Mitsubishi Electric MELSEC iQ-R Series User Manual page 53

■File switching timing
File switch timing can be specified from the following.
• Number of records
• File size specification
• Data conditions (comparison)
• Data conditions (value changes)
• Fixed cycle
• Time interval specification
• Time specification
• At module startup
• Trigger logging unit
(A file is switched after the number of lines after the trigger worth of data is output)
*1 Since the conditions are judged based on the data sampled at the specified sampling interval, a trigger will not be detected if the
condition is not satisfied at the time of data sampling.
Up to 8 conditions can be combined. However, up to 10 conditions can be combined when combining the trigger condition,
period specification, and folder switching timing. When the high speed sampling is specified to the sampling method, the
number of conditions that can be specified differs. For the number of conditions that can be specified, refer to the following:
MELSEC iQ-R High Speed Data Logger Module User's Manual (Startup)
When there is a change in the header line of the data logging file after the module is started or settings are updated, perform
a file switching to create a new accumulating file.
If the saved file name created at the time of file switching becomes the same name as the file name already exists, the
sequential number (1, 2) will be added to the end of the file name, then the INFO LED will turn ON.
Precautions
• When the file names are the same, the files with sequential numbers from 1 to 16 are created. However, for the files having
sequential number after 16, an error occurs and the file switching is not performed. Adjust the system so that it does not
have the same file name.
• When the saved file to which the sequential number of subscripts is added is deleted with a file browser or FTP, the
specified number of saved files to be created after that may not be created. Configure and adjust the system so that they do
not have the same file name. When the specified number of saved files are not created, clear the logging file in the
"Diagnostics" screen.(Page 221 SD memory card diagnostics)
● Operation example
The operation examples of each file switch timing is as follows.
The file switching (processing described below) is performed at the timing of
• Creating a saved file
• Deleting data in the accumulating file (A header-only file is created)
• Transferring the saved file to the FTP server and shared folder or mail server (When the transfer setting is set)
Ex.
Number of records: 1000 lines
Number of lines 997th line
(records)
Logging
*1
*1
File n
File switching
998th line 999th line 1000th
line
Logging Logging Logging
in each operation example.
File n+1
1st line 2nd line 3rd line
Logging Logging Logging
1 FUNCTION
1.1 Data Logging Function
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