© 2008 Siemens Energy & Automation, Inc. All Rights Reserved
ACCESS 9340 and 9360 Meters PMCM-9340D-0208
Appendix B—Using the Command Interface 2/2008
EN–214
The meter can log the incremental energy data listed above. This
logged data provides all the information needed to analyze energy
and power usage against present or future utility rates. The
information is especially useful for comparing different time-of-use
rate structures.
When using the incremental energy feature, keep the following points
in mind:
• Peak demands help minimize the size of the data log in cases of
sliding or rolling demand. Shorter incremental energy periods
make it easier to reconstruct a load profile analysis.
• Since the incremental energy registers are synchronized to the
meter clock, it is possible to log this data from multiple circuits and
perform accurate totalizing.
Using Incremental Energy
Incremental energy accumulation begins at the specified start time
and ends at the specified end time. When the start time arrives, a
new incremental energy period begins. The start and end time are
specified in minutes from midnight. For example:
Interval: 420 minutes (7 hours)
Start time: 480 minutes (8:00 a.m.)
End time = 1440 minutes (12:00 p.m.)
The first incremental energy calculation will be from 8:00 a.m. to 3:00
p.m. (7 hours) as illustrated in Figure B–2 on page 215. The next
interval will be from 3:00 p.m. to 10:00 p.m., and the third interval will
be from 10 p.m. to 12:00 p.m. because 12:00 p.m. is the specified
end time. A new interval will begin on the next day at 8:00 a.m.
Incremental energy accumulation will continue in this manner until the
configuration is changed or a new interval is started by a remote
master.
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