File Switching Setting - Mitsubishi Electric MELSEC-L Series User Manual

6.5.3

File switching setting

The sampled target data of data logging are temporarily saved in a stack file in the SD memory card. The stack file can
be switched to the saved file so that the size of the stack file will not be too large. By renaming the stack file, it can be
switched to a saved file. (After change of the file name, a new stack file is created.)
(1) File switching timing
Files are switched at the following timing. This setting is available only for Continuous logging.
( Page 109, Section 8.4.10)
When the specified number of records is reached
When the specified file size is reached
Note that, regardless of the setting, the file is switched in the following cases.
• The number of records reached 65500.
• The file size reached 16M bytes.
• By changing the status from RUN to STOP or performing stop operation, the data logging paused or
stopped.
• Data logging is started while a stack file exists.
A number is appended to each file name until the specified number is reached, and the files are stored in the SD
memory card. When the specified number is exceeded, old files are deleted and new files are created.
Device data sampling
Device data sampling
A new stack file is created.
Switching timing
CHAPTER 6 DATA LOGGING FUNCTION
Stack file
18:55:16 65,725,36,1
18:55:17 66,756,36,0
18:55:18 67,723,36,0
18:55:19 68,741,36,0
18:55:20 69,712,36,1
18:55:20 70,724,36,1
18:55:20 71,732,36,1
18:55:20 72,733,
:
LOG01.CSV
File switching
Stack file Saved file
18:55:16 65,725,36,1
18:55:17 66,756,36,0
18:55:18 67,723,36,0
18:55:19 68,741,36,0
18:55:20 69,712,36,1
18:55:20 70,724,36,1
18:55:20 71,732,36,1
18:55:20 72,733,
:
LOG01.CSV LOG01_00000001.CSV
Setting range
100 to 65500 records
10 to 16384 k bytes
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