Mitsubishi Electronics FX3G User Manual

FX

3S

/FX

3G

/FX

3GC

/FX

3U

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3UC

 Series

Programming Manual - Basic & Applied Instruction Edition

18 Floating Point – FNC110 to FNC139

FN
C30
-FN
C3

9

R

ota

tion and 

Shi
ft

FN
C40-FN

C49

D

ata O
perati

on

FNC

50-FNC

59

High-Speed

 

Proc

essing

FM
C60-FN

C69

H

andy 

In

struction

FN
C70-FN

C79

E

xternal

 F

X

 I/O
 

De

vice

FNC

80-FNC

89

External

 FX 

Dev
ice

FNC1
00-
FNC10

9

Dat
a 

Transfer 2

FNC1

10-
FNC139

Fl

oati

ng Poi

nt

FNC14

0-F

N

C

149

Da

ta

 

Operation 2

FNC1

50-
FNC159

Pos
itioning 

Control

This instruction executes exponential operation whose base is "e (2.71828)".

→ For handling of floating point, refer to Subsection 5.1.3.

The exponent of [

+1, 

] is calculated, and the operation result is stored to [

+1, 

].

A real number can be directly specified as 

.

• In the exponential operation, the base (e) is set to "2.71828".

An operation error occurs in the following case; The error flag M8067 turns ON, and the error code is stored in D8067.
• When the operation result is outside the following range (error code: K6706)

2

−126

 

≤ | Operation result | < 2

128

Head device number storing binary floating point data used in exponential operation.

Real number (binary)

Head device number storing the operation result.

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

E

" "

P

P

FNC 124

EXP

D

−
−

Mnemonic

Operation Condition

16-bit Instruction

DEXP

DEXPP

Mnemonic

Operation Condition

32-bit Instruction

9 steps

Continuous

Operation
Pulse (Single)

Operation

  S

  D

  S

  D

   

S

   

S

   

D

   

D

   

S

Command

input

FNC124

DEXP

S 

D 

+1

Binary floating point

(real number)

+1

Binary floating point

(real number)

e

S 

S 

D 

D