Mitsubishi Electric AJ71C24-S6 User Manual page 292

I
APPENDICES
MELSEC-A
APPENDIX 5. Communications Time between a PC CPU and an AJ71C24
When the PC CPU is in the run state, data is processed after executing the
END instruction in response to a request from the AJ71C24. 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
Device
memory
ixtension
ile
egister
3uffer
nemory
I
I
Intervening Times (Scan Time increases)-
- !
Scan Processing quired Count for Re-
A3N
Batch
read
Batch
write
Random write
Bit units
Word
devices
Test
(ran-
dom
write)
Monitor
I
ME
I
1.75 ms
1
0.98 ms
1
1.42 ms
I
de:Les
I
1 scan
Bit units
Word
devices
APP
-
8
BR
WR
Bit units
devices
BW
WW
0.76 ms
1.13 ms
BT
WT
1.13 ms
1.13 ms
0.57 ms
0.81 ms
1.13 ms
1.13 ms
0.94 ms
0.84 ms
1.38 ms
2.42 ms
0.90 ms
0.90 ms
1.06 ms
2.60 ms
256
devices
64
devices
1.06 ms
1.06 ms
scan
(2 scans for
device 'R' only)
160
devices
64
devices
2 scans
scan when
'enable during
RUN' is set [ex-
cluding R])
20
devices
10
devices
2 scans
(1 scan when
'enable during
RUN' is set [ex-
eluding RI)