Yokogawa Data Logging Software GA10 User Manual
Page 89
7-5
IM 04L65B01-01EN
When the communication interference is eliminated, the backfill function operates
automatically. The restored data is saved as a new file, and you can view it on the Data files
Page. Marks that indicate that backfill has been performed are added to the beginning and
end of the restored section of the data.
In the case of a short communication interference,*
data loss may be restored even when
the above settings are not specified. In such a case, GA10 does not create a new file but
writes directly to the recording file.
* The length of interruption time that makes this operation possible varies depending on the
connected device.
Note the following points.
• Handling of files collected by backfilling
Files collected by backfilling are the same as normal data files except for the point given
below.
• The file division conditions specified on the recording setting page do not apply.
Therefore, the files may become larger than normal data files.
• Other information
• Backfill is not performed if a communication error or other error had occurred at
the start of recording.
• If a backfill operation cannot start due to a device access failure or other reason,
GA10 will access the device every hour.
• If the server stops during a backfill operation, the operation will stop. Even if the
server is restarted, the previous backfill operation will not be performed.
• If any of the following settings on the device is changed after starting data
collection, backfill will not be performed.
Acquisition interval, time, channel on/off, decimal place, unit, span (scale), alarm
on/off, alarm type, and alarm value
Q5
The server stopped or the server PC shut down and then restarted.
How does the server operate after it restarts?
A5
Server recovery
The server retains the most recent status information just in case the host PC shuts down.
When the PC restarts, the server recovers the operation based on the status information.
Resuming data collection and recording
The server resumes data collection and recording after it restarts unless the user had
manually stopped the server or shut down the host PC.
Recording data
Chapter 7 Troubleshooting