When an instruction other than those above is used, the accumulator can be used
in the sequence program just like a data register.
MOV
I
Index registers
2,
V
I
K4XO
D5Z
The index registers
(2,
V)
are used for the index qualification
of
devices such as
X,
Y,
M,
L,
S,
B,
F,
T,
C, D,
W,
R, K,
H,
P.
Note that when used with any bit device,
the index register may only be used
to
specify the digit.
The index registers can be used in the sequence program like the data registers.
They are
1
point and consist of 16 bits. Both read and write operations can be
performed per 16 bits. For
32
bit operations the
Z
register is the lower 16 bits and
the
V
register is the upper 16 bits, therefore
V
cannot be specified by a
32
bit
instruction. Contents
of
the index registers is cleared in the same way as with the
data registers.
I
Ladderexample
I
The data
XO
to
Xi
F
is
stored
into
D5+2.
64
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