Mitsubishi Electronics FX3U Garage Door Opener User Manual


 
279
FX3S/FX3G/FX3GC/FX3U/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
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
Zero
ON : When the operation result is 0.
OFF : When the operation result is a number other than 0.
M8306
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