Mitsubishi MELSEC L Series User Manual page 343

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(d) Monitor buffer size specification area (Address: 201B
Set the size of the monitor data area.
Setting range: 0003
(e) Monitor data pointer storage area (Address: according to monitor buffer
head address setting (Default: 2600
1) The oldest data position of the monitor data area is stored using the
offset value from the head address of the monitor data area.
0 to (monitor buffer size specification (Default: 0D00
position
2) When the monitoring data exceeds the monitor buffer size, the new
data is written over the oldest data. (Ring buffer type)
The oldest data position of the monitor data area can be confirmed
from this area.
(Example) "2611
(f) Monitor data size area (Address: according to the monitor buffer head
address setting (Default: 2601
The number of monitor data stored in the monitor data area is stored.
0 to (monitor buffer size specification (Default: 0D00
monitor data
16 USING COMMUNICATION DATA MONITORING FUNCTION
to 1A00 (Default: 0D00
H H
/3300
H
" becomes the oldest data when "000F
H
monitor data pointer using "2602
the monitor data area.
/3301 ))
H H
/211B )
H H
)
H
))
H
) –3): oldest data
H
" is the
H
" as the head address of
H
Monitor data pointer
storage area
Monitor data size
storage area
Oldest data in the
monitor data area
) –2): Number of
H
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