Mitsubishi FX3U Series Programming Manual

265
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation ( + , − , × , ÷ ) – FNC 20 to FNC 29
10.1 FNC 20 – ADD / Addition
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
10.1 FNC 20 – ADD / Addition
Outline
This instruction executes addition by two values to obtain the result (A + B = C).
→ For the floating point addition instruction EADD (FNC120), refer to Section 18.8.
1. Instruction format
2. Set data
3. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (ADD and ADDP)
The contents of are added to in binary format, and the addition result is transferred to .
• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data is added algebraically.
5 + (−8) = −3
• When a constant (K) is specified in or , it is automatically converted into binary format.
2. 32-bit operation (DADD and DADDP)
The contents of [ +1, ] are added to [ +1, ] in binary format, and the addition result is
transferred to [ +1, ].
• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data is added algebraically.
5500 + (−8540) = −3040
• When a constant (K) is specified in [ +1, ] or [ +1, ], it is automatically converted into binary
format.
Operand type Description Data type
Data for addition or word device number storing data 16- or 32-bit binary
Data for addition or word device number storing data 16- or 32-bit binary
Word device number storing the addition result 16- or 32-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
XYMTCSD.b KnX KnY KnM KnS T C D R U\G VZModifyKH E ""P
33333333 S 33 3 33
33333333 S 33 3 33
3333333 S 33 3
DADD
DADDP
Mnemonic Operation Condition
P
FNC 20
ADD
D
16-bit Instruction
7 steps
ADD
ADDP
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 2 S 1 D
FNC 20
ADD
S 1  S 2 
+ →
Command
input
D  S 1  S 2  D 
S 1 S 2
S 2 S 2 S 1 S 1
D 1 D 1
FNC 20
DADD
S 1  S 2 
[ +1, ] + [ +1, ] → [ + 1, ]
Command
input
D  S 1  S 2  D  S 1  S 2  D 
S 1 S 1 S 2 S 2

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)