Mitsubishi Electronics FX3G User Manual

290

/FX

3GC

/FX

3UC

Series

Programming Manual - Basic & Applied Instruction Edition

10 Arithmetic and Logical Operation (

+, −, ×, ÷) – FNC 20 to FNC 29

10.10 FNC 29 – NEG / Negation

10.10 FNC 29 – NEG / Negation

Outline

This instruction obtains the complement of a numeric value (by inverting each bit and adding "1").
This instruction can be used to negate the sign of a numeric value.

→ For the Floating point negation ENEG (FNC128), refer to Section 18.16.

1. Instruction format

2. Set data

3. Applicable devices

Explanation of function and operation

1. 16-bit operation (NEG and NEGP)

Each bit of

is inverted (0

→ 1, 1 → 0), "1" is added, and then the result is stored in the original device.

2. 32-bit operation (DNEG and DNEGP)

Each bit of [

+1,

] is inverted (0

→ 1, 1 → 0), "1" is added, and then the result is stored in the original

device.

Caution

Note that the complement is obtained in every operation cycle in a continuous operation type instruction.

Operand type

Description

Data type

Word device number which stores data for obtaining complement and will store the
operation result (The operation result will be stored in the same word device number.)

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

X Y M T C S D .b KnX KnY KnM KnS T C D R U \G

V Z Modify K H

" "

DNEG
DNEGP

Mnemonic

Operation Condition

FNC 29

NEG

16-bit Instruction

3 steps NEG

NEGP

Mnemonic

Operation Condition

Continuous

Operation
Pulse (Single)

Operation

32-bit Instruction

5 steps

Continuous

Operation
Pulse (Single)

Operation

Command

input

FNC 29

NEGP

( )+1

→

Command

input

FNC 29

DNEGP

( + 1, ) +1 = ( + 1, )