Mitsubishi Electronics FX3G User Manual

FX

3S

/FX

3G

/FX

3GC

/FX

3U

/FX

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

- The exponent part is fixed to 2 digits.

When the exponent part is 1 digit, "30H (0)" is stored after the sign of the exponent part.

- "00H" or "0000H" is automatically stored at the end of the converted character string.

An operation error is caused in the following cases; The error flag M8067 turns ON, and the error code is stored in
D8067.

• When 

 is not located within the following range (error code: K6706)

0, 

±2

−126

 

≤

< ±2

128

• When the format specified by 

 is any value other than "0" or "1" (error code: K6706)

• When the total number of digits specified by 

+1 is not located within the following range (error code: K6706)

In the case of decimal point format:

When the number of digits of the decimal part is "0", Total number of digits 

≥ 2

When the number of digits of the decimal part is any value other than "0", Total number of digits 

≥ (Number of

digits of decimal part + 3)

In the case of exponent format:

When the number of digits of the decimal part is "0", Total number of digits 

≥ 6

When the number of digits of the decimal part is any value other than "0", Total number of digits 

≥ (Number of

digits of decimal part + 7)

• When the number of digits of the decimal part specified by 

+2 is not located within the following range (error 

code: K6706)
In the case of decimal point format: Number of digits of decimal part 

≤ (Total number of digits - 3)

In the case of exponent format: Number of digits of decimal part 

≤ (Total number of digits - 7)

• When the devices storing a character string specified by 

 exceeds the allowable device range (error code: 

K6706)

• When the conversion result exceeds the specified total number of digits (error code: K6706)

EVAL (FNC117)

Converts a character string (ASCII codes) into binary floating point data.

STR (FNC200)

Converts binary data into a character string (ASCII codes).

VAL (FNC201)

Converts a character string (ASCII codes) into binary data.

1

12

4

+1

+2

Total number of digits (12)

0

"30H (0)" is stored.

2 3 4 6 E +

1

1

Fixed to 2 digits.

+1

−12.34567

S

1

 

S

1

 

S

2

 

S

2

 

S

2

 

  

S

1

  

S

1

  

S

2

  

S

2

  

S

2

   

D