3.
SPECIFICATIONS
MELSEC-A
*1:
*2:
When the
CPU
modules other than
A3H, A2A(S1),
and
A3A
are used,
devices
X
(input) are allocated with
2
inputs per device.
To include devices
X
in
designated devices, set as follows:
((number of designated
X
devices
x
2)
+
number of other designated
devices)
5
40
If
only devices
X
are designated, the number of inputs usable for one
communications time is half
the
value mentioned
in
the table.
Writing during a program run may be carried
out
if
all the following
conditions are met:
(This is different from the write during
PC RUN
with a
MELSEC-A
series
peripheral device (e.g.,
AGGPP).)
(a) The
PC CPU
is type
A3, A3N, A3H, A3M, A73
or
A3A.
(b) The program is not the currently running program.
(includes subprograms called by the currently running main pro-
gram)
(c) The
PC CPU
special relay is
in
the following states:
1)
M9050
signal flow exchange contact
............
OFF
(A3CPU
only)
.2)
M9051
(CHG
instruction disable)
...................
ON
POINT[
When the
AJ71C24
is used together
with
the
A2ACPU (Sl)
or
A3ACPU,
use the commands in Table
3.4
to perform the following functions:
e
Batch read/write, test, monitor data registration, and monitor of device
memory
0
Batch read/write of extension file registers by designating device num-
bers (continuous numbers)
e
Batch read/write of extension comments
When the commands in Table
3.3
are used, the available functions and
the range of devices which can be designated are limited to those avail-
able with the
A3HCPU.
Accordingly,
A2ACPU(S1)
and
A3ACPU
external devices are not acces-
sible.
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