293
FX3G/FX3U/FX3UC Series Programmable Controllers
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 are divided
algebraically.
5500 ÷ (−540) = −10 (quotient) ... 100 (remainder)
• When a constant (K) is specified in [ +1, ] or [ +1, ], it is automatically converted into
the binary format.
Related devices
1. Relationship between flag operation and numeric value
*1. Available in all FX3G 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 opera-
tion) or2,147,483,647 (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
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