Mitsubishi MELSEC Q series User Manual page 60

Specify the numbers of records before and after trigger in the following setting. ( Page 124, Section 8.4.10)
Setting item
No. of records (before trigger)
No. of records (after trigger)
Device value
After starting data logging, if the trigger condition is met before data collection of the specified number of records (before
trigger) is completed, the number of sampled records will be less than the specified.
With trigger logging setting, the specified data are collected at the specified interval or timing. Data of the specified
number of records before and after the trigger are extracted from the collected data, and saved in a data logging file in
the SD memory card.
Note that, in addition to the specified interval or timing, data are also collected when the trigger condition is met.
Program 0
Data sampling at the specified intervals or timing
("Each scanning cycle" in this case)
58
Specify the volume of the data sampled before trigger as the number of records.
Specify the volume of the data sampled after trigger (including at the time of trigger) as the
number of records.
No. of records before trigger No. of records after trigger
Scan time Scan time
END 0 END
END processing END processing
Sampling
Description
Trigger
Scan time
0 END 0
END processing
Sampling Sampling
Condition occurred
Sampling
Data sampling by trigger
Time
Scan time
END 0
END processing
Sampling