Mitsubishi Electronics FX3G Manual Do Utilizador

278

/FX

3GC

/FX

3UC

Series

Programming Manual - Basic & Applied Instruction Edition

10 Arithmetic and Logical Operation (

+, −, ×, ÷) – FNC 20 to FNC 29

10.4 FNC 23 – DIV / Division

10.4

FNC 23 – DIV / Division

Outline

This instruction executes division by two values to obtain the result (A

÷ B = C ... ).

→ For the floating point division instruction EDIV (FNC123), refer to Section 18.11.

1. Instruction format

2. Set data

3. Applicable devices

S1:This function is supported only in FX

/FX

3GC

/FX

3UC

PLCs.

S2:This function is supported only in FX

/FX

3UC

PLCs.

S3: Available only in 16-bit operations (Not available in 32-bit operations)

Explanation of function and operation

1. 16-bit operation (DIV and DIVP)

indicates the dividend,

indicates the divisor, the quotient is transferred to

, and the remainder is

transferred to

+1.

• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data is divided algebraically.

÷ (−5) = −7 (quotient) ... 1 (remainder)

• Two devices in total starting from

are occupied to store the operation result (quotient and remainder). Make

sure that these two devices are not used for another control.

• When a constant (K) is specified as

, it is automatically converted into binary format.

Operand type

Description

Data type

Data for division or word device number storing data (dividend)

16- or 32-bit binary

Data for division or word device number storing data (divisor)

16- or 32-bit binary

Head word device number storing the division result (quotient and remainder)

32- or 64-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

X Y M T C S D .b KnX KnY KnM KnS T C D

U \G

Modify K H

" "

DDIV
DDIVP

Mnemonic

Operation Condition

FNC 23

DIV

16-bit Instruction

7 steps DIV

DIVP

Mnemonic

Operation Condition

Continuous

Operation
Pulse (Single)

Operation

32-bit Instruction

13 steps

Continuous

Operation
Pulse (Single)

Operation

Dividend   Divisor Quotient Remainder
BIN     BIN      BIN     BIN
(     )

÷ ( ) → ( ) ... ( +1)

16 bits 16 bits 16 bits 16 bits

Command

input

FNC 23

DIV