Справочник Пользователя для Mitsubishi Electronics FX

FX Series Programmable Controlers

Applied Instructions 5

5-120

5.11.3

EBCD (FNC 118)

Operation:

Converts a floating point value at S into separate

mantissa and exponent parts at D and D

(scientific format).

Points to note:

a) The instruction must be double word format. The destinations D and D

represent the

mantissa and exponent of the floating point number respectively.

b) To provide maximum accuracy in the conversion the mantissa D will be in the range 1000 to

9999 (or 0) and the exponent D

corrected to an appropriate value.

c) E.g. S= 3.4567

-5

will become D= 3456, D

= -8

5.11.4

EBIN (FNC 119)

Operation:

Generates a floating point number at D from
scientific format data at source S.

Points to note:

a) The instruction must be double word format. The source data Sand S

represent the

mantissa and exponent of the floating point number to be generated.

b) To provide maximum accuracy in the conversion the mantissa S must be in the range 1000

to 9999 (or 0) and the exponent S

corrected to an appropriate value.

c) E.g. S= 5432, S

= 12 will become D= 5.432 x 10

Mnemonic

Function

Operands

Program steps

EBCD
FNC 118
(Float to
Scientific
conversion)

Converts floating
point number
format to scientific
number format

D - must be in floating
point format (32 bits).

D - 2 consecutive
devices are used

D - mantissa
D

- exponent.

DEBCD,
DEBCDP:
9 steps

Mnemonic

Function

Operands

Program steps

EBIN
FNC 119
(Scientific
to Float
conversion)

Converts scientific
number format to
floating point
number format

D - 2 consecutive
devices are used

S- mantissa
S

- exponent.

D - a floating point
value
(32 bits).

DEBIN,
DEBINP:
9 steps

0(S)

FX FX

(2C)

2N(C)

(2C)

2N(C)

0(s)

PULSE-P

(2C)

2N(C)

0(s)

16 BIT OPERATION

0(s)

(2C)

2N(C)

32 BIT OPERATION

DEBCD

X14

D102 D200

0(S)

FX FX

(2C)

2N(C)

(2C)

2N(C)

0(s)

PULSE-P

(2C)

2N(C)

0(s)

16 BIT OPERATION

0(s)

(2C)

2N(C)

32 BIT OPERATION

DEBIN

X15

D202 D110