5,D 4)
1756 327 574,212