Data Logging File; Saving Format Of The Data Logging File; How Sampled Data Are Saved - Mitsubishi MELSEC Q series User Manual

6.5

Data Logging File

The target data of the data logging are saved in the data logging file.
6.5.1

Saving format of the data logging file

Data logging files are saved in the CSV format (the extension is ".CSV"). The CSV file format is a format of the files
that can be opened by general applications, such as Excel and Notepad. For the CSV file output format, refer to 
Page 37, Section 3.3.
6.5.2

How sampled data are saved

The following shows how sampled data are saved to an SD memory card.
CPU module
Device
area
Collects data of the
specified device.
For the file switching setting, refer to  Page 65, Section 6.5.3.
*1
Sampled data are stored in the specified buffer. The data in the buffer are saved to the SD memory card at the timing
of file saving. If all available space of the buffer is used up, the old data that have already been saved to the SD
memory card will be overwritten in chronological order.
64
Buffer
Buffer capacity for
setting 1
1st sampling data
2nd sampling data
3rd sampling data
Saved to SD
memory card.
nth sampling data
SD memory card
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,
:
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,
:
Data are temporarily stored in
Saved file
a stack file, which is changed
to a saved file at file switching
18:55:16 65,725,36,1
18:55:17 66,756,36,0
18:55:18 67,723,36,0
*1
18:55:19 68,741,36,0 timing.
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,
:
Saved file