Mitsubishi MELSEC Q Series Reference Manual page 526

Item
Batch read
Batch write
Random read
Device
Test
memory
Random write Word units
Monitor data
registration
Monitor
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(2) Processing time of the programmable controller CPU when the
serial communication function is used (In the case of command
(format 4) for QnA compatible 4C frame)
Command Subcommand
Bit units
0401
Word units
Bit units
1401
Word units
Word units 0403
Bit units
1402
0801
Word units
0802
1 Indicates processing time required when accessing by designating
only the number of word access points.
2 Indicates processing time required when accessing by designating
only the number of double word access points.
POINT
(1) The programmable controller CPU performs only one of the above operations
during END processing.
If the programming tool and modules simultaneously access the
programmable controller CPU, the newly-requested processing has to wait
until the current processing ends. In this case, the number of scans required
for the processing increases even more.
(2) If the increase in scan time affects the operations of the programmable
controller CPU, access the CPU module multiple times by dividing the points.
Number of
access points
Number of
1)/2)
access points:
When 1)
0001 1/3584
0000 1/480
0001 1/3584
0000 1/480
0000 1/96
0001 1/94
1/80
0000
1
( )
1/96
0000
2
( )
1/96
0000
2
( )
Intervening time [ms]
Number of scans required for
(Increase in scan time)
Q00CPU, Q01CPU
Number of
Online change
access points:
When 2)
0.8 13.1
0.8 6.2
0.9 7.5
0.8 9.3
0.8 7.5
0.8 7.1
0.9 8.2
0.8 7.3
0.7 2.4
APPENDICES
processing
Online change
enabled disabled
3
3
3
3
3
3
3
3
3
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