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(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.
DINCP D0
32-bit instruction
Device used for indirect specification
DDECP D0
32-bit instruction
Device used for indirect specification
Data register
D+ K1000 D100 D102
MOV K1234 @D102
ADRSET D12000 D100
Setting an address
"D12000 h to D100 and D101
Setting the address that
is an addition of 1000 to
the address of D12000 to
D102 and D103
D0
D12000
D12287
File register
Extended data
register(D)
Extended link
register (W)
Internal user device
File register files
D12288
D63487
D13000
Since the areas of the data register and
extended data register are not sequence,
D13000 is inaccessible.