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11 DATA LOGGING FUNCTION
11.12 SD Memory Card Replacement
11.12
SD Memory Card Replacement
SD memory cards can be replaced using the SD memory card forced disable function even while data logging is in progress.
MELSEC iQ-R CPU Module User's Manual (Startup)
Only the data saving to an SD memory card is stopped while this function is being executed. The data collection keeps
working. (Data collection continues in accordance with the settings registered when data logging is started.)
With the setting for the file transfer, an error occurs when the SD memory card is replaced during the file transfer. (
761 Codes of errors detected by other than the self-diagnostic function (4000H to 4FFFH))
If SD memory card replacement causes processing overflow, make adjustments by changing the collection
interval, internal buffer capacity, or other settings.
Behavior during SD memory card replacement
If the internal buffer becomes full during the time between SD memory card replacement and the resumption of data writes to
the SD memory card, processing overflow occurs resulting in missing data.
Storage file numbers after SD memory card replacement
The numbering of the first storage file created after SD memory card replacement differs depending on the storage file
switching condition, as described in the following table.
*1 While the data logging file transfer function is used, numbering begins at 00000001 only when the "Delete files completed transfer" is
disabled in the "File transfer" setting of CPU Module Logging Configuration Tool.
If the new SD memory card contains a "LOGGING" folder and its subfolders, folder deletion takes time,
possibly resulting in missing data. Ensure that the new SD memory card does not contain a "LOGGING"
folder.
Logging state during SD memory card replacement
SD memory cards can be replaced without depending on the current data logging state. SD memory card replacement results
in the deletion of the LOGGING folder if the data logging state is other than below:
• Stop
• Stop (after collection)
• Stop (after error)
Operations during SD memory card replacement
If one of the following operations is performed during the time between the removal and installation of SD memory cards, any
data collected during that time will not be stored in the new SD memory card.
• STOP to RUN state
*1
• Power-on to RUN state
*1
• Reset
*1
• Suspend data logging
• Stop data logging
*1 An error is generated if data logging was previously running based on the setting file contained in the replaced SD memory card.
Storage file switching condition
Storage file numbers after SD memory card replacement
Overwrite
Numbering continues from the number of the last storage file contained in the replaced SD memory card.
Stop
Numbering begins at 00000001.
Содержание MELSEC iQ-R-R00CPU
Страница 2: ......
Страница 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Страница 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Страница 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Страница 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Страница 524: ...522 30 MAINTENANCE AND INSPECTION FOR A REDUNDANT SYSTEM 30 1 Module Replacement in the Redundant System MEMO ...
Страница 1009: ...APPX Appendix 14 List of Available SQL Commands for CPU Module Database Access Function 1007 A MEMO ...
Страница 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
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