Mitsubishi Electric QJ81DL96 User Manual page 540

16
CompactFlash CARD
(4) When ejecting or replacing the CompactFlash card
(5) CompactFlash card capacity
(6) CompactFlash card diagnostic time
16
- 3 16.3 Precautions when Using CompactFlash Card
(a) Be sure to stop file access before ejecting or replacing the CompactFlash card.
 Section 16.5 Operations for Ejecting and Reinserting CompactFlash Card
(b) Not following the procedure shown in Section 16.5 may cause a loss of logging
data during processing, corruption of data on the CompactFlash card while
accessing, or a file system error.
(c) If an error occurs on the CompactFlash card, refer to the following section.
 Section 18.3.8 Troubleshooting related to data management, CompactFlash
cards
(d) High speed data logger module settings are saved on the CompactFlash card.
Therefore, the IP address of the high speed data logger module returns to the
initial status (192.168.3.3) when turning the power OFF/ON or resetting the
programmable controller CPU without a CompactFlash card inserted in the
module or without the settings written to the CompactFlash card.
As necessary, read the current settings before ejecting the CompactFlash card
and after replacing the card, promptly write those settings to the new card.
(a) Access speed to the CompactFlash card is affected by the amount of saved files.
In particular, access speed becomes extremely slow when saving files up to the
capacity limit of the CompactFlash card.
Use the CompactFlash card maintaining 10% or more free space on the card.
(b) A minimum size of the occupied file on the hard disk varies depending on the
CompactFlash card capacity. Therefore, the actual file size and the occupied file
size on the hard disk may differ.
(a) The high speed data logger module performs a diagnostics (file recovery, etc.) of
the inserted CompactFlash card contents at the times listed below.
 When powering ON from OFF, resetting the CPU module
 Inserting a CompactFlash card when powered ON
(b) The CompactFlash card diagnostic time takes longer when there are more files on
the card.
100 files takes approximately 5 seconds, 1000 files takes approximately 10
seconds.
(c) When many files are saved on the CompactFlash card, the following operations
require longer time. Delete unnecessary files.
 CompactFlash card status (X1) startup time
 Time before the high speed data logger module can start processing
(Module READY (X0) and module operating status (X5) startup time)