101
2
3
4
5
6
7
8
3.4
Indir
ect Spe
cification
(3) Precautions
(a) The address for indirect specification uses two words. Therefore, to substitute indirect specification for index
modification, the addition/subtraction of 32-bit data is required. The following is the ladder used for the address
addition/subtraction of the device stored in D1 and D0 for indirect specification.
[To add "1" to the address of the device for indirect specification]
[To subtract "1" from the address of the device for indirect specification]
(b) Indirect specification of extended data register (D) and extended link register (W)
Indirect specification with indirect address can be performed in the extended data register (D) and extended link
register (W).
Note that when indirect specification is performed to the extended data register (D) and data register (D) in internal
device or to the extended link register (W) and link register (W) in internal device, the areas of the internal user
device and extended data register (D) or extended link register (W) are not treated as a sequence.
D
IN
CP
D0
32
-bit instructi
o
n
D
e
v
ice use
d
f
o
r in
d
irect specificati
o
n
DD
E
CP
D0
32
-bit instructi
o
n
D
e
v
ice use
d
f
o
r in
d
irect specificati
o
n
D
ata
re
gi
ster
D+ K1000 D100 D102
MO
V
K1234
@
D102
ADRSET D12000 D100
S
ett
i
n
g
an
a
dd
ress
"D12000
h
t
o D100
an
d D101
S
ett
i
n
g
the
a
dd
ress
that
i
s
an
a
ddi
t
io
n
o
f
1000
t
o
the
a
dd
ress
o
f
D12000
t
o
D102
an
d D103
D0
D12000
D122
87
Fil
e
re
gi
ster
E
xten
d
e
d d
ata
re
gi
ster
(D)
E
xten
d
e
d li
nk
re
gi
ster
(W)
I
nterna
l
user
d
e
vi
ce
Fil
e
re
gi
ster
f
il
es
D122
88
D
6
34
87
D13000
Si
nce
the
areas
o
f
the
d
ata
re
gi
ster
an
d
exten
d
e
d d
ata
re
gi
ster
are
n
o
t
se
q
uence
,
D13000 i
s
i
naccess
i
b
l
e
.