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FX Series Programmable Controlers

Applied Instructions 5

5-122

5.11.6

EAUB (FNC 121)

Operation:

The floating point value of S

is subtracted from the

floating point value of S

and the result stored in

destination device D.

Points to note:

All points of the EADD instruction apply, except that a subtraction is performed.
See page 5-122.

5.11.7

EMUL (FNC 122)

Operation:

The floating point value of S

is multiplied with the

floating point value of S

. The result of the

multiplication is stored at D as a floating point
value.

Points to note:

Point a, b, c and d of the EADD instruction apply, except that a multiplication is performed.
See page 5-122.

Mnemonic

Function

Operands

Program steps

ESUB
FNC 121
(Floating
Point
Sub-traction)

Subtracts one
floating point
number from
another

K, H - integer value automati-
cally
converted to floating point
D - must be in floating point
number format (32 bits).

D - a floating
point value
(32 bits).

DESUB,
DESUBP:
13 steps

Mnemonic

Function

Operands

Program steps

EMUL
FNC 122
(Floating
Point Mul-
tiplication)

Multiplies two
floating point
numbers together

K, H - integer value automati-
cally
converted to floating point

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

D - a floating
point value
(32 bits).

DEMUL,
DEMULP:
13 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

FLAGS

Zero M8020

Borrow M8021

Carry M8022

DESUB

X17

D120

K79124

D128

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

DEMUL

M12

D108 K1000 D130