TotalFlow XRC6490, Руководство пользователя

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4-2
Backing up Configuration Files
Before you begin any maintenance on your XRC, you should collect the data and back up all
configuration files to your laptop's hard drive or a floppy disk. This safeguards your data and
allows you to re-start the unit without the hassle of re-configuring the XRC should any
problem arise.
Although there are “Save” buttons in the Entry Mode screens which allows the user to
backup “Entry” mode data items, a complete system backup is only accomplished by using
the “Save and Restore Utility”. When using this utility to backup files, the user should also
download the files to the S: drive in case of a “Cold” start.
• While in PCCU, use the Save and Restore Utility found under File Utilities in the
Operate drop down menu.
Changing XRC Clock
When any AGA applications are instantiated on the XRC, changing the clock could affect
the time when log period entries are made. To protect integrity of accounting audit trails, the
XRC handles these types of clock changes as follows:
Clock Change
Not Crossing
an Hour
Boundary: When next log period entry is made, clock is not altered.
Example: If present time is 4:15 p.m. and clock is changed to 4:05 p.m.
of the same day, the daily flow record is the same. Entry reflects
averages accumulated over a 70 minute time period (15 minutes plus 55
minutes).
Forward Clock
Change
Crossing an
Hourly
Boundary: Forces an log period entry for part of hour that has accumulated since
last hourly entry. XRC then advances to newly defined data flow record
boundary and begins maintaining balance of days' data in newly defined
boundary.
Example: If present time is 4:55 p.m. and clock is changed to 5:05 p.m.
of the same day, the entry reflects only a 55 minute average
accumulation. Then a new flow record is written and this period is also
based on a 55 minute accumulation.
Backward
Clock Change
Crossing an
Hourly
Boundary:
Hourly entry is made for part of hour that has accumulated since making
last hourly entry. This is same as for a Forward Clock Change Crossing
an Hourly Boundary. XRC advances to a new day’s data flow record and
maintains balance of day’s data in new record.
Example: If present time is 5:05 p.m. and clock is changed to 4:55 p.m.
of the same day, the log period record entry reflects only a 5 minute
average accumulation. Then a new flow record is written and this log
period is based on a 60 minute accumulation.
A backward clock change uses two (2) records to maintain data integrity.
This assures that previously recorded data is not overwritten.
If it is necessary to make small backward time changes, less than one (1)
hour, user should wait until current hour has progressed far enough to
make change that does not cross an hour boundary.