Mitsubishi Electric QJ81DL96 User Manual page 20

Precautions when using a redundant system
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(7) CompactFlash card format
(a) To format a CompactFlash card, use the high speed data logger module format function.
 Section 13.1.6 CompactFlash card diagnostics
(b) Do not format a CompactFlash card using the Windows
(c) Do not reset the control CPU or turn the power OFF when formatting a
CompactFlash card.
(d) High speed data logger module settings are saved to the CompactFlash card.
Therefore, all settings are lost when formatting a card. When necessary, read the
current settings before formatting and promptly write those settings after
formatting. The high speed logger module's IP address returns to the initial status
(192.168.3.3) when turning the power OFF/ON or resetting the programmable
controller CPU without writing the settings to the CompactFlash card.
(8) CompactFlash card life duration (a limit for writing data)
The CompactFlash card has a life duration (a limit for writing data).
For details, refer to the following section.
 Section 16.7 CompactFlash Card Life Duration
(9) About RECIPE folder
(a) A maximum number of recipe files that can be stored in the RECIPE folder is 256.
Storing large number of files in the RECIPE folder causes a longer processing
time for following operations. Delete unnecessary files.
 Displaying or operating the file browser
 Displaying a file list of recipe execution operation
 Recipe execution operation
(b) Do not store files other than recipe files in the RECIPE folder.
(1) Mountable base unit
When using the high speed data logger module in a redundant system, be sure to
mount the module to the extension base unit for CPU/redundant power supply.
The high speed data logger module cannot be mounted to the main base unit in a
redundant system.
(2) "Access target CPU setting"
(a) When the high speed data logger module is mounted to the Redundant CPU, it
can only access the own station CPU. It cannot access CPUs of other stations.
(b) When the high speed data logger module is mounted to a unit other than the
Redundant CPU, it cannot access the Redundant CPU of other stations.
(3) Dedicated instructions
When the high speed data logger module is mounted to the Redundant CPU, the
dedicated instructions cannot be used. If any of those instructions are used, an
"OPERATION ERROR" occurs in the Redundant CPU.
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format function.