Mitsubishi FX3G Series Programming Manual

273
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation ( + , − , × , ÷ ) – FNC 20 to FNC 29
10.4 FNC 23 – DIV / Division
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
2. 32-bit operation (DDIV and DDIVP)
[ +1, ] indicates the dividend, [ +1, ] indicates the divisor, the quotient is transferred to
[ +1, ]), and the remainder is transferred to [ +3, +2].
• Four devices in total starting from are occupied to store the operation result (quotient and remainder). Make
sure that these four devices are not used for another control.
• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data is divided algebraically.
5500 ÷ (−540) = −10 (quotient) ... 100 (remainder)
• When a constant (K) is specified in [ +1, ] or [ +1, ], it is automatically converted into binary
format.
Related devices
1. Relationship between flag operation and numeric value
*1. Available in all FX3G/FX
3GC PLCs and FX3U/FX 3UC PLCs Ver. 2.30 or later.
Cautions
1. Operation result
• The most significant bit of the quotient and remainder indicates the sign (positive: 0, negative: 1) respectively.
• The quotient is negative when either the dividend or divisor is negative.
The remainder is negative when the dividend is negative.
2. Device specified as
• The remainder is not obtained when a bit device is specified with digit specification.
• In a 32-bit operation (by DDIV or DDIVP), Z cannot be specified as .
Error
• When the divisor is "0", an operation error is caused and the instruction is not executed.
• A operation error results when the operation result is over 32,767 (16-bit operation) or 2,147,483,647 (32-bit
operation). (Turns the carry flag ON.)
Device Name Description
M8304
*1
Zero
ON : When the operation result is 0.
OFF : When the operation result is a number other than 0.
M8306
*1
Carry
ON : Carry flag operates when the operation result is over 32,767 (16-bit operation) or
2,147,483,647 (32-bit operation).
OFF : When the operation result is less than 32,767 (16-bit operation) or 2,147,483,647
(32-bit operation).
S 1 S 1 S 2 S 2
D D D D
Quotient Remainder
BIN BIN
→ [ +1, ] ... [ +3, +2]
32 bits 32 bits
Dividend Divisor
BIN BIN
[ +1, ]
÷ [ +1, ]
32 bits 32 bits
Command
input
FNC 23
DDIV
D 
D  D  D  D 
S 1  S 2  S 1  S 2 
S 1  S 2 
D
S 1 S 1 S 2 S 2
D
D
S 2

Mitsubishi FX3G Series Specifications

General

Model	FX3G Series
Power Supply	AC 100-240V or DC 24V
Program Capacity	32, 000 steps
Execution Speed	0.21 µs/basic instruction
Communication Options	RS-422, USB, Ethernet
Expansion Modules	Analog, digital, communication
Programming Language	Ladder Logic, Instruction List
Built-in Functions	High-speed counters, pulse output
Analog I/O	Available via expansion modules