Chapter 11 Datalog Function
11.9 SD Memory Card
11.9.1 SD Memory Specifications
To use datalog function, the SD memory used should satisfy the following specifications.
Up to 32 GB (supports SPI MODE, SD, SDHC)
(Only 8GB can be available in more than 8GB memory)
Working Temperature Range
-25℃ ~ 85℃
Should satisfy IEC61000-4-2
Up to 100mA (when reading, writing)
Up to 100,000 times (for SLC)
Note
1. Datalog function of motion controller is capable of using all SD memories that satisfy the specifications
above.
2. Optimal performance can be expected by using the recommended products (SanDisk, Transcend).
Please use the recommended products unless required otherwise
11.9.2 Caution
Please pay attention to the following when using datalog function with SD memory card.
(1) Power Off during SD Memory Writing
(a) Power off or motion controller reset during writing of data collected by motion controller into the SD memory may
damage the file system of the memory card. Although motion controller verifies the file system of the SD memory
when applying electric power to convert the damaged files into usable files, such restoration may not be possible
depending on the level of damage. When powering off motion controller, please perform power off after verifying
that the SD memory writing is not being performed.
(b) Power off or motion controller reset during writing of data collected by motion controller into the SD memory
causes all data saved in the buffer memory inside the buffer memory. Therefore, the data collected immediately
before power off may not have been saved properly. When powering off motion controller, please perform power
off after verifying that the SD memory writing is not being performed.
(2) Time Required when Suspending SD Memory Writing
In cases of using K area flag to turn off the datalog permission flag while data saving is in progress, all data
collected before reception of the relevant flag command are saved into the SD memory, and then the datalog
operation stops.
Therefore, a small time is required until the datalog function actually stops. The time required for datalog stop varies
depending on the volume of data collected.
While the datalog stop is being performed, DLxx_Stoping (xx is the group number) flag is turned on, and when the
stop is completed, _DLxx_Finish flag is turned on. During the stop, the size of the remaining dada to be saved to the
SD card is displayed in the _DLxx_WaitingData flag.
(3) Removal of Memory Card during Read/Write in SD Memory
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