Mitsubishi Electric QJ81DL96 User Manual page 221

9
REPORT FUNCTION
POINT
Be aware of the following points when laying out logged data in a report.
(1) The data logging file format must be binary file.
(2) If the total number of records in the source data logging files is not enough for
the specified number of records, only the records that exist in the source files
are output.
(3) Immediately after switching the programmable controller system ON, if a
creation trigger occurs when data does not exist in the data logging file, an
error occurs in the high speed data logger module.
Configure and construct the system so that the creation trigger occurs after
data are saved in the data logging file.
(4) Report output requires time.
According to the data logging save setting, the data logging file, including the
data when the creation trigger occurs, may be deleted before output to the
report is completed.
The data for the specified number of records are not output and an error
occurs in the high speed data logger module. Configure the high speed data
logger module and construct the system as shown below.
(a) Set the file switch timing in the data logging save settings to output a
large number of lines (number of records) to the report.
(b) Let the system run, and after reports have been generated a number of
times, check the report creation time in the buffer memory.
Report creation time (maximum) ( Section 3.4.13 (5))
(c) Set the file switch timing so that the time from the data logging file switch
to the next file switch is much larger than the report creation time (Two
times or more).
Example) When the report creation time is 2 seconds, data logging
sampling interval is 5 milliseconds.
(2000 [ms] x 2) / 5 [ms] = 800 [lines]
Set the file switch timing to 800 lines or more.
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