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APPENDICES
MELSEC-A
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I
r-
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L..
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APPENDIX
5.
Communications Time between a PC CPU and an
AJ7lC24
When the
PC
CPU is in the run state, data is processed after executing the
END
instruction in response to a request from the
AJPi
C24.
Section
3.3.1
gives the minimum number of devices processed per communications.
The intervening times (i.e. by how much the scan time increases) for each
processing operation and its corresponding processing times (indicated in
number of scans) are shown below.
(1)
ACPU common command
Sean
Count
Ao-
qulrod
kr
Proeouing
A3N
AOJZH,
AlN,
A3N
Sean
Count
Ao-
qulrod
kr
A3H
Proeouing
UnR
Device
memory
Device
data
I
Batch
1
1
Bit
units
BR
1
road
davices
Batch
write
devices
Test
1;;;its
1
1
(ran-
dom
write)
devices
I
I I
1.13
ms
I
0.81
ms
I
2.42
mr
1
I
device
'R
only)
I
I I
4
'enable
durina
1.13
ms
I
0.90ms
I
1.06ms
1
I
2
scans
davicar
(1
rc8n when
I
I
I
I
'enable durinm
1
scan
I
Batch read
devices
2.42
ms
0.76
ms
'
1.27
ma
ER
64
2
scan
Batch write
(3
rcanr
for
ET
64
[only AnACPU])
devices
2.60
ms
0.76
ms
1.27
ms
EW
file
Extension
Test
register (Random write)
ET
devices
0.97
ms
0.87
ms
1.31
ms
10
Monitor data
registration
1
rcan
1.42
ms
0.98
mr
1.75
mr
ME
Monitor
EM
-
-
-
-
-
Bunor
cw
Batch write
memory
CR
Batch
read
-
- -
- -
APP-8
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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