APPENDICES
.
~
-,,
,
,
I
,\
.
"
,
a
MELSEC-A
(2)
AnACPU dedicated command
3evice
Jata
T
)wice
nernory
c
n
-
Extension
file
register
Extonrion
'rogram comment
Item
Sun Count Requird
for
Proceuing
Bit unit8
JR
1.19
II).
256 devices
Word units
QR
2.07
ms
o4
devices
Batch read
1
'
(2 rcanr
for
device
'FT
only)
Bit units
Jw
0.99
ms
160 devices
Word units
QW
2.32
ms
64
devices
scans
Batch write
(1 scan when 'enable
ing
R])
during
RUN'
ir
ret [exclud-
Test
(random write)
Bit units
JT
0.91
mr
20 devices
Word units
QT
0.93
ms
10 devices
2
scans
(1 scan when 'enable
during
RUN'
is
set
[exclud-
ing
RI)
Bit units
Monitor
1 scan
for
device
'R'
only
1
scan
Direct read
Direct write
Batch roa'd 2.31
mc
Batch write
128
bytes
13 scans
(4
scans when a
ret
range
covers several block*)
2 scans
I
IPOlNTS
I
I
(1) The PC CPU can only process one of these operations with each
END
processing.
If
the AGGPP and AJ71 C24 access a given PC CPU at the
same time, one processing must wait
until
the other processing is
completed. Therefore, the scan count required for processing further
increases.
(2) Even though communications using AJ71C24 is not performed, scan
time increases
0.2
msec (0.1 msec with A3HCPU, A2ACPU(S1), and
A3ACPU).
1
I
APP
-
10
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